3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = "Foo"; function testIt ($b){ $b = "Yay!"; } testIt(&$a); print "$a\n";
Output for 5.4.0 - 5.4.30
Fatal error: Call-time pass-by-reference has been removed; If you would like to pass argument by reference, modify the declaration of testIt(). in /in/rWXg1 on line 8
Process exited with code 255.
Output for 5.3.0 - 5.3.29
Deprecated: Call-time pass-by-reference has been deprecated; If you would like to pass it by reference, modify the declaration of testIt(). If you would like to enable call-time pass-by-reference, you can set allow_call_time_pass_reference to true in your INI file in /in/rWXg1 on line 8 Yay!
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188.49 ms | 1395 KiB | 68 Q