A hash or constant would be eficient and reasonably easy to maintain

use constant PHRASE => { 'phrase one'          => 1,
                         'phrase two'          => 1,
                         'a different phrase'  => 1,
                         'yet another match'   => 1,
                         'one more to match'   => 1,
                         'single'              => 1,
                         'word'                => 1,
                        };


if ( PHRASE->{$incoming{'text'}} ) { 
  #DO WHAT NEEDS TO BE DONE HERE 
}
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