How to remove identical elements from two arrays in php

In PHP, you can use the array_diff() function to remove the same elements from two arrays. The syntax format is "array_diff(array1,array2);"; this function is used to compare the values ​​of two arrays and can return A difference array containing all values ​​in array1 but not in array2.

The operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

php removes two identical arrays Element

can use the array_diff() function, the code example is as follows:

<?php
header("Content-type:text/html;charset=utf-8");
$a=array(1,2,3);
$b=array(2,3,4);
//得到存在于$a但不存在于$b中的元素组成的数组
$c1=array_diff($a,$b);
//得到存在于$b但不存在于$a中的元素组成的数组
$c2=array_diff($b,$a);
//去除相同元素后的两个数组
echo &#39;去除相同元素后的两个数组：&#39;.&#39;<br>&#39;;
var_dump($c1);
var_dump($c2);
?>

Output:

去除相同元素后的两个数组：
array (size=1)
  0 => int 1
array (size=1)
  2 => int 4

Explanation:

array_diff() function is used to compare the values ​​of two (or more) arrays and return the difference.

Syntax

array_diff(array1,array2,array3...);

Parameters	Description
array1	Required. The first array to compare with other arrays.
array2	Required. The array to compare to the first array.
array3,...	Optional. Additional array to compare with the first array.

array_diff() compares the values ​​of two (or more) arrays (value in key=>value) and returns a difference array; difference set The array includes all values ​​that are in the array being compared (array1) but not in any of the other parameter arrays (array2 or array3, etc.).

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