3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function isCorrect($string) { for( $i = 0; $i < strlen($string); $i++) { $string; } } $string = '({{}})'; var_dump(substr($string, 0, 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 M7Y9i
Output for 4.3.0 - 5.0.5, 5.1.1 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
string(3) "({{"
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.1.0
Fatal error: fatal flex scanner internal error--end of buffer missed in /in/SIjf7 on line 15
Process exited with code 255.