/var/www/wordpress/wp-admin/includes/admin.php
/var/www/wordpress/wp-admin/includes/bookmark.php
/var/www/wordpress/wp-admin/includes/class-ftp-pure.php
/var/www/wordpress/wp-admin/includes/class-ftp-sockets.php
/var/www/wordpress/wp-admin/includes/class-ftp.php
/var/www/wordpress/wp-admin/includes/class-pclzip.php
/var/www/wordpress/wp-admin/includes/class-wp-filesystem-base.php
/var/www/wordpress/wp-admin/includes/class-wp-filesystem-direct.php
/var/www/wordpress/wp-admin/includes/class-wp-filesystem-ftpext.php
/var/www/wordpress/wp-admin/includes/class-wp-filesystem-ftpsockets.php
/var/www/wordpress/wp-admin/includes/class-wp-filesystem-ssh2.php
/var/www/wordpress/wp-admin/includes/class-wp-importer.php
/var/www/wordpress/wp-admin/includes/class-wp-upgrader.php
/var/www/wordpress/wp-admin/includes/comment.php
/var/www/wordpress/wp-admin/includes/continents-cities.php
/var/www/wordpress/wp-admin/includes/dashboard.php
/var/www/wordpress/wp-admin/includes/deprecated.php
/var/www/wordpress/wp-admin/includes/export.php
/var/www/wordpress/wp-admin/includes/file.php
/var/www/wordpress/wp-admin/includes/image-edit.php
/var/www/wordpress/wp-admin/includes/image.php
/var/www/wordpress/wp-admin/includes/import.php
/var/www/wordpress/wp-admin/includes/manifest.php
/var/www/wordpress/wp-admin/includes/media.php
/var/www/wordpress/wp-admin/includes/meta-boxes.php
/var/www/wordpress/wp-admin/includes/misc.php
/var/www/wordpress/wp-admin/includes/ms-deprecated.php
/var/www/wordpress/wp-admin/includes/ms.php
/var/www/wordpress/wp-admin/includes/nav-menu.php
/var/www/wordpress/wp-admin/includes/plugin-install.php
/var/www/wordpress/wp-admin/includes/plugin.php
/var/www/wordpress/wp-admin/includes/post.php
/var/www/wordpress/wp-admin/includes/schema.php
/var/www/wordpress/wp-admin/includes/taxonomy.php
/var/www/wordpress/wp-admin/includes/template.php
/var/www/wordpress/wp-admin/includes/theme-install.php
/var/www/wordpress/wp-admin/includes/theme.php
/var/www/wordpress/wp-admin/includes/update-core.php
/var/www/wordpress/wp-admin/includes/update.php
/var/www/wordpress/wp-admin/includes/upgrade.php
/var/www/wordpress/wp-admin/includes/user.php
/var/www/wordpress/wp-admin/includes/widgets.php
/var/www/wordpress/wp-admin/js/revisions-js.php
/var/www/wordpress/wp-admin/maint/repair.php
/var/www/wordpress/wp-admin/admin-ajax.php
/var/www/wordpress/wp-admin/admin-footer.php
/var/www/wordpress/wp-admin/admin-functions.php
/var/www/wordpress/wp-admin/admin-header.php
/var/www/wordpress/wp-admin/admin-post.php
/var/www/wordpress/wp-admin/admin.php
/var/www/wordpress/wp-admin/async-upload.php
/var/www/wordpress/wp-admin/comment.php
/var/www/wordpress/wp-admin/custom-background.php
/var/www/wordpress/wp-admin/custom-header.php
/var/www/wordpress/wp-admin/edit-attachment-rows.php
/var/www/wordpress/wp-admin/edit-comments.php
/var/www/wordpress/wp-admin/edit-form-advanced.php
/var/www/wordpress/wp-admin/edit-form-comment.php
/var/www/wordpress/wp-admin/edit-link-categories.php
/var/www/wordpress/wp-admin/edit-link-category-form.php
/var/www/wordpress/wp-admin/edit-link-form.php
/var/www/wordpress/wp-admin/edit-post-rows.php
/var/www/wordpress/wp-admin/edit-tag-form.php
/var/www/wordpress/wp-admin/edit-tags.php
/var/www/wordpress/wp-admin/edit.php
/var/www/wordpress/wp-admin/export.php
/var/www/wordpress/wp-admin/gears-manifest.php
/var/www/wordpress/wp-admin/import.php
/var/www/wordpress/wp-admin/index-extra.php
/var/www/wordpress/wp-admin/index.php
/var/www/wordpress/wp-admin/install-helper.php
/var/www/wordpress/wp-admin/install.php
/var/www/wordpress/wp-admin/link-add.php
/var/www/wordpress/wp-admin/link-category.php
/var/www/wordpress/wp-admin/link-manager.php
/var/www/wordpress/wp-admin/link-parse-opml.php
/var/www/wordpress/wp-admin/link.php
/var/www/wordpress/wp-admin/load-scripts.php
/var/www/wordpress/wp-admin/load-styles.php
/var/www/wordpress/wp-admin/media-new.php
/var/www/wordpress/wp-admin/media-upload.php
/var/www/wordpress/wp-admin/media.php
/var/www/wordpress/wp-admin/menu-header.php
/var/www/wordpress/wp-admin/menu.php
/var/www/wordpress/wp-admin/moderation.php
/var/www/wordpress/wp-admin/ms-admin.php
/var/www/wordpress/wp-admin/ms-delete-site.php
/var/www/wordpress/wp-admin/ms-edit.php
/var/www/wordpress/wp-admin/ms-options.php
/var/www/wordpress/wp-admin/ms-sites.php
/var/www/wordpress/wp-admin/ms-themes.php
/var/www/wordpress/wp-admin/ms-upgrade-network.php
/var/www/wordpress/wp-admin/ms-users.php
/var/www/wordpress/wp-admin/my-sites.php
/var/www/wordpress/wp-admin/nav-menus.php
/var/www/wordpress/wp-admin/network.php
/var/www/wordpress/wp-admin/options-discussion.php
/var/www/wordpress/wp-admin/options-general.php
/var/www/wordpress/wp-admin/options-head.php
/var/www/wordpress/wp-admin/options-media.php
/var/www/wordpress/wp-admin/options-permalink.php
/var/www/wordpress/wp-admin/options-privacy.php
/var/www/wordpress/wp-admin/options-reading.php
/var/www/wordpress/wp-admin/options-writing.php
/var/www/wordpress/wp-admin/options.php
/var/www/wordpress/wp-admin/plugin-editor.php
/var/www/wordpress/wp-admin/plugin-install.php
/var/www/wordpress/wp-admin/plugins.php
/var/www/wordpress/wp-admin/post-new.php
/var/www/wordpress/wp-admin/post.php
/var/www/wordpress/wp-admin/press-this.php
/var/www/wordpress/wp-admin/profile.php
/var/www/wordpress/wp-admin/revision.php
/var/www/wordpress/wp-admin/setup-config.php
/var/www/wordpress/wp-admin/sidebar.php
/var/www/wordpress/wp-admin/theme-editor.php
/var/www/wordpress/wp-admin/theme-install.php
/var/www/wordpress/wp-admin/themes.php
/var/www/wordpress/wp-admin/tools.php
/var/www/wordpress/wp-admin/update-core.php
/var/www/wordpress/wp-admin/update.php
/var/www/wordpress/wp-admin/upgrade-functions.php
/var/www/wordpress/wp-admin/upgrade.php
/var/www/wordpress/wp-admin/upload.php
/var/www/wordpress/wp-admin/user-edit.php
/var/www/wordpress/wp-admin/user-new.php
