3v4l.org

run code in 300+ PHP versions simultaneously
<?php $i=1; while($1=<5) { echo "The number is " . $i . "<br />" $i++ } ?>
Output for 5.4.0 - 5.4.8
Parse error: syntax error, unexpected '1' (T_LNUMBER), expecting variable (T_VARIABLE) or '$' in U8KIk on line 4
Process exited with code 255.
Output for 5.3.0 - 5.3.18
Parse error: syntax error, unexpected T_LNUMBER, expecting T_VARIABLE or '$' in U8KIk on line 4
Process exited with code 255.
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168.53 ms | 1395 KiB | 35 Q