You are viewing the version of this documentation from Perl blead. This is the main development branch of Perl. (git commit 233e70e50b57acf34a1003a191ae9a57e8706973)
rindex STR,SUBSTR,POSITION
rindex STR,SUBSTR

Works just like index except that it returns the position of the last occurrence of SUBSTR in STR. If POSITION is specified, returns the last occurrence beginning at or before that position.