How to determine if two arrays have the same value in php

Method: 1. Use array_intersect() to compare the values ​​of two arrays. The syntax "array_intersect(array 1, array 2)" will return an intersection array; 2. Determine whether the intersection array is empty. The syntax " Intersection array == []", if it is empty, it does not have the same value, if it is not empty, it has the same value.

The operating environment of this tutorial: windows7 system, PHP8.1 version, DELL G3 computer

php determines two Whether the arrays have the same value

1. Use the array_intersect() function to compare two arrays and obtain the intersection elements

array_intersect() function is used Compares the values ​​of two (or more) arrays and returns an intersection array.

• If the two arrays have the same value, then there are elements in the intersection array, not an empty array

• If the two arrays do not have the same value, Then there are no elements in the intersection array and it is an empty array

<?php
header("Content-type:text/html;charset=utf-8");
$arr1=array(1,2,3,4,5);
$arr2=array(2,4,6,8,10);
$arr3=array(1,3,5,7,9);
echo "数组1和数组2的交集：<br>";
$intersect=array_intersect($arr1,$arr2);
var_dump($intersect);

echo "数组2和数组3的交集：<br>";
$intersect=array_intersect($arr3,$arr2);
var_dump($intersect);
?>

2. Determine whether the intersection array is an empty array

• If it is an empty array, the two arrays do not have the same value

• If it is not an empty array, the two arrays have the same value

echo "数组1和数组2的交集：<br>";
$intersect=array_intersect($arr1,$arr2);
var_dump($intersect);
if($intersect==[]){
	echo "两个数组没有相同值<br><br><br>";
}else{
	echo "两个数组有相同值<br><br><br>";
}


echo "数组2和数组3的交集：<br>";
$intersect=array_intersect($arr3,$arr2);
var_dump($intersect);
if($intersect==[]){
	echo "两个数组没有相同值<br>";
}else{
	echo "两个数组有相同值<br>";
}

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