3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function isCorrect($string) { $len = strlen($string); $stack = []; for( $i = 0; $i < $len; ++$i) { if ($string[$i] == '(') array_push($stack, $string[$i]); else if($string[$i] == ')') { if ( empty($stack) === false) array_pop($stack); else return false; } } return empty($stack); } $string = '((()))'; isCorrect($string); //var_dump(isCorrect($string)); //var_dump(strlen($string) % 2); //assert(isCorrect('') === true); //assert(isCorrect('()') === true); //assert(isCorrect('{()}') === true); //assert(isCorrect('{()}{}') === true); //assert(isCorrect('(())') === true); //assert(isCorrect('{({({({()})})})}') === true); //assert(isCorrect('{(})') === false);
based on G96HY
Output for 5.4.0 - 7.1.0
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/uAXEd on line 4
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/uAXEd on line 4
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/uAXEd on line 4
Process exited with code 255.