mb_check_encoding

Function name: mb_check_encoding()

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

Function description: mb_check_encoding() function is used to check whether a string is the specified character encoding.

Usage: bool mb_check_encoding ( string $var [, string $encoding = mb_internal_encoding() ] )

parameter:

• $var: The string to be checked.
• $encoding (optional): The character encoding to check. If not specified, the current internal character encoding is used.

Return value:

• Return true if the string $var is the specified character encoding $encoding.
• If the string $var is not the specified character encoding $encoding, false is returned.

Example:

 // 检查字符串是否是UTF-8 编码$str = "Hello, 世界!"; if (mb_check_encoding($str, "UTF-8")) { echo "字符串是UTF-8 编码"; } else { echo "字符串不是UTF-8 编码"; }

Output:

字符串是UTF-8 编码

Notes:

• This function relies on the mbstring extension and needs to be enabled in the PHP configuration file.
• If no character encoding $encoding is specified, the function will check using the current internal character encoding returned by mb_internal_encoding().
• If you need to check multiple character encodings, you can use the mb_detect_encoding() function.