3v4l.org

run code in 300+ PHP versions simultaneously
<?php function &test() { echo "hi"; } test(); echo '<br>'; &test();
Output for 5.3.0 - 5.3.22, 5.4.0 - 5.4.12
Parse error: syntax error, unexpected '&' in gcEmW on line 7
Process exited with code 255.
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172.98 ms | 1395 KiB | 43 Q