3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump( [ 'array_syntax' => true, 'array_syntax' => false, ], [ 'array_syntax' => false, 'array_syntax' => true, ] );
Output for 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
array(1) { ["array_syntax"]=> bool(false) } array(1) { ["array_syntax"]=> bool(true) }
preferences:
51.24 ms | 842 KiB | 4 Q