/var/www/wordpress/wp-admin/users.php
/var/www/wordpress/wp-admin/widgets.php
/var/www/wordpress/wp-content/languages/ru_RU.php
/var/www/wordpress/wp-content/plugins/akismet/akismet.php
/var/www/wordpress/wp-content/plugins/rh/rh.php
/var/www/wordpress/wp-content/plugins/hello.php
/var/www/wordpress/wp-content/plugins/index.php
/var/www/wordpress/wp-content/themes/twentyten/404.php
/var/www/wordpress/wp-content/themes/twentyten/archive.php
/var/www/wordpress/wp-content/themes/twentyten/attachment.php
/var/www/wordpress/wp-content/themes/twentyten/author.php
/var/www/wordpress/wp-content/themes/twentyten/category.php
/var/www/wordpress/wp-content/themes/twentyten/comments.php
/var/www/wordpress/wp-content/themes/twentyten/footer.php
/var/www/wordpress/wp-content/themes/twentyten/functions.php
/var/www/wordpress/wp-content/themes/twentyten/header.php
/var/www/wordpress/wp-content/themes/twentyten/index.php
/var/www/wordpress/wp-content/themes/twentyten/loop.php
/var/www/wordpress/wp-content/themes/twentyten/onecolumn-page.php
/var/www/wordpress/wp-content/themes/twentyten/page.php
/var/www/wordpress/wp-content/themes/twentyten/search.php
/var/www/wordpress/wp-content/themes/twentyten/sidebar-footer.php
/var/www/wordpress/wp-content/themes/twentyten/sidebar.php
/var/www/wordpress/wp-content/themes/twentyten/single.php
/var/www/wordpress/wp-content/themes/twentyten/tag.php
/var/www/wordpress/wp-content/themes/index.php
/var/www/wordpress/wp-content/index.php
/var/www/wordpress/wp-includes/js/tinymce/langs/wp-langs.php
/var/www/wordpress/wp-includes/js/tinymce/plugins/spellchecker/classes/utils/JSON.php
/var/www/wordpress/wp-includes/js/tinymce/plugins/spellchecker/classes/utils/Logger.php
/var/www/wordpress/wp-includes/js/tinymce/plugins/spellchecker/classes/EnchantSpell.php
/var/www/wordpress/wp-includes/js/tinymce/plugins/spellchecker/classes/GoogleSpell.php
/var/www/wordpress/wp-includes/js/tinymce/plugins/spellchecker/classes/PSpell.php
/var/www/wordpress/wp-includes/js/tinymce/plugins/spellchecker/classes/PSpellShell.php
/var/www/wordpress/wp-includes/js/tinymce/plugins/spellchecker/classes/SpellChecker.php
/var/www/wordpress/wp-includes/js/tinymce/plugins/spellchecker/includes/general.php
/var/www/wordpress/wp-includes/js/tinymce/plugins/spellchecker/config.php
/var/www/wordpress/wp-includes/js/tinymce/plugins/spellchecker/rpc.php
/var/www/wordpress/wp-includes/js/tinymce/wp-mce-help.php
/var/www/wordpress/wp-includes/js/tinymce/wp-tinymce.php
/var/www/wordpress/wp-includes/pomo/entry.php
/var/www/wordpress/wp-includes/pomo/mo.php
/var/www/wordpress/wp-includes/pomo/po.php
/var/www/wordpress/wp-includes/pomo/streams.php
/var/www/wordpress/wp-includes/pomo/translations.php
/var/www/wordpress/wp-includes/Text/Diff/Engine/native.php
/var/www/wordpress/wp-includes/Text/Diff/Engine/shell.php
/var/www/wordpress/wp-includes/Text/Diff/Engine/string.php
/var/www/wordpress/wp-includes/Text/Diff/Engine/xdiff.php
/var/www/wordpress/wp-includes/Text/Diff/Renderer/inline.php
/var/www/wordpress/wp-includes/Text/Diff/Renderer.php
/var/www/wordpress/wp-includes/Text/Diff.php
/var/www/wordpress/wp-includes/theme-compat/comments-popup.php
/var/www/wordpress/wp-includes/theme-compat/comments.php
/var/www/wordpress/wp-includes/theme-compat/footer.php
/var/www/wordpress/wp-includes/theme-compat/header.php
/var/www/wordpress/wp-includes/theme-compat/sidebar.php
/var/www/wordpress/wp-includes/atomlib.php
/var/www/wordpress/wp-includes/author-template.php
/var/www/wordpress/wp-includes/bookmark-template.php
/var/www/wordpress/wp-includes/bookmark.php
/var/www/wordpress/wp-includes/cache.php
/var/www/wordpress/wp-includes/canonical.php
/var/www/wordpress/wp-includes/capabilities.php
/var/www/wordpress/wp-includes/category-template.php
/var/www/wordpress/wp-includes/category.php
/var/www/wordpress/wp-includes/class-feed.php
/var/www/wordpress/wp-includes/class-http.php
/var/www/wordpress/wp-includes/class-IXR.php
/var/www/wordpress/wp-includes/class-json.php
/var/www/wordpress/wp-includes/class-oembed.php
/var/www/wordpress/wp-includes/class-phpass.php
/var/www/wordpress/wp-includes/class-phpmailer.php
/var/www/wordpress/wp-includes/class-pop3.php
/var/www/wordpress/wp-includes/class-simplepie.php
/var/www/wordpress/wp-includes/class-smtp.php
/var/www/wordpress/wp-includes/class-snoopy.php
/var/www/wordpress/wp-includes/class.wp-dependencies.php
/var/www/wordpress/wp-includes/class.wp-scripts.php
/var/www/wordpress/wp-includes/class.wp-styles.php
/var/www/wordpress/wp-includes/classes.php
/var/www/wordpress/wp-includes/comment-template.php
/var/www/wordpress/wp-includes/comment.php
/var/www/wordpress/wp-includes/compat.php
/var/www/wordpress/wp-includes/cron.php
/var/www/wordpress/wp-includes/default-constants.php
/var/www/wordpress/wp-includes/default-embeds.php
/var/www/wordpress/wp-includes/default-filters.php
/var/www/wordpress/wp-includes/default-widgets.php
/var/www/wordpress/wp-includes/deprecated.php
/var/www/wordpress/wp-includes/feed-atom-comments.php
/var/www/wordpress/wp-includes/feed-atom.php
/var/www/wordpress/wp-includes/feed-rdf.php
/var/www/wordpress/wp-includes/feed-rss.php
/var/www/wordpress/wp-includes/feed-rss2-comments.php
/var/www/wordpress/wp-includes/feed-rss2.php
/var/www/wordpress/wp-includes/feed.php
/var/www/wordpress/wp-includes/formatting.php
/var/www/wordpress/wp-includes/functions.php
/var/www/wordpress/wp-includes/functions.wp-scripts.php
/var/www/wordpress/wp-includes/functions.wp-styles.php
/var/www/wordpress/wp-includes/general-template.php
/var/www/wordpress/wp-includes/http.php
/var/www/wordpress/wp-includes/kses.php
/var/www/wordpress/wp-includes/l10n.php
/var/www/wordpress/wp-includes/link-template.php
/var/www/wordpress/wp-includes/load.php
/var/www/wordpress/wp-includes/locale.php
/var/www/wordpress/wp-includes/media.php
#CodeDescriptions
1<?php
2/**
3 * WordPress API for media display.
