判斷兩個數組的值是否同樣

<?php 

//判斷兩個數組的值是否同樣 
 $a = [1,2,3];
 $b = [2,1,3];
 $c = [1,2];
 $d = [1,2,4];
 $f = [1,2,3,4];
 
 var_dump($a == $b); //false

 var_dump(array_diff($a, $b)); //empty
 var_dump(array_diff($a, $c)); //[2 => 3]
 var_dump(array_diff($a, $f)); //empty  不能夠
 var_dump(array_diff($f, $a)); // [3 => 4]

//方法1 排序後比較
sort($a);
sort($b);
var_dump($a == $b); //true

 $a = [1,2,3];
 $b = [2,1,3];
 $c = [1,2];
 $d = [1,2,4];
 $f = [1,2,3,4];
 // 方法2 arrar_diff
 var_dump(array_diff($a, $b) || array_diff($b, $a)); //false
 var_dump(array_diff($a, $f) || array_diff($f, $a)); //true