AND operator behavior with/without brackets
<pre><code>$a = true and false; //true
$b = true &amp;&amp; false; //false
$c = (true and false); //false
$d = (true &amp;&amp; false); //false
</code></pre>

<p>Why gives case 'a'  true?</p>

<p>I thought that and and &amp;&amp; has the same precedence but <a href="http://www.php.net/manual/en/language.operators.precedence.php" rel="nofollow">they don't</a>. </p>
