Detailed explanation of PHP encoding conversion function application skills_php examples

There are a huge number of functions in PHP to support our required applications. The function introduced below is about the PHP encoding conversion function. I hope to be helpful. The mb_convert_encoding function is PHP's internal multi-byte string encoding conversion function.

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

PHP encoding conversion function prototype:

/**
* Multi-byte string encoding conversion function
*
* @param string str The string that needs to be encoded and converted
* @param string to_encoding specifies conversion to a certain encoding
, such as: gb2312, gbk, utf-8, etc.
* @param mixed from_encoding Mix the encoding of the original string specified
, such as: specify JIS, eucjp-win, sjis-win mixed encoding at the same time
* @return string
string mb_convert_encoding ( string str, string to_encoding [, mixed from_encoding] )

Example of using PHP encoding conversion function:

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

< &#63;PHP  
header("content-Type: text/html; 
charset=Utf-8");  
echo mb_convert_encoding("
你是我的好朋友", "UTF-8", "GBK");  
&#63;> 

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

// 注意将此文件存盘成 utf-8 
编码格式文件再测试  
< &#63;PHP  
header("content-Type: text/html; 
charset=gb2312");  
echo mb_convert_encoding("
你是我的好朋友", "gb312", "utf-8");  
&#63;> 

3. Convert the entire page

This method is suitable for all coding environments. In this way, all character sets other than the first 128 characters (display characters) are represented by NCR (Numeric character reference, such as "Chinese characters" will be converted into "Chinese characters"). This encoding can be used in any encoding environment. normal display.

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

mb_internal_encoding("gb2312");  
// 这里的gb2312是你网站原来的编码  
mb_http_output("HTML-ENTITIES"); ob_start('mb_output_handler');  

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 and configuring, and then compile and install PHP.

Conclusion:

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