一個數組按照另一個數組排序方法

$a1 = array(10,8,9,7,5);

$a2 = array(array(8,'X','ddd','ssss'),array(10,'XX','aa'),array(9,'XXX','aaaaa'),array(5,'tt'),array(7,'cc'));

 

foreach($a2 as $k=>$v){

$a3[$v[0]] = $v;

}

foreach($a1 as $k=>$key){

$a5[$k] = $a3[$key];

}

print_r($a5);