3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array = [ 'a' => ['id' => 20, 'name' => 'chimpanzee'], 'b' => ['id' => 40, 'name' => 'meeting'], 'c' => ['id' => 20, 'name' => 'dynasty'], 'd' => ['id' => 50, 'name' => 'chocolate'], 'e' => ['id' => 10, 'name' => 'bananas'], 'f' => ['id' => 50, 'name' => 'fantasy'], 'g' => ['id' => 50, 'name' => 'football'] ]; asort($array); var_export( array_reduce( array_keys($array), function($result, $k) use ($array) { $result[$array[$k]['id']][$k] = $array[$k]; return $result; } ) );
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
array ( 10 => array ( 'e' => array ( 'id' => 10, 'name' => 'bananas', ), ), 20 => array ( 'a' => array ( 'id' => 20, 'name' => 'chimpanzee', ), 'c' => array ( 'id' => 20, 'name' => 'dynasty', ), ), 40 => array ( 'b' => array ( 'id' => 40, 'name' => 'meeting', ), ), 50 => array ( 'd' => array ( 'id' => 50, 'name' => 'chocolate', ), 'f' => array ( 'id' => 50, 'name' => 'fantasy', ), 'g' => array ( 'id' => 50, 'name' => 'football', ), ), )
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/7hEGN on line 3
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 '[' in /in/7hEGN on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/7hEGN on line 3
Process exited with code 255.

preferences:
105.51 ms | 410 KiB | 5 Q