Perl rindex Function
This function operates similar to index, except it returns the position of the last occurrence of SUBSTR in STR. If POSITION is specified, returns the last occurrence at or before that position.
Following is the simple syntax for this function −
rindex STR, SUBSTR, POSITION rindex STR, SUBSTR
This function returns undef on failure otherwise position of last occurence.
Following is the example code showing its basic usage −Live Demo
#!/usr/bin/perl -w $pos = rindex("abcdefghijiklmdef", "def"); print "Found position of def $pos\n"; # Use the first position found as the offset to the # next search. # Note that the length of the target string is # subtracted from the offset to save time. $pos = rindex("abcdefghijiklmdef", "def", $pos-3 ); print "Found position of def $pos\n";
When above code is executed, it produces the following result −
Found position of def 14 Found position of def 3