4 *
5 * @package WordPress
6 */
7
8/**
9 * Scale down the default size of an image.
10 *
11 * This is so that the image is a better fit for the editor and theme.
12 *
13 * The $size parameter accepts either an array or a string. The supported string
14 * values are 'thumb' or 'thumbnail' for the given thumbnail size or defaults at
15 * 128 width and 96 height in pixels. Also supported for the string value is
16 * 'medium' and 'full'. The 'full' isn't actually supported, but any value other
17 * than the supported will result in the content_width size or 500 if that is
18 * not set.
19 *
20 * Finally, there is a filter named, 'editor_max_image_size' that will be called
21 * on the calculated array for width and height, respectively. The second
22 * parameter will be the value that was in the $size parameter. The returned
23 * type for the hook is an array with the width as the first element and the
24 * height as the second element.
25 *
26 * @since 2.5.0
27 * @uses wp_constrain_dimensions() This function passes the widths and the heights.
28 *
29 * @param int $width Width of the image
30 * @param int $height Height of the image
31 * @param string|array $size Size of what the result image should be.
32 * @return array Width and height of what the result image should resize to.
33 */
34function image_constrain_size_for_editor($width, $height, $size = 'medium') {
35 global $content_width, $_wp_additional_image_sizes;
36
37 if ( is_array($size) ) {
38 $max_width = $size[0];
39 $max_height = $size[1];
40 }
41 elseif ( $size == 'thumb' || $size == 'thumbnail' ) {
42 $max_width = intval(get_option('thumbnail_size_w'));
43 $max_height = intval(get_option('thumbnail_size_h'));
44 // last chance thumbnail size defaults
45 if ( !$max_width && !$max_height ) {
46 $max_width = 128;
47 $max_height = 96;
48 }
49 }
50 elseif ( $size == 'medium' ) {
51 $max_width = intval(get_option('medium_size_w'));
52 $max_height = intval(get_option('medium_size_h'));
53 // if no width is set, default to the theme content width if available
54 }
55 elseif ( $size == 'large' ) {
56 // we're inserting a large size image into the editor. if it's a really
57 // big image we'll scale it down to fit reasonably within the editor
58 // itself, and within the theme's content width if it's known. the user
59 // can resize it in the editor if they wish.
60 $max_width = intval(get_option('large_size_w'));
61 $max_height = intval(get_option('large_size_h'));
62 if ( intval($content_width) > 0 )
63 $max_width = min( intval($content_width), $max_width );
64 } elseif ( isset( $_wp_additional_image_sizes ) && count( $_wp_additional_image_sizes ) && in_array( $size, array_keys( $_wp_additional_image_sizes ) ) ) {
65 $max_width = intval( $_wp_additional_image_sizes[$size]['width'] );
66 $max_height = intval( $_wp_additional_image_sizes[$size]['height'] );
67 if ( intval($content_width) > 0 && is_admin() ) // Only in admin. Assume that theme authors know what they're doing.
68 $max_width = min( intval($content_width), $max_width );
69 }
70 // $size == 'full' has no constraint
71 else {
72 $max_width = $width;
73 $max_height = $height;
74 }
75
76 list( $max_width, $max_height ) = apply_filters( 'editor_max_image_size', array( $max_width, $max_height ), $size );
77
78 return wp_constrain_dimensions( $width, $height, $max_width, $max_height );
79}
80
81/**
82 * Retrieve width and height attributes using given width and height values.
83 *
84 * Both attributes are required in the sense that both parameters must have a
85 * value, but are optional in that if you set them to false or null, then they
86 * will not be added to the returned string.
87 *
88 * You can set the value using a string, but it will only take numeric values.
89 * If you wish to put 'px' after the numbers, then it will be stripped out of
90 * the return.
91 *
92 * @since 2.5.0
93 *
94 * @param int|string $width Optional. Width attribute value.
95 * @param int|string $height Optional. Height attribute value.
96 * @return string HTML attributes for width and, or height.
97 */
98function image_hwstring($width, $height) {
99 $out = '';
100 if ($width)
101 $out .= 'width="'.intval($width).'" ';
102 if ($height)
103 $out .= 'height="'.intval($height).'" ';
104 return $out;
105}
106
107/**
108 * Scale an image to fit a particular size (such as 'thumb' or 'medium').
109 *
110 * Array with image url, width, height, and whether is intermediate size, in
111 * that order is returned on success is returned. $is_intermediate is true if
112 * $url is a resized image, false if it is the original.
113 *
114 * The URL might be the original image, or it might be a resized version. This
115 * function won't create a new resized copy, it will just return an already
116 * resized one if it exists.
117 *
118 * A plugin may use the 'image_downsize' filter to hook into and offer image
119 * resizing services for images. The hook must return an array with the same
120 * elements that are returned in the function. The first element being the URL
121 * to the new image that was resized.
122 *
123 * @since 2.5.0
124 * @uses apply_filters() Calls 'image_downsize' on $id and $size to provide
125 * resize services.
126 *
127 * @param int $id Attachment ID for image.
128 * @param string $size Optional, default is 'medium'. Size of image, can be 'thumbnail'.
129 * @return bool|array False on failure, array on success.
