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run code in 150+ php & hhvm versions
Bugs & Features
<?php class aa implements ArrayAccess { protected $_data = array(); public function offsetGet($key) { return $this->_data[$key]; } public function offsetSet($key, $value) { $this->_data[$key] = $value; } public function offsetExists($key) { return isset($this->_data[$key]); } public function offsetUnset($key) { unset($this->_data[$key]); } } $a = new aa; $a['name'] = 'Dżozef'; $a['id'] = 5; $b = array(); $b[0] = $a; var_dump(array_column($b, null, 'id'));
Output for 7.0.0 - 7.1.0
array(1) { [0]=> object(aa)#1 (1) { ["_data":protected]=> array(2) { ["name"]=> string(7) "Dżozef" ["id"]=> int(5) } } }
Output for 5.5.24 - 5.6.28, hhvm-3.12.0
array(0) { }
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.0.0 - 5.4.45
Fatal error: Call to undefined function array_column() in /in/qgRbp on line 31
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting '{' in /in/qgRbp on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected T_STRING, expecting '{' in /in/qgRbp on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `'{'' in /in/qgRbp on line 3
Process exited with code 255.