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
206           $image = apply_filters('image_editor_save_pre', $image, $post_id);
207
208           if ( is_wp_error( $image->stream( $mime_type ) ) )
209                return false;
210
211           return true;
212      } else {
213           _deprecated_argument( __FUNCTION__, '3.5', __( '$image needs to be an WP_Image_Editor object' ) );
214
215           $image = apply_filters('image_save_pre', $image, $post_id);
216
217           switch ( $mime_type ) {
218                case 'image/jpeg':
219                     header( 'Content-Type: image/jpeg' );
220                     return imagejpeg( $image, null, 90 );
221                case 'image/png':
222                     header( 'Content-Type: image/png' );
223                     return imagepng( $image );
224                case 'image/gif':
 
Line Code
245           $saved = apply_filters('wp_save_image_editor_file', null, $filename, $image, $mime_type, $post_id);
246
247           if ( null !== $saved )
248                return $saved;
249
250           return $image->save( $filename, $mime_type );
251      } else {
252           _deprecated_argument( __FUNCTION__, '3.5', __( '$image needs to be an WP_Image_Editor object' ) );
253
254           $image = apply_filters('image_save_pre', $image, $post_id);
255           $saved = apply_filters('wp_save_image_file', null, $filename, $image, $mime_type, $post_id);
256
257           if ( null !== $saved )
258                return $saved;
259
260           switch ( $mime_type ) {
261                case 'image/jpeg':
262                     /** This filter is documented in wp-includes/class-wp-image-editor.php */
263                     return imagejpeg( $image, $filename, apply_filters( 'jpeg_quality', 90, 'edit_image' ) );