WP_Image_Editor_GD::_resize( int $max_w, int $max_h, bool|array $crop = false ): resource|GdImage|WP_Error

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Image cropping behavior. If false, the image will be scaled (default).
If true, image will be cropped to the specified dimensions using center positions.
If an array, the image will be cropped using the array to specify the crop location:
  • string
    The x crop position. Accepts 'left' 'center', or 'right'.
  • 1 string
    The y crop position. Accepts 'top', 'center', or 'bottom'.





protected function _resize( $max_w, $max_h, $crop = false ) {
	$dims = image_resize_dimensions( $this->size['width'], $this->size['height'], $max_w, $max_h, $crop );

	if ( ! $dims ) {
		return new WP_Error( 'error_getting_dimensions', __( 'Could not calculate resized image dimensions' ), $this->file );

	list( $dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h ) = $dims;

	$resized = wp_imagecreatetruecolor( $dst_w, $dst_h );
	imagecopyresampled( $resized, $this->image, $dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h );

	if ( is_gd_image( $resized ) ) {
		$this->update_size( $dst_w, $dst_h );
		return $resized;

	return new WP_Error( 'image_resize_error', __( 'Image resize failed.' ), $this->file );

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