PHP method to implement association table based on array function

This article mainly introduces the editing operations of association tables in PHP based on array functions, involving the related usage skills of PHP array comparison functions array_intersect and array_diff. Friends in need can refer to the following

The details are as follows:

$arr1 = array(1, 2, 4, 5, 6, 9); // 学校应用关联表中一开始的数据
$arr2 = array(3, 4, 5, 7, 8);  // 前台更新的数据
/*
两个数组相同的元素，提取不变的元素
Array
(
  [2] => 4
  [3] => 5
)
*/
$arr3 = array_intersect($arr1, $arr2);
print_r($arr3);
/*
两个数组不同的元素，需要删除的
Array
(
  [0] => 1
  [1] => 2
  [4] => 6
  [5] => 9
)
*/
$arr4 = array_diff($arr1, $arr3);
print_r($arr4);
/*
两个数组不同的元素，需要添加的
Array
(
  [0] => 3
  [3] => 7
  [4] => 8
)
*/
$arr5 = array_diff($arr2, $arr3);
print_r($arr5);

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