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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.
This hook occurs 4 times in this file.
| Line | Code |
|---|---|
| 4185 | do_action( 'deleted_post', $post_id ); |
| 4186 | |
| 4187 | $uploadpath = wp_upload_dir(); |
| 4188 | |
| 4189 | if ( ! empty($meta['thumb']) ) { |
| 4190 | // Don't delete the thumb if another attachment uses it |
| 4191 | if (! $wpdb->get_row( $wpdb->prepare( "SELECT meta_id FROM $wpdb->postmeta WHERE meta_key = '_wp_attachment_metadata' AND meta_value LIKE %s AND post_id <> %d", '%' . $meta['thumb'] . '%', $post_id)) ) { |
| 4192 | $thumbfile = str_replace(basename($file), $meta['thumb'], $file); |
| 4193 | /** This filter is documented in wp-admin/custom-header.php */ |
| 4194 | $thumbfile = apply_filters('wp_delete_file', $thumbfile); |
| 4195 | @ unlink( path_join($uploadpath['basedir'], $thumbfile) ); |
| 4196 | } |
| 4197 | } |
| 4198 | |
| 4199 | // remove intermediate and backup images if there are any |
| 4200 | foreach ( $intermediate_sizes as $intermediate ) { |
| 4201 | /** This filter is documented in wp-admin/custom-header.php */ |
| 4202 | $intermediate_file = apply_filters( 'wp_delete_file', $intermediate['path'] ); |
| 4203 | @ unlink( path_join($uploadpath['basedir'], $intermediate_file) ); |
| 4204 | } |
| 4205 | |
| 4206 | if ( is_array($backup_sizes) ) { |
| 4207 | foreach ( $backup_sizes as $size ) { |
| 4208 | $del_file = path_join( dirname($meta['file']), $size['file'] ); |
| 4209 | /** This filter is documented in wp-admin/custom-header.php */ |
| 4210 | $del_file = apply_filters('wp_delete_file', $del_file); |
| 4211 | @ unlink( path_join($uploadpath['basedir'], $del_file) ); |
| 4212 | } |
| 4213 | } |
| 4214 | |
| 4215 | /** This filter is documented in wp-admin/custom-header.php */ |
| 4216 | $file = apply_filters('wp_delete_file', $file); |
| 4217 | |
| 4218 | if ( ! empty($file) ) |
| 4219 | @ unlink($file); |
| 4220 | |
| 4221 | clean_post_cache( $post ); |
| 4222 | |
| 4223 | return $post; |
| 4224 | } |
| 4225 | |