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During development, you may encounter the need to compare the difference between two arrays. So how to use PHP to achieve this? In fact, PHP provides us with such a function: array_diff. Let’s take a look at how to use it.
Commonly used PHP compares the difference between two arrays
array_diff($arr, $arr1);
//比较数组差异 $arr = [1,2,3,4]; $arr1 = [1,2,3]; $diff = array_diff($arr, $arr1); dump($diff); //打印输出如下,函数第二个参数为参数值,没有差异则返回空数组 array(1) { [3] => int(4) }
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