$a='<p style="text-align: center;"><!--more--><object width="400" height="300" data="http://media.y8.com/games/content/minecar_mayhem_game.swf" type="application/x-shockwave-flash"><param name="src" value="http://media.y8.com/games/content/minecar_mayhem_game.swf" /></object>';
$is=explode('value="',$a);
$as=explode('" />',$is[1]);
echo $as[0];