Detailed explanation on the usage of php iconv function

extension_dir = "C:/ipaddr/php/extensions/"

(Note, it is recommended to write the full address and add / after it. Many times it is because the settings here are incorrect. As a result, dlls of other modules cannot be loaded) Open it again:

extension=php_gd2.dll

But if iconv.dll is installed, follow the above method and after opening php_iconv.dll, the iconv module still cannot be opened. The following configuration is required: a.Go to the official download site of iconv http://ftp.gnu.org/pub/gnu/libiconv/ The following iconv file for Windows version: libiconv-1.9.1.bin.woe32.zip Unzip the file and copy charset.dll, iconv.dll, and iconv.exe under bin/ to c:/windows/ (or other system PATH) (This step is necessary, php_iconv.dll also calls GNU’s iconv library, so you must first install GNU’s iconv library)

b. Open php_iconv.dll in php.ini

c. Restart Apache, and then check whether iconv is enabled in phpinfo();.

In a recent program, I needed to use the iconv function to convert the captured utf-8 encoded page into gb2312. I found that only by using the iconv function to transcode the captured data, the data would be less for no reason. . This is a bug in the iconv function. iconv will make an error when converting the character "-" to gb2312.

Solution: Add "//IGNORE" after the encoding that needs to be converted, which is the second parameter of the iconv function. As follows:

iconv("UTF-8","GB2312//IGNORE",$data)

ignore means ignoring errors during conversion. If there is no ignore parameter, all the The string following the character cannot be saved.

This iconv() function is built-in in php5. Let’s look at a complete example, as follows:

//iconv usage example
//by bbs.it-home.org
echo $str= 'Hello, we sell coffee here!';
echo '';
echo iconv('GB2312', 'UTF-8', $str); //Convert the string encoding from GB2312 to UTF-8
echo '';
echo iconv_substr($str, 1, 1, 'UTF-8'); //Truncate by the number of characters instead of bytes
 print_r(iconv_get_encoding()); //Get the current page encoding information
echo iconv_strlen($str, 'UTF-8'); //Get the string length of the set encoding
//You can also do this
$content = iconv("UTF-8","gbk//TRANSLIT",$content);
?>