130 */
131function image_downsize($id, $size = 'medium') {
132
133 if ( !wp_attachment_is_image($id) )
134 return false;
135
136 $img_url = wp_get_attachment_url($id);
137 $meta = wp_get_attachment_metadata($id);
138 $width = $height = 0;
139 $is_intermediate = false;
140
141 // plugins can use this to provide resize services
142 if ( $out = apply_filters('image_downsize', false, $id, $size) )
143 return $out;
144
145 // try for a new style intermediate size
146 if ( $intermediate = image_get_intermediate_size($id, $size) ) {
147 $img_url = str_replace(basename($img_url), $intermediate['file'], $img_url);//Arbitrary file disclosing
148 $width = $intermediate['width'];
149 $height = $intermediate['height'];
150 $is_intermediate = true;
151 }
152 elseif ( $size == 'thumbnail' ) {
153 // fall back to the old thumbnail
154 if ( ($thumb_file = wp_get_attachment_thumb_file($id)) && $info = getimagesize($thumb_file) ) {
155 $img_url = str_replace(basename($img_url), basename($thumb_file), $img_url);//Arbitrary file disclosing
156 $width = $info[0];
157 $height = $info[1];
158 $is_intermediate = true;
159 }
160 }
161 if ( !$width && !$height && isset($meta['width'], $meta['height']) ) {
162 // any other type: use the real image
163 $width = $meta['width'];
164 $height = $meta['height'];
165 }
166
167 if ( $img_url) {
168 // we have the actual image size, but might need to further constrain it if content_width is narrower
169 list( $width, $height ) = image_constrain_size_for_editor( $width, $height, $size );
170
171 return array( $img_url, $width, $height, $is_intermediate );
172 }
173 return false;
174
175}
176
177/**
178 * Registers a new image size
179 */
180function add_image_size( $name, $width = 0, $height = 0, $crop = FALSE ) {
181 global $_wp_additional_image_sizes;
182 $_wp_additional_image_sizes[$name] = array( 'width' => absint( $width ), 'height' => absint( $height ), 'crop' => !!$crop );
183}
184
185/**
186 * Registers an image size for the post thumbnail
187 */
188function set_post_thumbnail_size( $width = 0, $height = 0, $crop = FALSE ) {
189 add_image_size( 'post-thumbnail', $width, $height, $crop );
190}
191
192/**
193 * An <img src /> tag for an image attachment, scaling it down if requested.
194 *
195 * The filter 'get_image_tag_class' allows for changing the class name for the
196 * image without having to use regular expressions on the HTML content. The
197 * parameters are: what WordPress will use for the class, the Attachment ID,
198 * image align value, and the size the image should be.
199 *
200 * The second filter 'get_image_tag' has the HTML content, which can then be
201 * further manipulated by a plugin to change all attribute values and even HTML
202 * content.
203 *
204 * @since 2.5.0
205 *
206 * @uses apply_filters() The 'get_image_tag_class' filter is the IMG element
207 * class attribute.
208 * @uses apply_filters() The 'get_image_tag' filter is the full IMG element with
209 * all attributes.
210 *
211 * @param int $id Attachment ID.
212 * @param string $alt Image Description for the alt attribute.
213 * @param string $title Image Description for the title attribute.
214 * @param string $align Part of the class name for aligning the image.
215 * @param string $size Optional. Default is 'medium'.
216 * @return string HTML IMG element for given image attachment
217 */
218function get_image_tag($id, $alt, $title, $align, $size='medium') {
219
220 list( $img_src, $width, $height ) = image_downsize($id, $size);
221 $hwstring = image_hwstring($width, $height);
222
223 $class = 'align' . esc_attr($align) .' size-' . esc_attr($size) . ' wp-image-' . $id;
224 $class = apply_filters('get_image_tag_class', $class, $id, $align, $size);
225
226 $html = '<img src="' . esc_attr($img_src) . '" alt="' . esc_attr($alt) . '" title="' . esc_attr($title).'" '.$hwstring.'class="'.$class.'" />';
227
228 $html = apply_filters( 'get_image_tag', $html, $id, $alt, $title, $align, $size );
229
230 return $html;
231}
232
233/**
234 * Load an image from a string, if PHP supports it.
235 *
236 * @since 2.1.0
237 *
238 * @param string $file Filename of the image to load.
239 * @return resource The resulting image resource on success, Error string on failure.
240 */
241function wp_load_image( $file ) {
242 if ( is_numeric( $file ) )
243 $file = get_attached_file( $file );//Arbitrary file disclosing
244
245 if ( ! file_exists( $file ) )
246 return sprintf(__('File “%s” doesn’t exist?'), $file);
247
248 if ( ! function_exists('imagecreatefromstring') )
249 return __('The GD image library is not installed.');
250
251 // Set artificially high because GD uses uncompressed images in memory
252 @ini_set('memory_limit', '256M');
253 $image = imagecreatefromstring( file_get_contents( $file ) );//Arbitrary file disclosing
254
255 if ( !is_resource( $image ) )
256 return sprintf(__('File “%s” is not an image.'), $file);
257
258 return $image;
259}
260
261/**
262 * Calculates the new dimentions for a downsampled image.
263 *
264 * If either width or height are empty, no constraint is applied on
265 * that dimension.
266 *
267 * @since 2.5.0
268 *
269 * @param int $current_width Current width of the image.
270 * @param int $current_height Current height of the image.
271 * @param int $max_width Optional. Maximum wanted width.
272 * @param int $max_height Optional. Maximum wanted height.
273 * @return array First item is the width, the second item is the height.
274 */
275function wp_constrain_dimensions( $current_width, $current_height, $max_width=0, $max_height=0 ) {
276 if ( !$max_width and !$max_height )
277 return array( $current_width, $current_height );
278
279 $width_ratio = $height_ratio = 1.0;
280 $did_width = $did_height = false;
281
282 if ( $max_width > 0 && $current_width > 0 && $current_width > $max_width ) {
283 $width_ratio = $max_width / $current_width;
284 $did_width = true;
285 }
286
287 if ( $max_height > 0 && $current_height > 0 && $current_height > $max_height ) {
288 $height_ratio = $max_height / $current_height;
289 $did_height = true;
290 }
291
292 // Calculate the larger/smaller ratios
293 $smaller_ratio = min( $width_ratio, $height_ratio );
294 $larger_ratio = max( $width_ratio, $height_ratio );
295
296 if ( intval( $current_width * $larger_ratio ) > $max_width || intval( $current_height * $larger_ratio ) > $max_height )
297 // The larger ratio is too big. It would result in an overflow.
298 $ratio = $smaller_ratio;
299 else
300 // The larger ratio fits, and is likely to be a more "snug" fit.
301 $ratio = $larger_ratio;
302
303 $w = intval( $current_width * $ratio );
304 $h = intval( $current_height * $ratio );
305
306 // Sometimes, due to rounding, we'll end up with a result like this: 465x700 in a 177x177 box is 117x176... a pixel short
307 // We also have issues with recursive calls resulting in an ever-changing result. Contraining to the result of a constraint should yield the original result.
308 // Thus we look for dimensions that are one pixel shy of the max value and bump them up
309 if ( $did_width && $w == $max_width - 1 )
310 $w = $max_width; // Round it up
311 if ( $did_height && $h == $max_height - 1 )
312 $h = $max_height; // Round it up
313
314 return array( $w, $h );
315}
316
317/**
318 * Retrieve calculated resized dimensions for use in imagecopyresampled().
319 *
320 * Calculate dimensions and coordinates for a resized image that fits within a
321 * specified width and height. If $crop is true, the largest matching central
322 * portion of the image will be cropped out and resized to the required size.
