3v4l.org

run code in 300+ PHP versions simultaneously
<?php function foo($s) { return strtoupper(trim($s)); } function bar($s) { $s = trim($s); $s = strtoupper($s); return $s; } $x = " Hello! "; var_dump(foo($x)); var_dump(bar($x));
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.38, 7.0.0 - 7.0.33, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
string(6) "HELLO!" string(6) "HELLO!"
preferences:
271.25 ms | 406 KiB | 425 Q