Ticket #16830: ticket-16830-refresh-2015-09-02.diff

wp-includes/rewrite-functions.php

@@ -317 +317 @@
                 if ( $id )
                         return $id;
         }
+        /**
+         * Check if we are working with an image file
+         */
+        if ( preg_match( '#^https?://.*?(?:png|jpg|jpeg|gif)$#ui', $url ) ) {
+
+                /**
+                 * Okay, let's look to see if it's an attachment. Gotta get the upload dir's baseurl
+                 * to strip off the protocal, domain and root paths because attachments are not stored
+                 * as full urls but instead (typically) stored using yyy/mm/filename.ext" format.
+                 */
+                $upload_dir = wp_upload_dir();
+
+                /**
+                 * Get the path or the original size image by slicing the base image url off the front
+                 * and "-{$width}x{$height}" off the end, and adding the extension back.
+                 */
+                $regex = preg_quote( $upload_dir[ 'baseurl' ] ) . '/(.*?)\-\d+x\d+(\.(png|jpg|jpeg|gif))';
+                $filepath = preg_replace( "#^{$regex}$#i", "$1$2", $url );
+
+                /**
+                 * Look up the image in the metadata to see if it is attached
+                 */
+                global $wpdb;
+
+                if ( $id = (int) $wpdb->get_var( $wpdb->prepare( "SELECT post_id FROM {$wpdb->postmeta} WHERE meta_value='%s'", $filepath ) ) ) {
+                        return $id;
+                }
+
+                /**
+                 * Hmmph. Didn't find anything. No clue what the ID is then.
+                 */
+                return 0;
+
+        }
 
         // Check to see if we are using rewrite rules
         $rewrite = $wp_rewrite->wp_rewrite_rules();