PHP mb_strlen Function Guide

The mb_strlen() function is used to obtain the length of a string, including multi-byte characters. This function is provided by the mbstring extension.

string mb_strlen ( string $str [, string $encoding = mb_internal_encoding() ] )

Explanation of parameters:

1. It is necessary to obtain the length of the string.
2. Encoding: Optional, specifies the character encoding to be used. By default, it uses the value of mb_internal_encoding().

Original sentence: 我们需要采取紧急行动来解决这个问题。

Paraphrased sentence: We need to take urgent action to address this issue.

$str = "你好，世界！";
echo mb_strlen($str); // 输出 6