The explode function splits a string by a delimiter and returns an array. Implodes() does the opposite.

    
    $sentence = "Four score and seven years ago.";
    $sentenceExplode = explode(" ", $sentence);
    print_r($sentenceExplode);
    // Array ( [0] => Four [1] => score [2] => and [3] => seven [4] => years [5] => ago. )