[PHP] "&&" vs "and"

amps_vs_and.php

<?php

$e = 0;
$a = null;
function justAmps($e, $a){
    if($a = 5 && $e + $a){
        print "+";
    } else {
        print "-";
    }
}
function justAnd($e, $a){
    if($a = 5 and $e + $a){
        print "+";
    } else {
        print "-";
    }
}
justAmps($e, $a); // -
justAnd($e, $a); // +