How to correctly count Chinese words in PHP

How to correctly count Chinese words in PHP? This is a problem that has plagued me for a long time, there are many functions in PHP to calculate the length of the string, such as the following example, respectively, the strlen mb_strlen mb_strwidth three function to test the length of the statistical string, to see the Chinese counted as a few bytes:

EchoStrlen( "Hello abc"  ;# output 9 echo mb_strlen ( "Hello abc"  ' UTF-8 ' ) ;# output 5echo mb_strwidth ( Hello abc" 7    

From the above test, we can see: The Chinese characters are strlen counted as 3 bytes, regardless of the English language mb_strlen , all 1 bytes, and the mb_strwidth Chinese is counted as 2 bytes, so mb_strwidth we want to : Chinese 2 bytes, English 1 bytes .

The same interception string is also recommended mb_strimwidth to use, but also according to the Chinese 2 bytes, the English 1 byte method after the calculation, and if the number of words than the interception requirements, this function can also be added in the last side of the ' ... '.

mb_strimwidth($post_excerpt,0,240,‘...‘,‘utf-8‘);

Note that the last addition of the ' Utf-8 ' encoding parameter, can avoid the problem of Chinese truncation garbled.

How to correctly count Chinese words in PHP