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run code in 300+ PHP versions simultaneously
<?php function usage() { if (function_exists('memory_get_usage')) { return memory_get_usage(true); } else { return '?'; } } echo usage()."\n"; $x = '.'; $a = ''; for ($i=0;$i<1000;$i++) $a = "$a$x"; echo usage()."\n"; unset($a,$x); echo usage()."\n";
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.13, 7.3.0 - 7.3.1
2097152 2097152 2097152
Output for 5.2.1 - 5.2.17, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28
262144 262144 262144
Output for 5.3.0 - 5.3.29
786432 786432 786432
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
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preferences:
153.86 ms | 402 KiB | 234 Q