php json数组及in_array的问题 急答:<?a = '[{"rid":"14455764", "childIds":"14455828,14455840,14455870,14455912"},{"rid":"14455926", "childIds":"14456302,15337576,16899896,30775122"}]';b = json_decode($a,true);c = array();foreach($b as $v){ array_push($c,$v['childIds']);} echo implode(",",$c...