Flashvars

Ive been surfing the web for a while now for a decent flashvars tutorial and I have not found a good one.

What I want to do is use the html flash parameters to retrieve a variable from php.

in my html I have this:

<script language="javascript">
	if (AC_FL_RunContent == 0) {
		alert("This page requires AC_RunActiveContent.js.");
	} else {
		AC_FL_RunContent(
			'codebase', 'http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=9,0,0,0',
			'width', '980',
			'height', '500',
			'src', 'phpartgallery',
			'quality', 'high',
			'pluginspage', 'http://www.macromedia.com/go/getflashplayer',
			'align', 'middle',
			'play', 'true',
			'loop', 'true',
			'scale', 'showall',
			'wmode', 'window',
			'devicefont', 'false',
			'id', 'phpartgallery',
			'bgcolor', '#e3e2a7',
			'name', 'phpartgallery',
			'menu', 'false',
			'allowFullScreen', 'false',
			'page_num', '<?=$page;?>',
			'allowScriptAccess','sameDomain',
			'movie', 'phpartgallery',
			'salign', ''
			); //end AC code
	}
</script>
<noscript>
	<object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=9,0,0,0" width="980" height="500" id="phpartgallery" align="middle">
        <param name="allowScriptAccess" value="sameDomain" />
        <param name="allowFullScreen" value="false" />
        <param name="page_num" value="<?=$page;?>" />
        <param name="movie" value="phpartgallery.swf" />
        <param name="menu" value="false" />
        <param name="quality" value="high" />
        <param name="bgcolor" value="#e3e2a7" />
    <embed src="phpartgallery.swf" menu="false" quality="high" bgcolor="#e3e2a7" width="980" height="500" name="phpartgallery" page_num="<?=$page;?>" align="middle" allowScriptAccess="sameDomain" allowFullScreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" />
	</object>
</noscript>

How will i retrieve these within AS3?