mb_http_input

Function name: mb_http_input()

Applicable version: PHP 4 >= 4.0.6, PHP 5, PHP 7

Function description: The mb_http_input() function is used to return the current HTTP input character encoding.

usage:

 mb_http_input([string $type = ""]) : mixed

Parameter description:

• $type (optional): Specifies the HTTP input character encoding type to be returned. Optional values ​​include "G", "P", "C", "S", "L" and "I". The default is an empty string.

Return value:

• If the $type parameter is an empty string, the name (string) of the current HTTP input character encoding is returned.
• If the $type parameter specifies a character encoding type, it returns whether the current HTTP input character encoding belongs to the specified character encoding type (Boolean).

Example:

 // 示例1：返回当前的HTTP 输入字符编码$inputEncoding = mb_http_input(); echo "当前的HTTP 输入字符编码是：$inputEncoding"; // 示例2：检查当前的HTTP 输入字符编码是否为UTF-8 $isUTF8 = mb_http_input("utf-8"); if ($isUTF8) { echo "当前的HTTP 输入字符编码是UTF-8"; } else { echo "当前的HTTP 输入字符编码不是UTF-8"; }

Notes:

• The mb_http_input() function requires support for the mbstring extension. Make sure the mbstring extension is enabled in the PHP configuration file.
• In some cases, the mb_http_input() function may not accurately detect HTTP input character encoding, and the return result may be inaccurate. It is recommended to use other methods to obtain character encoding, such as obtaining character encoding information in the HTTP request header through $_SERVER['HTTP_ACCEPT_CHARSET'] .