3v4l.org

run code in 300+ PHP versions simultaneously
<?php function build_sorter($key) { return function ($a, $b) use ($key) { if ($a[$key] == $b[$key]) { return 0; } return ($a[$key] < $b[$key]) ? -1 : 1; }; } $array = array('123' => array('1'=> 2, 'balance_USD' => -1), '12' => array('1'=> 2, 'balance_USD' => 12),); usort($array, $this->build_sorter('balance_USD')); var_dump($array);
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Uncaught Error: Using $this when not in object context in /in/SKJMm:12 Stack trace: #0 {main} thrown in /in/SKJMm on line 12
Process exited with code 255.
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28
Fatal error: Using $this when not in object context in /in/SKJMm on line 12
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/SKJMm on line 4
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_FUNCTION in /in/SKJMm on line 4
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/SKJMm on line 4
Process exited with code 255.
preferences:
235.86 ms | 401 KiB | 315 Q