php & before variable
It passes a reference to the variable so when any variable assigned the reference is edited, the original variable is changed. They are really useful when making functions which update an existing variable. Instead of hard coding which variable is updated, you can simply pass a reference to the function instead. Example <?php $number = 3; $pointer = &$number; // Sets $pointer to a reference to $number echo $number."<br/>"; // Outputs '3' and a line break $pointer = 24; // Sets $number to 24 echo $number; // Outputs '24' ?>
