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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]; } } 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 4.3.0 - 7.1.0
Array ( [0] => Array ( [id] => 1 [pid] => 0 [name] => 11111 ) [1] => Array ( [id] => 3 [pid] => 0 [name] => 33333 ) )