Root; “String Literals in Perl”; PerlMonks; http://www.perlmonks.org/?node=String%20Literal%20in%20Perl; Nov. 1999; accessed Sep. 21, 2015; 4 pages. “Strings”; PHP:Strings—Manual; http://www.php.net/manual/en/language.types.string.php; © 2001-2015; accessed Sep. 21, 2015...