<span style="color: #008000">/*</span><span style="color: #008000">**********array_key_exists(检查键名或索引是否在数组中)****************</span><span style="color: #008000">*/</span>
<span style="color: #800080">$arr1</span> = <span style="color: #0000ff">array</span>('name' => 'Sheldon', 'age' => 30, 'address' => 'Carlifornia'<span style="color: #000000">);
</span><span style="color: #0000ff">if</span> (<span style="color: #008080">array_key_exists</span>('name', <span style="color: #800080">$arr1</span><span style="color: #000000">)) {
</span><span style="color: #0000ff">echo</span> 'the name element is in the array.'<span style="color: #000000">;
} </span><span style="color: #0000ff">else</span><span style="color: #000000"> {
</span><span style="color: #0000ff">echo</span> 'name elment not exist.'<span style="color: #000000">;
}</span>查看$arr1中有没有叫'name'的键名。
也可以检查 数字索引。
PHP怎么学习？PHP怎么入门？PHP在哪学？PHP怎么学才快？不用担心，这里为大家提供了PHP速学教程(入门到精通)，有需要的小伙伴保存下载就能学习啦！
广告![ThinkPHP5快速开发企业站点[全程实录]](https://img.php.cn/upload/course/000/000/068/6253d918a3ce7278.png)
收藏
收藏
Copyright 2014-2025 https://www.php.cn/ All Rights Reserved | php.cn | 湘ICP备2023035733号
10864
