Description:
------------
See below my testing script. I've test with all version of php it's return same 
result.

Test script:
---------------
$a = 0;
if($a == 'id'){
	echo 'Yes' . PHP_EOL;
}

var_dump($a);
var_dump($a == 'id');
var_dump($a == 'ids');
var_dump($a == 'def');

$a = 1;
if($a == 'id'){
	echo 'Yes' . PHP_EOL;
}

var_dump($a);
var_dump($a == 'id');
var_dump($a == 'ids');
var_dump($a == 'def');

// Result
Yes
int(0)
bool(true)
bool(true)
bool(true)
int(1)
bool(false)
bool(false)
bool(false)

Expected result:
----------------
$a = 0;
var_dump($a == 'abc');
//should be: bool(false)