3v4l.org

run code in 300+ PHP versions simultaneously
<?php $t1 = 12; $t2 = '12'; $t3 = 'xcz12'; var_dump(is_int((int)$t1)); var_dump(is_int((int)$t2)); var_dump(is_int((int)$t3));

preferences:
36.5 ms | 402 KiB | 5 Q