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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )
apply_filters( "hook_name", "what_to_filter" )
.Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
Line | Code |
---|---|
202 |
|
203 | if ( $filepath && file_exists($filepath) ) { |
204 | if ( 'full' != $size && ( $data = image_get_intermediate_size($post_id, $size) ) ) { |
205 | $filepath = apply_filters('load_image_to_edit_filesystempath', path_join( dirname($filepath), $data['file'] ), $post_id, $size); |
206 | } |
207 | } elseif ( function_exists('fopen') && function_exists('ini_get') && true == ini_get('allow_url_fopen') ) { |
208 | $filepath = apply_filters('load_image_to_edit_attachmenturl', wp_get_attachment_url($post_id) , $post_id, $size); |
209 | } |
210 |
|
211 | $filepath = apply_filters('load_image_to_edit_path', $filepath, $post_id, $size); |
212 | if ( empty($filepath) ) |
213 | return false; |
214 |
|
215 | switch ( $mime_type ) { |
216 | case 'image/jpeg': |
217 | $image = imagecreatefromjpeg($filepath); |
218 | break; |
219 | case 'image/png': |
220 | $image = imagecreatefrompng($filepath); |