php练习02

<?php
/**
 * Created by PhpStorm.
 * User: Administrator
 * Date: 2022/4/20/020
 * Time: 14:35
 */
//数组元素的删除 array_shift()
echo"<pre>";
$sanguo=array('shhuguo'=>'liubei','weiguo'=>'caocao','wuguo'=>'sunquan');
$p = array_shift($sanguo);
echo $p.'<br>';
var_dump($sanguo);
//array-pop()  删除的是最后一个元素
$sanguo=array('shhuguo'=>'liubei','weiguo'=>'caocao','wuguo'=>'sunquan');
$p = array_pop($sanguo);
echo $p.'<br>';
var_dump($sanguo);
//删除指定的元素  unset()
$sanguo=array('shhuguo'=>'liubei','weiguo'=>'caocao','wuguo'=>'sunquan');
unset($sanguo['shhuguo']);
var_dump($sanguo);
unset($sanguo[0]);
var_dump($sanguo);
unset($sanguo[1],$sanguo['weiguo']);
var_dump($sanguo);
echo"<br>";
echo"<br>";
echo"<br>";