323 *
324 * @since 2.5.0
325 *
326 * @param int $orig_w Original width.
327 * @param int $orig_h Original height.
328 * @param int $dest_w New width.
329 * @param int $dest_h New height.
330 * @param bool $crop Optional, default is false. Whether to crop image or resize.
331 * @return bool|array False, on failure. Returned array matches parameters for imagecopyresampled() PHP function.
332 */
333function image_resize_dimensions($orig_w, $orig_h, $dest_w, $dest_h, $crop = false) {
334
335 if ($orig_w <= 0 || $orig_h <= 0)
336 return false;
337 // at least one of dest_w or dest_h must be specific
338 if ($dest_w <= 0 && $dest_h <= 0)
339 return false;
340
341 if ( $crop ) {
342 // crop the largest possible portion of the original image that we can size to $dest_w x $dest_h
343 $aspect_ratio = $orig_w / $orig_h;
344 $new_w = min($dest_w, $orig_w);
345 $new_h = min($dest_h, $orig_h);
346
347 if ( !$new_w ) {
348 $new_w = intval($new_h * $aspect_ratio);
349 }
350
351 if ( !$new_h ) {
352 $new_h = intval($new_w / $aspect_ratio);
353 }
354
355 $size_ratio = max($new_w / $orig_w, $new_h / $orig_h);
356
357 $crop_w = round($new_w / $size_ratio);
358 $crop_h = round($new_h / $size_ratio);
359
360 $s_x = floor( ($orig_w - $crop_w) / 2 );
361 $s_y = floor( ($orig_h - $crop_h) / 2 );
362 } else {
363 // don't crop, just resize using $dest_w x $dest_h as a maximum bounding box
364 $crop_w = $orig_w;
365 $crop_h = $orig_h;
366
367 $s_x = 0;
368 $s_y = 0;
369
370 list( $new_w, $new_h ) = wp_constrain_dimensions( $orig_w, $orig_h, $dest_w, $dest_h );
371 }
372
373 // if the resulting image would be the same size or larger we don't want to resize it
374 if ( $new_w >= $orig_w && $new_h >= $orig_h )
375 return false;
376
377 // the return array matches the parameters to imagecopyresampled()
378 // int dst_x, int dst_y, int src_x, int src_y, int dst_w, int dst_h, int src_w, int src_h
379 return array( 0, 0, (int) $s_x, (int) $s_y, (int) $new_w, (int) $new_h, (int) $crop_w, (int) $crop_h );
380
381}
382
383/**
384 * Scale down an image to fit a particular size and save a new copy of the image.
385 *
386 * The PNG transparency will be preserved using the function, as well as the
387 * image type. If the file going in is PNG, then the resized image is going to
388 * be PNG. The only supported image types are PNG, GIF, and JPEG.
389 *
390 * Some functionality requires API to exist, so some PHP version may lose out
391 * support. This is not the fault of WordPress (where functionality is
392 * downgraded, not actual defects), but of your PHP version.
393 *
394 * @since 2.5.0
395 *
396 * @param string $file Image file path.
397 * @param int $max_w Maximum width to resize to.
398 * @param int $max_h Maximum height to resize to.
399 * @param bool $crop Optional. Whether to crop image or resize.
400 * @param string $suffix Optional. File Suffix.
401 * @param string $dest_path Optional. New image file path.
402 * @param int $jpeg_quality Optional, default is 90. Image quality percentage.
403 * @return mixed WP_Error on failure. String with new destination path.
404 */
405function image_resize( $file, $max_w, $max_h, $crop = false, $suffix = null, $dest_path = null, $jpeg_quality = 90 ) {
406
407 $image = wp_load_image( $file );
408 if ( !is_resource( $image ) )
409 return new WP_Error( 'error_loading_image', $image, $file );
410
411 $size = @getimagesize( $file );
412 if ( !$size )
413 return new WP_Error('invalid_image', __('Could not read image size'), $file);
414 list($orig_w, $orig_h, $orig_type) = $size;
415
416 $dims = image_resize_dimensions($orig_w, $orig_h, $max_w, $max_h, $crop);
417 if ( !$dims )
418 return new WP_Error( 'error_getting_dimensions', __('Could not calculate resized image dimensions') );
419 list($dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h) = $dims;
420
421 $newimage = wp_imagecreatetruecolor( $dst_w, $dst_h );
422
423 imagecopyresampled( $newimage, $image, $dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h);
424
425 // convert from full colors to index colors, like original PNG.
426 if ( IMAGETYPE_PNG == $orig_type && function_exists('imageistruecolor') && !imageistruecolor( $image ) )
427 imagetruecolortopalette( $newimage, false, imagecolorstotal( $image ) );
428
429 // we don't need the original in memory anymore
430 imagedestroy( $image );
431
432 // $suffix will be appended to the destination filename, just before the extension
433 if ( !$suffix )
434 $suffix = "{$dst_w}x{$dst_h}";
435
436 $info = pathinfo($file);
437 $dir = $info['dirname'];
438 $ext = $info['extension'];
439 $name = basename($file, ".{$ext}");//Arbitrary file disclosing
440 if ( !is_null($dest_path) and $_dest_path = realpath($dest_path) )
441 $dir = $_dest_path;
442 $destfilename = "{$dir}/{$name}-{$suffix}.{$ext}";
443
444 if ( IMAGETYPE_GIF == $orig_type ) {
445 if ( !imagegif( $newimage, $destfilename ) )
446 return new WP_Error('resize_path_invalid', __( 'Resize path invalid' ));
447 } elseif ( IMAGETYPE_PNG == $orig_type ) {
448 if ( !imagepng( $newimage, $destfilename ) )
449 return new WP_Error('resize_path_invalid', __( 'Resize path invalid' ));
450 } else {
451 // all other formats are converted to jpg
452 $destfilename = "{$dir}/{$name}-{$suffix}.jpg";
453 if ( !imagejpeg( $newimage, $destfilename, apply_filters( 'jpeg_quality', $jpeg_quality, 'image_resize' ) ) )
454 return new WP_Error('resize_path_invalid', __( 'Resize path invalid' ));
455 }
456
457 imagedestroy( $newimage );
458
459 // Set correct file permissions
460 $stat = stat( dirname( $destfilename ));
461 $perms = $stat['mode'] & 0000666; //same permissions as parent folder, strip off the executable bits
462 @ chmod( $destfilename, $perms );//Arbitrary file manipulations
463
464 return $destfilename;
465}
466
467/**
468 * Resize an image to make a thumbnail or intermediate size.
469 *
470 * The returned array has the file size, the image width, and image height. The
471 * filter 'image_make_intermediate_size' can be used to hook in and change the
472 * values of the returned array. The only parameter is the resized file path.
473 *
474 * @since 2.5.0
475 *
476 * @param string $file File path.
477 * @param int $width Image width.
478 * @param int $height Image height.
