3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = array(array( 'Buenos Aires' => 'Salto') => 1); print_r($a);
Output for 4.3.9 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.36, 5.6.0 - 5.6.28
Warning: Illegal offset type in /in/L32vF on line 3 Array ( )
Output for 4.3.0 - 4.3.8
Array ( )
preferences:
262.03 ms | 1395 KiB | 195 Q