ODESK PHP If / Else Script

gistfile1.phtml

<?php 

$array_of_zips = [53005, 53007, 53008, 53018, 53029, 53045, 53046, 53051, 53052, 53056, 53058, 53064, 53066, 53069, 53072, 53089, 53103, 53118, 53119, 53122, 53127, 53146, 53149, 53150, 53151, 53153, 53183, 53186, 53187, 53188, 53189];

$zip_parameter = $_GET['zip'];

$executeScript = 'script2';

if (in_array($zip_parameter, $array_of_zips)) {
    $executeScript = 'script1';
}

if (!isset($_GET['tfa_next']) && $executeScript == 'script1') {
    
    $params= "?tfa_22=".$_GET['zip'];
    echo file_get_contents("http://app.formassembly.com/rest/forms/view/370146".$params);

} else if (!isset($_GET['tfa_next']) && $executeScript == 'script2') {

    $params= "?tfa_22=".$_GET['zip'];
    echo file_get_contents("http://app.formassembly.com/rest/forms/view/370206".$params);

} else {
    echo file_get_contents("http://app.formassembly.com/rest".$_GET['tfa_next']);
}

}?>