Hi

Please note that in your example coding the '$sting' and '$substing' are misspelled in some occurances, to avoid this use 'use strict;'

You can escape those slashes in the matching string by using '\Q and \E' like

use strict;

my $string = "this is my sting with \ and /slashes. put substing in qu
+otes"; 
my $substring = "with \ and /slashes"; 
$string =~ s/\Q$substring\E/\"$substring\"/gi; 

print $string;
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Punitha