mb_strrpos throws a warning if $haystack is empty.
strrpos simply returns FALSE.
This is something to be wary of if overloading the mb functions.
(PHP 4 >= 4.0.6, PHP 5)
mb_strrpos — Find position of last occurrence of a string in a string
$offset= 0 [, string
$encoding= mb_internal_encoding() ]] )
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.
The string being checked, for the last occurrence
The string to find in
parameter is the character encoding. If it is omitted, the internal character
encoding value will be used.
Returns the numeric position of
the last occurrence of
needle in the
haystack string. If
needle is not found, it returns
|5.2.0||Added the optional parameter
encodingparameter was moved from the third position to the fourth in PHP 5.2.0. For backward compatibility,
encodingcan be specified as the third parameter, but doing so is deprecated and will be removed in the future.