How to delete associative array in php

php method to delete an associative array: first create a PHP sample file; then define an array and add elements; finally use the unset function to delete the array.

phpAdd and delete associative arrays

The example is as follows:

<?php
//定义一个数组
$arr = array();
 
//添加元素
$arr[&#39;name&#39;]=&#39;baiduzhidao&#39;;
$arr[&#39;url&#39;]=&#39;baiduzhidaocom&#39;;
 
//删除某个元素
unset($arr[&#39;url&#39;]);
 
//删除数组
unset($arr);

unset Introduction:

unset — Release the given variable

Description

unset ( mixed $var [, mixed $... ] ) : void

unset() Destroys the specified variable.

The behavior of unset() in a function will vary depending on the type of variable you want to destroy.

If you unset() a global variable in a function, only the local variable will be destroyed, and the variables in the calling environment will maintain the same value before calling unset().

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