Attempts to intelligently use "a" and "an" in a sentence.

Intelligent Indefinite Articles

    $l = array( 'a apple is a fruit', 'a banana is also a fruit' );

    foreach( $l as $s ) {
      $s = preg_replace( '/(^| )a ([aeiouAEIOU])/', '$1an $2', $s );
      echo $s . "\n";
    }
        
    # outputs
    an apple is a fruit
    a banana is also a fruit