PHP strlen() 函数 - PHP教程

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strlen()

1. 定义

该函数返回指定字符串的长度。

2. 语法

strlen ( string $string ) : int

3. 参数说明

参数	可选性	数据类型	描述
$string	必需	字符串	要检查的字符串

4. 示例

<?php

// strlen()
// 返回指定字符串的长度

$str = 'hello, world!';
$length = strlen($str);
var_dump($length);// 输出：int(13)

5. 延展阅读

count()：返回指定数组的元素个数或实现了Countable接口的对象对象属性的个数

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