Multibyte String Functions
PHP Manual

mb_strripos

Finds position of last occurrence of a string within another, case insensitive

Description

intfalse mb_strripos(
    string $haystack,
    string $needle,
    int $offset = 0,
    stringnull $encoding = null
)

mb_strripos performs multi-byte safe strripos operation based on number of characters. needle position is counted from the beginning of haystack. First character's position is 0. Second character position is 1. Unlike mb_strrpos, mb_strripos is case-insensitive.

Parameters

haystack

The string from which to get the position of the last occurrence of needle

needle

The string to find in haystack

offset

The position in haystack to start searching

encoding

Character encoding name to use. If it is omitted, internal character encoding is used.

Return Values

Return the numeric position of the last occurrence of needle in the haystack string, or false if needle is not found.

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 encoding is nullable now.

See Also

  • strripos
  • strrpos
  • mb_strrpos