Adding string with number in php
<pre><code>$a = "3dollars";
$b = 20;
echo $a += $b;
print($a += $b);
</code></pre>

<p>Result:</p>

<pre>
23
43
</pre>

<p>I have a question from this calculation.$a is a string and $b is number.I am adding both and print using echo its print 23 and print using print return 43.How is it</p>
