http://www.perlmonks.org?node_id=881019


in reply to Re: Regex to match multiple words in an email subject
in thread Regex to match multiple words in an email subject

print /(?:SSL|SSL Certificate|VASCO)/ ? "Match\n" : "No match\n";

Because the pattern is not anchored at either end the string 'SSL Certificate' will never match.

$ perl -le' my @strings = ( "SSL", "SSL Certificate", "VASCO", "something else", ); for ( @strings ) { print $1 if /(SSL|SSL Certificate|VASCO)/; } ' SSL SSL VASCO

With no anchors you need to put the longer strings first:

$ perl -le' my @strings = ( "SSL", "SSL Certificate", "VASCO", "something else", ); for ( @strings ) { print $1 if /(SSL Certificate|SSL|VASCO)/; } ' SSL SSL Certificate VASCO