479 * @param bool $crop Optional, default is false. Whether to crop image to specified height and width or resize.
480 * @return bool|array False, if no image was created. Metadata array on success.
481 */
482function image_make_intermediate_size($file, $width, $height, $crop=false) {
483 if ( $width || $height ) {
484 $resized_file = image_resize($file, $width, $height, $crop);//Arbitrary file disclosing
485 if ( !is_wp_error($resized_file) && $resized_file && $info = getimagesize($resized_file) ) {
486 $resized_file = apply_filters('image_make_intermediate_size', $resized_file);
487 return array(
488 'file' => basename( $resized_file ),
489 'width' => $info[0],
490 'height' => $info[1],
491 );
492 }
493 }
494 return false;
495}
496
497/**
498 * Retrieve the image's intermediate size (resized) path, width, and height.
499 *
500 * The $size parameter can be an array with the width and height respectively.
501 * If the size matches the 'sizes' metadata array for width and height, then it
502 * will be used. If there is no direct match, then the nearest image size larger
503 * than the specified size will be used. If nothing is found, then the function
504 * will break out and return false.
505 *
506 * The metadata 'sizes' is used for compatible sizes that can be used for the
507 * parameter $size value.
508 *
509 * The url path will be given, when the $size parameter is a string.
510 *
511 * If you are passing an array for the $size, you should consider using
512 * add_image_size() so that a cropped version is generated. It's much more
513 * efficient than having to find the closest-sized image and then having the
514 * browser scale down the image.
515 *
516 * @since 2.5.0
517 * @see add_image_size()
518 *
519 * @param int $post_id Attachment ID for image.
520 * @param array|string $size Optional, default is 'thumbnail'. Size of image, either array or string.
521 * @return bool|array False on failure or array of file path, width, and height on success.
522 */
523function image_get_intermediate_size($post_id, $size='thumbnail') {
524 if ( !is_array( $imagedata = wp_get_attachment_metadata( $post_id ) ) )
525 return false;
526
527 // get the best one for a specified set of dimensions
528 if ( is_array($size) && !empty($imagedata['sizes']) ) {
529 foreach ( $imagedata['sizes'] as $_size => $data ) {
530 // already cropped to width or height; so use this size
531 if ( ( $data['width'] == $size[0] && $data['height'] <= $size[1] ) || ( $data['height'] == $size[1] && $data['width'] <= $size[0] ) ) {
532 $file = $data['file'];//Arbitrary file disclosing
533 list($width, $height) = image_constrain_size_for_editor( $data['width'], $data['height'], $size );
534 return compact( 'file', 'width', 'height' );
535 }
536 // add to lookup table: area => size
537 $areas[$data['width'] * $data['height']] = $_size;
538 }
539 if ( !$size || !empty($areas) ) {
540 // find for the smallest image not smaller than the desired size
541 ksort($areas);
542 foreach ( $areas as $_size ) {
543 $data = $imagedata['sizes'][$_size];
544 if ( $data['width'] >= $size[0] || $data['height'] >= $size[1] ) {
545 // Skip images with unexpectedly divergent aspect ratios (crops)
546 // First, we calculate what size the original image would be if constrained to a box the size of the current image in the loop
547 $maybe_cropped = image_resize_dimensions($imagedata['width'], $imagedata['height'], $data['width'], $data['height'], false );
548 // If the size doesn't match within one pixel, then it is of a different aspect ratio, so we skip it, unless it's the thumbnail size
549 if ( 'thumbnail' != $_size && ( !$maybe_cropped || ( $maybe_cropped[4] != $data['width'] && $maybe_cropped[4] + 1 != $data['width'] ) || ( $maybe_cropped[5] != $data['height'] && $maybe_cropped[5] + 1 != $data['height'] ) ) )
550 continue;
551 // If we're still here, then we're going to use this size
552 $file = $data['file'];//Arbitrary file disclosing
553 list($width, $height) = image_constrain_size_for_editor( $data['width'], $data['height'], $size );
554 return compact( 'file', 'width', 'height' );
555 }
556 }
557 }
558 }
559
560 if ( is_array($size) || empty($size) || empty($imagedata['sizes'][$size]) )
561 return false;
562
563 $data = $imagedata['sizes'][$size];
564 // include the full filesystem path of the intermediate file
565 if ( empty($data['path']) && !empty($data['file']) ) {
566 $file_url = wp_get_attachment_url($post_id);
567 $data['path'] = path_join( dirname($imagedata['file']), $data['file'] );//Arbitrary file disclosing
568 $data['url'] = path_join( dirname($file_url), $data['file'] );
569 }
570 return $data;
571}
572
573/**
574 * Get the available image sizes
575 * @since 3.0.0
576 * @return array Returns a filtered array of image size strings
577 */
578function get_intermediate_image_sizes() {
579 global $_wp_additional_image_sizes;
580 $image_sizes = array('thumbnail', 'medium', 'large'); // Standard sizes
581 if ( isset( $_wp_additional_image_sizes ) && count( $_wp_additional_image_sizes ) )
582 $image_sizes = array_merge( $image_sizes, array_keys( $_wp_additional_image_sizes ) );
583
584 return apply_filters( 'intermediate_image_sizes', $image_sizes );
585}
586
587/**
588 * Retrieve an image to represent an attachment.
589 *
590 * A mime icon for files, thumbnail or intermediate size for images.
591 *
592 * @since 2.5.0
593 *
594 * @param int $attachment_id Image attachment ID.
595 * @param string $size Optional, default is 'thumbnail'.
596 * @param bool $icon Optional, default is false. Whether it is an icon.
597 * @return bool|array Returns an array (url, width, height), or false, if no image is available.
598 */
599function wp_get_attachment_image_src($attachment_id, $size='thumbnail', $icon = false) {
600
601 // get a thumbnail or intermediate image if there is one
602 if ( $image = image_downsize($attachment_id, $size) )
603 return $image;
604
605 $src = false;
606
607 if ( $icon && $src = wp_mime_type_icon($attachment_id) ) {
608 $icon_dir = apply_filters( 'icon_dir', ABSPATH . WPINC . '/images/crystal' );
609 $src_file = $icon_dir . '/' . basename($src);//Arbitrary file disclosing
610 @list($width, $height) = getimagesize($src_file);
611 }
612 if ( $src && $width && $height )
613 return array( $src, $width, $height );
614 return false;
615}
616
617/**
618 * Get an HTML img element representing an image attachment
619 *
620 * While $size will accept an array, it is better to register a size with
621 * add_image_size() so that a cropped version is generated. It's much more
622 * efficient than having to find the closest-sized image and then having the
623 * browser scale down the image.
624 *
625 * @see add_image_size()
626 * @uses apply_filters() Calls 'wp_get_attachment_image_attributes' hook on attributes array
627 * @uses wp_get_attachment_image_src() Gets attachment file URL and dimensions
628 * @since 2.5.0
629 *
630 * @param int $attachment_id Image attachment ID.
631 * @param string $size Optional, default is 'thumbnail'.
