mb_strrichr

Function name: mb_strrichr()

Applicable version: PHP 4 >= 4.0.6, PHP 5, PHP 7, PHP 8

Usage: The mb_strrichr() function is used to search for the specified character in a string and return the last occurrence of the character. This function is an extension to the mb_strrchr() function and is case-insensitive.

Syntax: mb_strrichr(string $haystack, string $needle [, bool $part [, string $encoding = mb_internal_encoding()]]): string|false

parameter:

• $haystack: The string to search for.
• $needle: The character to search for.
• $part (optional): If set to true, return all characters to the needle and its right. Default is false, only returning the last occurrence position of the needle and its characters to the right.
• $encoding (optional): character encoding. If not specified, internal character encoding is used.

Return value:

• If a needle is found, it returns the last occurrence position and the character to the right.
• If no need is found, false is returned.

Example:

 $str = "Hello, World!"; $lastPos = mb_strrichr($str, "o"); echo $lastPos; // 输出"orld!" $lastPos = mb_strrichr($str, "O"); echo $lastPos; // 输出"orld!" $lastPos = mb_strrichr($str, "o", true); echo $lastPos; // 输出"o, World!" $lastPos = mb_strrichr($str, "O", true); echo $lastPos; // 输出"o, World!"

Notes:

• This function requires support for the "mbstring" extension, and make sure that the extension is enabled in the PHP configuration file.
• If the $encoding parameter is specified, the function will operate with the specified character encoding, otherwise the internal character encoding will be used.
• This function is case-sensitive when searching for characters. If you need to be case-sensitive, use the mb_strrchr() function.