Home > Article > Backend Development > Recommended essential functions for Chinese processing: Detailed explanation of PHP iconv function
In the process of text processing, it is a common requirement to convert strings in different encoding formats. The iconv (Internationalization Conversion) function provided in the PHP language can meet this need very conveniently. This article will introduce the use of iconv function in detail from the following aspects:
1. Definition of iconv function and introduction to common parameters
iconv function can convert between different character set encodings. Its definition is as follows :
string iconv(string $in_charset, string $out_charset, string $str)
Among them:
(1)$in_charset and $out_charset
Characters that can usually be used in $in_charset and $out_charset The set encodings are:
(2)$str
$str is the string that needs to be converted.
2. Example demonstration: Convert GBK encoded string to UTF-8 encoded string
The following is an example demonstration to show how to use the iconv function. In the code below, we convert a GBK-encoded Chinese character string into a UTF-8-encoded string.
//原始字符串为GBK编码 $str = "中文"; //使用iconv函数转换为UTF-8编码 $str = iconv("GBK", "UTF-8", $str); //输出转换后的字符串 echo $str;
After executing the above code, the page will output "Chinese", which means the original GBK-encoded Chinese character string is successfully converted into a UTF-8-encoded string.
3. Example Demonstration: Convert UTF-8 encoded string to GBK encoded string
Let’s use an example demonstration to show another way to use the iconv function. In the code below, we convert a UTF-8 encoded string to a GBK encoded string.
//原始字符串为UTF-8编码 $str = "中文"; //使用iconv函数转换为GBK编码 $str = iconv("UTF-8", "GBK", $str); //输出转换后的字符串 echo $str;
After executing the above code, the page will also output "Chinese", which means the original UTF-8 encoded string is successfully converted into a GBK encoded string.
4. Under what circumstances is it necessary to use the iconv function
In the actual development process, it is often necessary to convert between different encoding formats. For example, when we obtain data from the database, it may happen that the original data is encoded in GBK, but the front-end display page needs to be displayed in UTF-8 encoding. At this time, we need to use the iconv function to perform encoding conversion.
In addition, the iconv function also needs to be used in the following situations:
To sum up, the iconv function is a very important character encoding processing function in PHP, which can easily achieve conversion between different encoding formats. In the actual development process, if you encounter a situation that requires encoding conversion, you can try to use the iconv function to complete it.
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