Discuss the application skills of PHP encoding conversion function_PHP tutorial

in

can be used to facilitate encoding conversion when necessary (such as solving the problem of garbled Chinese characters caused by using Ajax in the GB2312 encoding environment). To solve the problem of garbled web pages, it is very convenient to use, very efficient, and supports almost all encodings. PHP 4 >= 4.0.6, PHP 5 versions supported.

PHP encoding conversion function prototype:

1. /**
2. * Multi-byte string encoding conversion function
3. *
4. * @param string str needs to be encoded The string
5. * @param string to_encoding specifies the conversion to a certain encoding
   , such as: gb2312, gbk, utf-8, etc.
6. * @param mixed from_encoding mixedly specifies the encoding of the original string
   , such as specifying JIS, eucjp-win, sjis-win mixed encoding at the same time
7. * @return string
8. string mb_convert_encoding ( string
   str, string to_encoding [, mixed from_encoding] )

Usage example of PHP encoding conversion function:

1. Convert GBK encoded string to UTF-8 encoded string

<ol class="dp-xml">
<li class="alt"><span class="tag"> ?PHP   </span></li>
<li>
<span>header("content-Type: text/html; <br></span><span class="attribute">charset</span><span>=</span><span class="attribute-value">Utf</span><span>-8");   </span>
</li>
<li class="alt"><span>echo mb_convert_encoding("<br>你是我的好朋友", "UTF-8", "GBK");   </span></li>
<li>
<span class="tag">?></span><span>  </span>
</li>
</ol>

2. Convert UTF-8 encoded string to GB2312 encoded string

<ol class="dp-xml">
<li class="alt"><span><span>// 注意将此文件存盘成 utf-8 <br>编码格式文件再测试   </span></span></li>
<li><span class="tag"><span> ?</span>PHP<span>   </span></span></li>
<li class="alt">
<span>header("content-Type: text/html; <br></span><span class="attribute">charset</span><span>=</span><span class="attribute-value">gb2312</span><span>");   </span>
</li>
<li><span>echo mb_convert_encoding("<br>你是我的好朋友", "gb312", "utf-8");   </span></li>
<li class="alt">
<span class="tag">?></span><span>  </span>
</li>
</ol>

3. Convert the entire page

This method is applicable to all coding environments. In this way, the character set other than the first 128 characters (display characters) is represented by NCR (Numeric character reference, such as "Chinese characters" will be converted into the form "汉字"). This encoding is The page can be displayed normally in any coding environment.

Add the following three lines of code to the head of the PHP file:

<ol class="dp-xml">
<li class="alt"><span><span>mb_internal_encoding("gb2312");   </span></span></li>
<li><span>// 这里的gb2312是你网站原来的编码   </span></li>
<li class="alt"><span>mb_http_output("HTML-ENTITIES"); ob_start('mb_output_handler');   </span></li>
</ol>

Using the mb_convert_encoding function requires enabling PHP's mbstring (multi-byte string) extension.

If the mbstring extension of PHP is not enabled, you need to make the following settings to allow PHP to support the extension.

1. Windows server environment

Edit the PHP.ini file, remove the ; in front of extension=PHP_mbstring.dll, and restart the web server.

2. Linux server environment

Add the --enable-mbstring=cn compilation parameter when compiling the configuration, and then compile and install PHP.

Conclusion:

If there is anything you still don’t understand when using the PHP encoding conversion function, you can refer to the "PHP Manual".

http://www.bkjia.com/PHPjc/445953.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/445953.htmlTechArticle can be used in necessary situations (such as: solving the garbled Chinese characters generated by using Ajax in the GB2312 encoding environment problem) to facilitate encoding conversion to solve the problem of garbled web pages,...