3v4l.org

run code in 300+ PHP versions simultaneously
<?php $bar = 'baz'; define('FOO', &$bar); var_dump(FOO); $bar = 'quux'; var_dump(FOO);
Output for 5.4.0 - 5.4.19
Fatal error: Call-time pass-by-reference has been removed in /in/6KHXe on line 3
Process exited with code 255.
Output for 5.3.28 - 5.3.29
Deprecated: Call-time pass-by-reference has been deprecated in /in/aqCJF on line 3 string(3) "baz" string(3) "baz"
Output for 5.3.0 - 5.3.27
Deprecated: Call-time pass-by-reference has been deprecated in /in/6KHXe on line 3 string(3) "baz" string(3) "baz"
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185.16 ms | 1395 KiB | 57 Q