Why output = 2

Question

<?php

$b = 0;
$c =1;

function get($x)
{
return $x;
}

if($a=get($b))
{
echo 1;
}

if($a=get($c))
{
echo 2;
}

Answer 1

if($a=get($b))
This evaluates to false so the code is not run. $b equals zero and $a is set to zero via the get function, then its value is checked for the if statement. Zero is equivalent to false.
Likewise,
if($a=get($c))
evaluates to true. $c equals 1. $a is set to 1 via the get function and is then checked for the if statement. 1 is equivalent to true, so the code in the if statement is run outputting 2.

Answer 2

yeap,,but first if statement have also echo