wp_text_diff

Source code

function wp_text_diff( $left_string, $right_string, $args = null ) {

	$defaults = array( 'title' => '', 'title_left' => '', 'title_right' => '' );

	$args = wp_parse_args( $args, $defaults );



	if ( !class_exists( 'WP_Text_Diff_Renderer_Table' ) )

		require( ABSPATH . WPINC . '/wp-diff.php' );



	$left_string  = normalize_whitespace($left_string);

	$right_string = normalize_whitespace($right_string);



	$left_lines  = split("\n", $left_string);

	$right_lines = split("\n", $right_string);



	$text_diff = new Text_Diff($left_lines, $right_lines);

	$renderer  = new WP_Text_Diff_Renderer_Table();

	$diff = $renderer->render($text_diff);



	if ( !$diff )

		return '';



	$r  = "<table class='diff'>\n";

	$r .= "<col class='ltype' /><col class='content' /><col class='ltype' /><col class='content' />";



	if ( $args['title'] || $args['title_left'] || $args['title_right'] )

		$r .= "<thead>";

	if ( $args['title'] )

		$r .= "<tr class='diff-title'><th colspan='4'>$args[title]</th></tr>\n";

	if ( $args['title_left'] || $args['title_right'] ) {

		$r .= "<tr class='diff-sub-title'>\n";

		$r .= "\t<td></td><th>$args[title_left]</th>\n";

		$r .= "\t<td></td><th>$args[title_right]</th>\n";

		$r .= "</tr>\n";

	}

	if ( $args['title'] || $args['title_left'] || $args['title_right'] )

		$r .= "</thead>\n";



	$r .= "<tbody>\n$diff\n</tbody>\n";

	$r .= "</table>";



	return $r;

}