3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $times = 10000; $var = null; $var = new stdClass(); $time1 = microtime(true); for ($i = 0; $i <= $times; $i++) { if ($var instanceof stdClass) {} } $time1 = microtime(true) - $time1; //echo "Time using '!': $time1\n"; $time2 = microtime(true); for ($i = 0; $i <= $times; $i++) { if ($var !== null) {} } $time2 = microtime(true) - $time2; //echo "Time using '===': $time2\n"; if ($time1 > $time2){ $p = (($time1-$time2)/$time2) * 100; //printf("'!== null' was faster by %.2f percent.", $p); printf("'!== null' was faster"); } else { $p = (($time2-$time1)/$time1) * 100; //printf("'instanceof' was faster by %.2f percent.", $p); printf("'instanceof' was faster"); }
Output for 5.0.0 - 5.0.1, 5.0.3 - 5.4.36, 5.4.38 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.1 - 7.1.0
'!== null' was faster
Output for 5.0.2, 5.4.37, 7.0.0
'instanceof' was faster
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING in /in/Wq4dA on line 11
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected T_STRING in /in/Wq4dA on line 11
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/Wq4dA on line 11
Process exited with code 255.