Description:
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Well, when i was using two operators "for()" and one of them was included into another like "for(){for(){}}". I had noticed they at Windows internal variables of these two operators are not intersected. You will see the sense of my words further in example.

Reproduce code:
---------------
for($i=$start_point;$i<count($videos);$i++)
{
	$video = $videos[$i];
	$langs_html = '';
	$lang_ids = unserialize($video->LanguageId);
	foreach($lang_ids as $lang_id)
	{
		$lang = new Lang;
		$lang->Id = $lang_id;
		$lang->init();
		$langs_html .= '<td width="50" align="center"><img src="./index_files/checkmark.gif"></td>';
	}
	for($i=0;$i<(count($langs)-count($lang_ids));$i++)
	{
		$langs_html .= '<td width="50" align="center">&nbsp;</td>';
	}
}

Expected result:
----------------
I was expected to get an array divided into two HTML tables. I have pasted not full code to you. But if you try to use even this example of my code you will see, that $i variable of outer operator "for()" does not conflicts with variable $i of inner operator "for()". Just try to output the value of $i and you will see that it remains unchaged within outer operator.

But at Unix version of PHP that was happening (PHP Version 4.3.9).

Actual result:
--------------
Read in expected result section. Everything was described there.