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run code in 300+ PHP versions simultaneously
<?php function foo(&$param) { $param = 42; return $param; } $a = 23; echo "\$a before calling foo(): $a\n"; $b = foo($a); echo "\$a after the call to foo(): $a\n"; $b = 23; echo "\$a after touching the returned variable: $a\n"; echo "\$b : $b\n";
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, 5.5.24 - 5.5.35, 5.6.7 - 5.6.21, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 7.2.0 - 7.2.33, 7.3.12 - 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
$a before calling foo(): 23 $a after the call to foo(): 42 $a after touching the returned variable: 42 $b : 23
preferences:
207.32 ms | 406 KiB | 313 Q