wp_crop_image

Source code

function wp_crop_image( $src_file, $src_x, $src_y, $src_w, $src_h, $dst_w, $dst_h, $src_abs = false, $dst_file = false ) {

	if ( is_numeric( $src_file ) ) // Handle int as attachment ID

		$src_file = get_attached_file( $src_file );



	$src = wp_load_image( $src_file );



	if ( !is_resource( $src ) )

		return new WP_Error( 'error_loading_image', $src, $src_file );



	$dst = wp_imagecreatetruecolor( $dst_w, $dst_h );



	if ( $src_abs ) {

		$src_w -= $src_x;

		$src_h -= $src_y;

	}



	if (function_exists('imageantialias'))

		imageantialias( $dst, true );



	imagecopyresampled( $dst, $src, 0, 0, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h );



	imagedestroy( $src ); // Free up memory



	if ( ! $dst_file )

		$dst_file = str_replace( basename( $src_file ), 'cropped-' . basename( $src_file ), $src_file );



	$dst_file = preg_replace( '/\\.[^\\.]+$/', '.jpg', $dst_file );



	if ( imagejpeg( $dst, $dst_file, apply_filters( 'jpeg_quality', 90, 'wp_crop_image' ) ) )

		return $dst_file;

	else

		return false;

}