3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = [10,20,30,40,50,60]; $k = end($a); $k = prev($a); var_dump($k); unset($a[$key]); var_dump($a);
Output for 5.4.0 - 7.2.0
int(50) Notice: Undefined variable: key in /in/43NOY on line 11 array(6) { [0]=> int(10) [1]=> int(20) [2]=> int(30) [3]=> int(40) [4]=> int(50) [5]=> int(60) }
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/43NOY on line 3
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 '[' in /in/43NOY on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/43NOY on line 3
Process exited with code 255.