PHP Chinese Processing Chinese string truncation (mb_substr) and obtaining Chinese string words

1. Chinese interception: mb_substr ()

Mb_substr ($ str, $ start, $ length, $ encoding)

$ Str: string to be truncated
$ Start: truncates the start point. the start point is 0.
$ Length, number of words to be intercepted
$ Encoding: webpage encoding, such as UTF-8, GB2312, and GBK

Instance:
Copy codeThe Code is as follows:
<? Php
$ Str = 'feet House: http://www.jb51.net ';
Echo mb_substr ($ str, 'utf-8'); // capture the first five characters. Assume that the PHP file where the code is located is encoded as UTF-8.
?>
The result shows: the home of the foot


2. Get Chinese characters: mb_strlen ()

Mb_strlen ($ str, $ encoding)

$ Str: string to calculate the length
$ Encoding: webpage encoding, such as UTF-8, GB2312, and GBK

Instance:
Copy codeThe Code is as follows:
<? Php
$ Str = 'feet House: http://www.jb51.net ';
Echo mb_strlen ($ str, 'utf-8'); // assume that the PHP file where the code is located is encoded as UTF-8.
?>
Result: 24