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<?php function treeArray($data) { $result = array(); $p = array(); foreach($data as $val) { if($val['pid'] == 0) { $i = count($result); $result[$i] = isset($p[$val['id']])? array_merge($val,$p[$val['id']]) : $val; $p[$val['id']] = & $result[$i]; } else { $i = count($p[$val['pid']]['children']); $p[$val['pid']]['children'][$i] = $val; $p[$val['id']] = & $p[$val['pid']]['children'][$i]; } } return $result; } $data = array(array('id'=>1,'pid'=>'0','name'=>'11111'), array('id'=>2,'pid'=>'1','name'=>'22222'), array('id'=>3,'pid'=>'0','name'=>'33333'), array('id'=>4,'pid'=>'3','name'=>'44444'), array('id'=>5,'pid'=>'4','name'=>'55555'), array('id'=>6,'pid'=>'1','name'=>'66666')); print_r(treeArray($data));
Output for 5.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
Notice: Undefined index: children in /in/KMZIV on line 16 Notice: Undefined index: children in /in/KMZIV on line 16 Notice: Undefined index: children in /in/KMZIV on line 16 Array ( [0] => Array ( [id] => 1 [pid] => 0 [name] => 11111 [children] => Array ( [0] => Array ( [id] => 2 [pid] => 1 [name] => 22222 ) [1] => Array ( [id] => 6 [pid] => 1 [name] => 66666 ) ) ) [1] => Array ( [id] => 3 [pid] => 0 [name] => 33333 [children] => Array ( [0] => Array ( [id] => 4 [pid] => 3 [name] => 44444 [children] => Array ( [0] => Array ( [id] => 5 [pid] => 4 [name] => 55555 ) ) ) ) ) )
Output for 4.3.0 - 5.2.17
Notice: Undefined index: children in /in/KMZIV on line 16 Notice: Undefined index: children in /in/KMZIV on line 16 Notice: Undefined index: children in /in/KMZIV on line 16 Array ( [0] => Array ( [id] => 1 [pid] => 0 [name] => 11111 [children] => Array ( [0] => Array ( [id] => 2 [pid] => 1 [name] => 22222 ) [1] => Array ( [id] => 6 [pid] => 1 [name] => 66666 ) ) ) [1] => Array ( [id] => 3 [pid] => 0 [name] => 33333 [children] => Array ( [0] => Array ( [id] => 4 [pid] => 3 [name] => 44444 [children] => Array ( [0] => Array ( [id] => 5 [pid] => 4 [name] => 55555 ) ) ) ) ) )