Source View: image_save_pre

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Understanding Source Code

The best way to understand what a hook does is to look at where it occurs in the source code.

  • Action hooks look like this: do_action( "hook_name" )
  • Filter hooks look like this: 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.

Source View

This hook occurs 2 times in this file.

Line Code
230           /**
231            * Filter the GD image resource to be streamed to the browser.
232            *
233            * @since 2.9.0
234            * @deprecated 3.5.0 Use image_editor_save_pre instead.
235            *
236            * @param resource $image   Image resource to be streamed.
237            * @param int      $post_id Post ID.
238            */
239           $image = apply_filters( 'image_save_pre', $image, $post_id );
240
241           switch ( $mime_type ) {
242                case 'image/jpeg':
243                     header( 'Content-Type: image/jpeg' );
244                     return imagejpeg( $image, null, 90 );
245                case 'image/png':
246                     header( 'Content-Type: image/png' );
247                     return imagepng( $image );
248                case 'image/gif':
 
Line Code
287
288           if ( null !== $saved )
289                return $saved;
290
291           return $image->save( $filename, $mime_type );
292      } else {
293           _deprecated_argument( __FUNCTION__, '3.5', __( '$image needs to be an WP_Image_Editor object' ) );
294
295           /** This filter is documented in wp-admin/includes/image-edit.php */
296           $image = apply_filters( 'image_save_pre', $image, $post_id );
297
298           /**
299            * Filter whether to skip saving the image file.
300            *
301            * Returning a non-null value will short-circuit the save method,
302            * returning that value instead.
303            *
304            * @since 2.9.0
305            * @deprecated 3.5.0 Use wp_save_image_editor_file instead.