I have used G4F as example , i hope shabbir will not get angry

PHP Code:
<html>
<head><title>Fetch info from any website.</title></head>
<body>
<center>
<form action="gfe.php" method="post">
<input type="text" name="searchinfo" value=""/>
<input type="submit" value="Get info"/>
</form>
<?php
// created by Alex Gabriel
// http://ethicalforums.com
function a($string, $start, $end){
$string = " ".$string;
$ini = strpos($string,$start);
if ($ini == 0) return "";
$ini += strlen($start);
$len = strpos($string,$end,$ini) - $ini;
return substr($string,$ini,$len);
}
$test=$_POST['searchinfo'];
if ($test == ""){
echo "Please insert any value";
}
else {
$source = file_get_contents ("http://www.go4expert.com/search.php?do=process&query=$test");
if (stripos(strtolower($source), 'Sorry - no matches.') !== false) {
echo 'No results found.';
exit();
}
else
{
$code_first_part = a($source,'id="thread_title_','<span class="smallfont"');
//thread id
$id=a($source,'<a rel="nofollow" href="showthread.php?t=','&');
//cleaning some stuff
//title
$title = a($code_first_part,'">','</a>');
?>
<a rel="nofollow" href="http://www.go4expert.com/showthread.php?t=<?php echo $id;?>"><?php echo $title; ?></a>
<?php
}
}
?>
</center>
</body>
</html>

