[ [ "pit", "28" "id011" ], [ "john", "34", "id023" ], [ "bob", "24", "id011" ], [ "marry", "23", "id032" ] ] $tmp = array(); $array_result = array(); foreach( $array_org as $key => $value ){ // 配列に値が見つからなければ$tmpに格納 if( !in_array( $value['id'], $tmp ) ) { $tmp[] = $value['id']; $array_result[] = $value; } } $data = $array_result; Register as a new user and use Qiita more conveniently You get articl