3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = ['i' => 'a']; var_dump($a['i'] ?: 'empty'); var_dump($a['i'] ?? 'empty'); var_dump($a['j'] ?: 'empty'); var_dump($a['j'] ?? 'empty'); var_dump($a['j'] ?? $a['i'] ?: 'empty');
based on ahK7Y
Output for 7.0.0 - 7.2.0
string(1) "a" string(1) "a" Notice: Undefined index: j in /in/A0kJ6 on line 7 string(5) "empty" string(5) "empty" string(1) "a"
Output for 5.4.10 - 5.6.28
Parse error: syntax error, unexpected '?' in /in/A0kJ6 on line 6
Process exited with code 255.
Output for 5.3.20 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/A0kJ6 on line 3
Process exited with code 255.