3v4l.org

run code in 300+ PHP versions simultaneously
<?php interface TestInterface {} class TestClass implements TestInterface {} $time = time(); for ($i = 0; $i < 1000000; $i++) { is_a('TestClass', 'TestInterface', true); } var_dump('is_a time: ' . time() - $time);
Output for 7.1.0 - 7.1.20, 7.2.0 - 7.2.6
Warning: A non-numeric value encountered in /in/as5dD on line 10 int(-1430841738)
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20
int(-1430841738)
preferences:
110.42 ms | 402 KiB | 136 Q