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mb_strrichr

Finds the last occurrence of a character in a string within another, case insensitive (PHP 5 >= 5.2.0)
string mb_strrichr ( string haystack, string needle [, bool part [, string encoding]] )

mb_strrichr() finds the last occurrence of needle in haystack and returns the portion of haystack. Unlike mb_strrchr(), mb_strrichr() is case-insensitive. If needle is not found, it returns FALSE.

Parameters

haystack

The string from which to get the last occurrence of needle

needle

The string to find in haystack

part

Determines which portion of haystack this function returns. If set to TRUE, it returns all of haystack from the beginning to the last occurrence of needle. If set to FALSE, it returns all of haystack from the last occurrence of needle to the end, Default value is FALSE.

encoding

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

Return Values

Returns the portion of haystack. or FALSE if needle is not found.