3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = array[]; $a[] = 'a'; $a[] = 'b'; implode("','", $a); print $a;
Output for 5.3.0 - 5.3.18, 5.4.0 - 5.4.8
Parse error: syntax error, unexpected '[', expecting '(' in /in/K5In3 on line 2
Process exited with code 255.
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179.61 ms | 1395 KiB | 35 Q