3v4l.org

run code in 300+ PHP versions simultaneously
<?php $b = array(0 => 1, 1 => 0); print_r($b); $a = array(); $a[$b[1]] = array(); echo print_r($a);
Output for 5.4.0 - 5.4.17
Parse error: syntax error, unexpected ' ' (T_STRING) in /in/X5C1t on line 5
Process exited with code 255.
Output for 5.3.0 - 5.3.27
Parse error: syntax error, unexpected T_STRING in /in/X5C1t on line 5
Process exited with code 255.
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170.69 ms | 1395 KiB | 53 Q