Find position of last occurrence of a string in a string

# mb_strrpos

(PHP 4 >= 4.0.6, PHP 5, PHP 7, PHP 8)

mb_strrpos — Find position of last occurrence of a string in a string

### Description

mb_strrpos(
string `$haystack`,
string `$needle`,
int `$offset` = 0,
?string `$encoding` = `null`
): int|false

Performs a multibyte safe strrpos() operation based on the number of characters. `needle` position is counted from the beginning of `haystack`. First character's position is 0. Second character position is 1.

### Parameters

`haystack`

  The string being checked, for the last occurrence of `needle`

`needle`

  The string to find in `haystack`.

`offset`
  May be specified to begin searching an arbitrary number of characters into the `haystack`. Negative values will stop searching at an arbitrary point prior to the end of the `haystack`.
`encoding`

  The `encoding` parameter is the character encoding. If it is omitted or `null`, the internal character encoding value will be used.

### Return Values

Returns the numeric position of the last occurrence of `needle` in the `haystack` string. If `needle` is not found, it returns `false`.

### Errors/Exceptions

- If `offset` is greater than the length of `haystack`, a ValueError will be thrown.

### Changelog

Version | Description
--- | ---
8.0.0 | `needle` now accepts an empty string.
8.0.0 | Passing the `encoding` as the third argument instead of an `offset` has been removed.
8.0.0 | `encoding` is nullable now.

### See Also

- mb_strpos() - Find position of first occurrence of string in a string
- mb_internal_encoding() - Set/Get internal character encoding
- strrpos() - Find the position of the last occurrence of a substring in a string

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