我的数组是:
$array= array(4,3,4,3,1,2,1);
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我想输出如下:
Output = 2
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(因为 2 只出现一次)
这是我尝试过的:
$array = array(4, 3, 4, 3, 1, 2, 1);
$array1 = array(4, 3, 4, 3, 1, 2, 1);
$array_diff = array_diff($array, $array1);
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