3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $result1 = array_keys(['id' => 1]); // ['id'] $result2 = array_keys(['id' => 1], null); // [] $expected = ['id']; echo $expected === $result1 ? 1 : 0; // 1 true echo $expected === $result2 ? 1 : 0; // 0 false
Output for 5.4.0 - 7.1.7
10
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[', expecting ')' in /in/69EUT on line 2
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[', expecting ')' in /in/69EUT on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/69EUT on line 2
Process exited with code 255.