3v4l.org

run code in 300+ PHP versions simultaneously
<?php $2 = 1; echo $+1;
Output for 5.4.0 - 5.4.30
Parse error: syntax error, unexpected '2' (T_LNUMBER), expecting variable (T_VARIABLE) or '$' in /in/koWDD on line 2
Process exited with code 255.
Output for 5.3.0 - 5.3.28
Parse error: syntax error, unexpected T_LNUMBER, expecting T_VARIABLE or '$' in /in/koWDD on line 2
Process exited with code 255.
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204.05 ms | 1399 KiB | 67 Q