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...);

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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