<? $text = "45hj45nh4gfrehg4th54vars=231412&file=51512521353253263&nologogadgrehtuy5yt5h4eh4"; preg_match_all("|vars=(.*)&file=(.*)&nologo|", $text, $out, PREG_SET_ORDER); echo $out[0][1]."\n"; echo $out[0][2]."\n"; ?>
<?php $match = file_get_contents('http://www.site.com/index.html'); preg_match_all("#vars=\"file=(.*)&nologo#isU", $match, $out, PREG_SET_ORDER); echo '<pre>'; print_r($out['1']); echo '</pre>'; ?>