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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['name']='baiduzhidao'; $arr['url']='baiduzhidaocom'; //删除某个元素 unset($arr['url']); //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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