632 * @param bool $icon Optional, default is false. Whether it is an icon.
633 * @return string HTML img element or empty string on failure.
634 */
635function wp_get_attachment_image($attachment_id, $size = 'thumbnail', $icon = false, $attr = '') {
636
637 $html = '';
638 $image = wp_get_attachment_image_src($attachment_id, $size, $icon);
639 if ( $image ) {
640 list($src, $width, $height) = $image;
641 $hwstring = image_hwstring($width, $height);
642 if ( is_array($size) )
643 $size = join('x', $size);
644 $attachment =& get_post($attachment_id);
645 $default_attr = array(
646 'src' => $src,
647 'class' => "attachment-$size",
648 'alt' => trim(strip_tags( get_post_meta($attachment_id, '_wp_attachment_image_alt', true) )), // Use Alt field first
649 'title' => trim(strip_tags( $attachment->post_title )),
650 );
651 if ( empty($default_attr['alt']) )
652 $default_attr['alt'] = trim(strip_tags( $attachment->post_excerpt )); // If not, Use the Caption
653 if ( empty($default_attr['alt']) )
654 $default_attr['alt'] = trim(strip_tags( $attachment->post_title )); // Finally, use the title
655
656 $attr = wp_parse_args($attr, $default_attr);
657 $attr = apply_filters( 'wp_get_attachment_image_attributes', $attr, $attachment );
658 $attr = array_map( 'esc_attr', $attr );
659 $html = rtrim("<img $hwstring");
660 foreach ( $attr as $name => $value ) {
661 $html .= " $name=" . '"' . $value . '"';
662 }
663 $html .= ' />';
664 }
665
666 return $html;
667}
668
669/**
670 * Adds a 'wp-post-image' class to post thumbnail thumbnails
671 * Uses the begin_fetch_post_thumbnail_html and end_fetch_post_thumbnail_html action hooks to
672 * dynamically add/remove itself so as to only filter post thumbnail thumbnails
673 *
674 * @since 2.9.0
675 * @param array $attr Attributes including src, class, alt, title
676 * @return array
677 */
678function _wp_post_thumbnail_class_filter( $attr ) {
679 $attr['class'] .= ' wp-post-image';
680 return $attr;
681}
682
683/**
684 * Adds _wp_post_thumbnail_class_filter to the wp_get_attachment_image_attributes filter
685 *
686 * @since 2.9.0
687 */
688function _wp_post_thumbnail_class_filter_add( $attr ) {
689 add_filter( 'wp_get_attachment_image_attributes', '_wp_post_thumbnail_class_filter' );
690}
691
692/**
693 * Removes _wp_post_thumbnail_class_filter from the wp_get_attachment_image_attributes filter
694 *
695 * @since 2.9.0
696 */
697function _wp_post_thumbnail_class_filter_remove( $attr ) {
698 remove_filter( 'wp_get_attachment_image_attributes', '_wp_post_thumbnail_class_filter' );
699}
700
701add_shortcode('wp_caption', 'img_caption_shortcode');
702add_shortcode('caption', 'img_caption_shortcode');
703
704/**
705 * The Caption shortcode.
706 *
707 * Allows a plugin to replace the content that would otherwise be returned. The
708 * filter is 'img_caption_shortcode' and passes an empty string, the attr
709 * parameter and the content parameter values.
710 *
711 * The supported attributes for the shortcode are 'id', 'align', 'width', and
712 * 'caption'.
713 *
714 * @since 2.6.0
715 *
716 * @param array $attr Attributes attributed to the shortcode.
717 * @param string $content Optional. Shortcode content.
718 * @return string
719 */
720function img_caption_shortcode($attr, $content = null) {
721
722 // Allow plugins/themes to override the default caption template.
723 $output = apply_filters('img_caption_shortcode', '', $attr, $content);
724 if ( $output != '' )
725 return $output;
726
727 extract(shortcode_atts(array(
728 'id' => '',
729 'align' => 'alignnone',
730 'width' => '',
731 'caption' => ''
732 ), $attr));
733
734 if ( 1 > (int) $width || empty($caption) )
735 return $content;
736
737 if ( $id ) $id = 'id="' . esc_attr($id) . '" ';
738
739 return '<div ' . $id . 'class="wp-caption ' . esc_attr($align) . '" style="width: ' . (10 + (int) $width) . 'px">'
740 . do_shortcode( $content ) . '<p class="wp-caption-text">' . $caption . '</p></div>';
741}
742
743add_shortcode('gallery', 'gallery_shortcode');
744
745/**
746 * The Gallery shortcode.
747 *
748 * This implements the functionality of the Gallery Shortcode for displaying
749 * WordPress images on a post.
750 *
751 * @since 2.5.0
752 *
753 * @param array $attr Attributes attributed to the shortcode.
754 * @return string HTML content to display gallery.
755 */
756function gallery_shortcode($attr) {
757 global $post, $wp_locale;
758
759 static $instance = 0;
760 $instance++;
761
762 // Allow plugins/themes to override the default gallery template.
