Php Chinese string truncation without garbled characters

Source: Internet
Author: User

Substr interception

The substr () function returns part of the string.

 

The code is as follows: Copy code
<? Php
$ Rest = substr ("I am a Chinese",-1); // returns "garbled"
Echo $ rest. '<br/> ';
$ Rest = substr ("abcdef",-2); // returns "ef"
Echo $ rest. '<br/> ';
$ Rest = substr ("abcdef",-3, 1); // returns "d"
Echo $ rest. '<br/> ';
?>

Then Baidu goole says it can be intercepted by mb_substr.

The code is as follows: Copy code


<? Php
Echo mb_substr ('we are all good children he );
?>

Running mechanism prompt

Fatal error: Call to undefined function mb_substr ()...

Later, a friend told me that the server was not normally opened.Php_mbstring.dll. Open php_mbstring.dll in php. ini., Find idc vendors do not open, only to find another way

The code is as follows: Copy code

Function msubstr ($ str, $ start = 0, $ length, $ charset = "UTF-8", $ suffix = true)
    {
If (function_exists ("mb_substr "))
Return mb_substr ($ str, $ start, $ length, $ charset );
Elseif (function_exists ('iconv _ substr ')){
Return iconv_substr ($ str, $ start, $ length, $ charset );
        }
$ Re ['utf-8'] = "/[x01-x7f] | [xc2-xdf] [x80-xbf] | [xe0-xef] [x80-xbf] {2} | [xf0-xff] [x80-xbf] {3 }/";
$ Re ['gb2312'] = "/[x01-x7f] | [xb0-xf7] [xa0-xfe]/";
$ Re ['gbk'] = "/[x01-x7f] | [x81-xfe] [x40-xfe]/";
$ Re ['big5'] = "/[x01-x7f] | [x81-xfe] ([x40-x7e] | xa1-xfe])/";
Preg_match_all ($ re [$ charset], $ str, $ match );
$ Slice = join ("", array_slice ($ match [0], $ start, $ length ));
If ($ suffix) return $ slice ."... ";
Return $ slice;
    }

This solves all the problems. It seems that it is intercepted by character encoding.

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