Inserts $with in the beginning of every new line of $input_string and returns the modified string

Parameters

$input_stringstringrequired

prepend lines in this string

$withstringrequired

prepend lines with this string

Source

public static function prepend_each_line( $input_string, $with ) {
	$lines  = explode( "\n", $input_string );
	$append = '';
	if ( "\n" === substr( $input_string, -1 ) && '' === end( $lines ) ) {
		/*
		 * Last line might be empty because $input_string was terminated
		 * with a newline, remove it from the $lines array,
		 * we'll restore state by re-terminating the string at the end.
		 */
		array_pop( $lines );
		$append = "\n";
	}
	foreach ( $lines as &$line ) {
		$line = $with . $line;
	}
	unset( $line );
	return implode( "\n", $lines ) . $append;
}

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