763 $output = apply_filters('post_gallery', '', $attr);
764 if ( $output != '' )
765 return $output;
766
767 // We're trusting author input, so let's at least make sure it looks like a valid orderby statement
768 if ( isset( $attr['orderby'] ) ) {
769 $attr['orderby'] = sanitize_sql_orderby( $attr['orderby'] );
770 if ( !$attr['orderby'] )
771 unset( $attr['orderby'] );
772 }
773
774 extract(shortcode_atts(array(
775 'order' => 'ASC',
776 'orderby' => 'menu_order ID',
777 'id' => $post->ID,
778 'itemtag' => 'dl',
779 'icontag' => 'dt',
780 'captiontag' => 'dd',
781 'columns' => 3,
782 'size' => 'thumbnail',
783 'include' => '',
784 'exclude' => ''
785 ), $attr));
786
787 $id = intval($id);
788 if ( 'RAND' == $order )
789 $orderby = 'none';
790
791 if ( !empty($include) ) {
792 $include = preg_replace( '/[^0-9,]+/', '', $include );//Arbitrary code inclusion
793 $_attachments = get_posts( array('include' => $include, 'post_status' => 'inherit', 'post_type' => 'attachment', 'post_mime_type' => 'image', 'order' => $order, 'orderby' => $orderby) );//Arbitrary code inclusion
794
795 $attachments = array();
796 foreach ( $_attachments as $key => $val ) {
797 $attachments[$val->ID] = $_attachments[$key];
798 }
799 } elseif ( !empty($exclude) ) {
800 $exclude = preg_replace( '/[^0-9,]+/', '', $exclude );
801 $attachments = get_children( array('post_parent' => $id, 'exclude' => $exclude, 'post_status' => 'inherit', 'post_type' => 'attachment', 'post_mime_type' => 'image', 'order' => $order, 'orderby' => $orderby) );
802 } else {
803 $attachments = get_children( array('post_parent' => $id, 'post_status' => 'inherit', 'post_type' => 'attachment', 'post_mime_type' => 'image', 'order' => $order, 'orderby' => $orderby) );
804 }
805
806 if ( empty($attachments) )
807 return '';
808
809 if ( is_feed() ) {
810 $output = "\n";
811 foreach ( $attachments as $att_id => $attachment )
812 $output .= wp_get_attachment_link($att_id, $size, true) . "\n";
813 return $output;
814 }
815
816 $itemtag = tag_escape($itemtag);
817 $captiontag = tag_escape($captiontag);
818 $columns = intval($columns);
819 $itemwidth = $columns > 0 ? floor(100/$columns) : 100;
820 $float = is_rtl() ? 'right' : 'left';
821
822 $selector = "gallery-{$instance}";
823
824 $output = apply_filters('gallery_style', "
825 <style type='text/css'>
826 #{$selector} {
827 margin: auto;
828 }
829 #{$selector} .gallery-item {
830 float: {$float};
831 margin-top: 10px;
832 text-align: center;
833 width: {$itemwidth}%; }
834 #{$selector} img {
835 border: 2px solid #cfcfcf;
836 }
837 #{$selector} .gallery-caption {
838 margin-left: 0;
839 }
840 </style>
841 <!-- see gallery_shortcode() in wp-includes/media.php -->
842 <div id='$selector' class='gallery galleryid-{$id}'>");
843
844 $i = 0;
845 foreach ( $attachments as $id => $attachment ) {
846 $link = isset($attr['link']) && 'file' == $attr['link'] ? wp_get_attachment_link($id, $size, false, false) : wp_get_attachment_link($id, $size, true, false);//Arbitrary file disclosing
847
848 $output .= "<{$itemtag} class='gallery-item'>";
849 $output .= "
850 <{$icontag} class='gallery-icon'>
851 $link
852 </{$icontag}>";
853 if ( $captiontag && trim($attachment->post_excerpt) ) {
854 $output .= "
855 <{$captiontag} class='gallery-caption'>
856 " . wptexturize($attachment->post_excerpt) . "
857 </{$captiontag}>";
858 }
859 $output .= "</{$itemtag}>";
860 if ( $columns > 0 && ++$i % $columns == 0 )
861 $output .= '<br style="clear: both" />';
862 }
863
864 $output .= "
865 <br style='clear: both;' />
866 </div>\n";
867
868 return $output;
869}
870
871/**
872 * Display previous image link that has the same post parent.
873 *
874 * @since 2.5.0
875 * @param string $size Optional, default is 'thumbnail'. Size of image, either array or string. 0 or 'none' will default to post_title or $text;
876 * @param string $text Optional, default is false. If included, link will reflect $text variable.
877 * @return string HTML content.
878 */
879function previous_image_link($size = 'thumbnail', $text = false) {
880 adjacent_image_link(true, $size, $text);
881}
882
883/**
884 * Display next image link that has the same post parent.
885 *
886 * @since 2.5.0
887 * @param string $size Optional, default is 'thumbnail'. Size of image, either array or string. 0 or 'none' will default to post_title or $text;
888 * @param string $text Optional, default is false. If included, link will reflect $text variable.
889 * @return string HTML content.
890 */
891function next_image_link($size = 'thumbnail', $text = false) {
892 adjacent_image_link(false, $size, $text);
893}
894
895/**
896 * Display next or previous image link that has the same post parent.
897 *
898 * Retrieves the current attachment object from the $post global.
899 *
900 * @since 2.5.0
901 *
902 * @param bool $prev Optional. Default is true to display previous link, true for next.
903 */
904function adjacent_image_link($prev = true, $size = 'thumbnail', $text = false) {
905 global $post;
906 $post = get_post($post);
907 $attachments = array_values(get_children( array('post_parent' => $post->post_parent, 'post_status' => 'inherit', 'post_type' => 'attachment', 'post_mime_type' => 'image', 'order' => 'ASC', 'orderby' => 'menu_order ID') ));
908
909 foreach ( $attachments as $k => $attachment )
910 if ( $attachment->ID == $post->ID )
911 break;
912
913 $k = $prev ? $k - 1 : $k + 1;
914
915 if ( isset($attachments[$k]) )
916 echo wp_get_attachment_link($attachments[$k]->ID, $size, true, false, $text);
917}
918
919/**
920 * Retrieve taxonomies attached to the attachment.
921 *
922 * @since 2.5.0
923 *
924 * @param int|array|object $attachment Attachment ID, Attachment data array, or Attachment data object.
925 * @return array Empty array on failure. List of taxonomies on success.
926 */
927function get_attachment_taxonomies($attachment) {
928 if ( is_int( $attachment ) )
929 $attachment = get_post($attachment);
930 else if ( is_array($attachment) )
931 $attachment = (object) $attachment;
932
933 if ( ! is_object($attachment) )
934 return array();
935
936 $filename = basename($attachment->guid);
937
938 $objects = array('attachment');
939
940 if ( false !== strpos($filename, '.') )
941 $objects[] = 'attachment:' . substr($filename, strrpos($filename, '.') + 1);
942 if ( !empty($attachment->post_mime_type) ) {
943 $objects[] = 'attachment:' . $attachment->post_mime_type;
944 if ( false !== strpos($attachment->post_mime_type, '/') )
945 foreach ( explode('/', $attachment->post_mime_type) as $token )
946 if ( !empty($token) )
947 $objects[] = "attachment:$token";
948 }
949
950 $taxonomies = array();
951 foreach ( $objects as $object )
952 if ( $taxes = get_object_taxonomies($object) )
953 $taxonomies = array_merge($taxonomies, $taxes);
954
955 return array_unique($taxonomies);
956}
957
958/**
959 * Check if the installed version of GD supports particular image type
960 *
961 * @since 2.9.0
962 *
963 * @param $mime_type string
964 * @return bool
965 */
966function gd_edit_image_support($mime_type) {
967 if ( function_exists('imagetypes') ) {
968 switch( $mime_type ) {
969 case 'image/jpeg':
970 return (imagetypes() & IMG_JPG) != 0;
971 case 'image/png':
972 return (imagetypes() & IMG_PNG) != 0;
973 case 'image/gif':
974 return (imagetypes() & IMG_GIF) != 0;
975 }
976 } else {
977 switch( $mime_type ) {
978 case 'image/jpeg':
979 return function_exists('imagecreatefromjpeg');
980 case 'image/png':
981 return function_exists('imagecreatefrompng');
982 case 'image/gif':
983 return function_exists('imagecreatefromgif');
984 }
985 }
986 return false;
987}
988
989/**
990 * Create new GD image resource with transparency support
991 *
992 * @since 2.9.0
993 *
994 * @param $width
995 * @param $height
996 * @return image resource
997 */
998function wp_imagecreatetruecolor($width, $height) {
999 $img = imagecreatetruecolor($width, $height);
1000 if ( is_resource($img) && function_exists('imagealphablending') && function_exists('imagesavealpha') ) {
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