3v4l.org

run code in 300+ PHP versions simultaneously
<?php $_2 = 1; echo $_{++1};
Output for 5.4.0 - 5.4.30
Parse error: syntax error, unexpected '1' (T_LNUMBER) in /in/kpAoH on line 3
Process exited with code 255.
Output for 5.3.0 - 5.3.28
Parse error: syntax error, unexpected T_LNUMBER in /in/kpAoH on line 3
Process exited with code 255.
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183.29 ms | 1395 KiB | 67 Q