How to count the number of Chinese characters in php

How to correctly count the number of Chinese characters in PHP? This is a problem that has troubled me for a long time. There are many functions in PHP that can calculate the length of string. For example, in the following example, three of

strlen

mb_strlen

mb_strwidth

are used respectively. Function to test the length of the statistical string to see how many bytes Chinese characters are calculated:

[code]echo strlen("你好ABC") . "";
# 输出 9
echo mb_strlen("你好ABC", 'UTF-8') . "";
# 输出 5
echo mb_strwidth("你好ABC") . "";
#输出 7

From the above test, we can see:

strlen

convert Chinese characters Counted as 3 bytes,

mb_strlen

regardless of Chinese or English, counted as 1 bytes, and

mb_strwidth

counted as Chinese Into 2 bytes, so

mb_strwidth

is what we want: 2 bytes for Chinese, 1 byte for English.
It is also recommended to use

mb_strimwidth

to intercept strings, which is also calculated according to the 2 bytes in Chinese and 1 byte in English, and if the number of words exceeds the interception requirements, This function can also automatically add '...' at the end.

[code]mb_strimwidth($post_excerpt,0,240,'...','utf-8');

Note that adding the ‘utf-8’ encoding parameter at the end can avoid the problem of garbled Chinese interception.

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