mb_strripos

Function name: mb_strripos()

Applicable version: PHP 4 >= 4.2.0, PHP 5, PHP 7

Function Description: The mb_strripos() function returns the last occurrence of the specified string in another string (case insensitive). If the string is not found, false is returned.

Syntax: mb_strripos(string $haystack, string $needle, int $offset = 0, string $encoding = null): int|bool

parameter:

• $haystack: The string to look for in it.
• $needle: The string to be found.
• $offset: Optional parameter, searching from the specified position of the string (default is 0).
• $encoding: Optional parameter, specifying the character encoding to use (default is internal character encoding).

Return value:

• If the specified string is found, the last occurrence position (in integer form) is returned.
• If the specified string is not found, false is returned.

Example 1:

 $string = "Hello, World!"; $needle = "world"; $position = mb_strripos($string, $needle); if ($position !== false) { echo "找到了needle 在haystack 中的位置：$position"; } else { echo "未找到needle 在haystack 中"; }

Output:

找到了needle 在haystack 中的位置：7

Example 2:

 $string = "Hello, World!"; $needle = "WORLD"; $position = mb_strripos($string, $needle); if ($position !== false) { echo "找到了needle 在haystack 中的位置：$position"; } else { echo "未找到needle 在haystack 中"; }

Output:

找到了needle 在haystack 中的位置：7

Notes:

• The mb_strripos() function is case-insensitive and can find case-insensitive matches.
• If the $offset parameter is specified, the function starts the search from the specified location.
• If the $encoding parameter is specified, the function will search with the specified character encoding.