How to intercept Chinese strings in php

How to intercept Chinese strings in php? As we all know, the native function substr of php does not support intercepting Chinese strings. The following code provides a variety of methods to intercept php Chinese strings. 1. intercept the GB2312 Chinese string & lt ;? Php & lt ;? Php intercepts a Chinese string functionmysubstr ($ str, $ start, $ len) {$ tmpstr; how does php intercept a Chinese string?
As we all know, the native function substr of php does not support intercepting Chinese strings. The following code provides a variety of methods to intercept php Chinese strings.

1. truncate the GB2312 Chinese string

 0xa0) {$ tmpstr. = substr ($ str, $ I, 2); $ I ++;} else $ tmpstr. = substr ($ str, $ I, 1);} return $ tmpstr ;}?>

2. truncate UTF-8 encoded multi-byte strings

3. UTF-8, GB2312 support Chinese character truncation function

 $ Sublen) return join ('', array_slice ($ t_string [0], $ start, $ sublen )). "... "; return join ('', array_slice ($ t_string [0], $ start, $ sublen);} else {$ start = $ start * 2; $ sublen = $ sublen * 2; $ strlen = strlen ($ string); $ tmpstr = ''; for ($ I = 0; $ I <$ strlen; $ I ++) {if ($ I >=$ start & $ I <($ start + $ sublen) {if (ord (substr ($ string, $ I, 1)> 129) {$ tmpstr. = substr ($ string, $ I, 2);} else {$ tmpstr. = substr ($ str Ing, $ I, 1) ;}} if (ord (substr ($ string, $ I, 1)> 129) $ I ++ ;} if (strlen ($ tmpstr) <$ strlen) $ tmpstr. = "... "; return $ tmpstr ;}}$ str =" string to be intercepted by abcd "; echo cut_str ($ str, 8, 0, 'gb2312');?>

4. BugFree character truncation function

<? Php/*** @ package BugFree * @ version $ Id: FunctionsMain. inc. php, v 1.32 11:38:37 wwccss Exp $ *** Return part of a string (Enhance the function substr () ** @ author Chunsheng Wang
 
  
* @ Param string $ String the string to cut. * @ param int $ Length the length of returned string. * @ param booble $ Append whether append "... ": false | true * @ return string the cutted string. */function sysSubStr ($ String, $ Length, $ Append = false) {if (strlen ($ String) <=$ Length) {return $ String ;} else {$ I = 0; while ($ I <$ Length) {$ StringTMP = substr ($ String, $ I, 1); if (ord ($ StringTMP)> = 224 ){ $ StringTMP = substr ($ String, $ I, 3); $ I = $ I + 3;} elseif (ord ($ StringTMP)> = 192) {$ StringTMP = substr ($ String, $ I, 2); $ I = $ I + 2;} else {$ I = $ I + 1 ;} $ StringLast [] = $ StringTMP;} $ StringLast = implode ("", $ StringLast); if ($ Append) {$ StringLast. = "... ";}return $ StringLast ;}$ String =" 17test.info is at the forefront of China's automated testing "; $ Length =" 18 "; $ Append = false; echo sysSubStr ($ String, $ Length, $ Append);?>