All the sources codes "But why ?"page 31

function getIsTroifois($order) {
if ($order->getPayment()->getMethod() == '3X')
return $order->hasSim();
}
function hasSim() {
return $this->getPrice() != '1.00' ? false: $this->getPrice();
}

<?php

$hash = sha1(crc32(md5($_POST['password'])));

?>

    /**
     *  BLANK_STRING storing "" for comparision
     */
    public static transient String BLANK_STRING = "";
    /**
     * The empty String <code>""</code>.
     *  
     */
    public static final String EMPTY = "";