Getting all the links from a webpage

Here is the php code prepared by me to get all the links in a web page

//getting data from the url
$url='http://www.rmmfa2004.org';
$data=@file_get_contents($url);
//extracting the links
preg_match_all("/(href)\s*=\s*[\'\"]?(([[a-z]{3,5}:\/\/(([.a-zA-Z0-9-])+(:[0-9]+)*))*([+:%\/\?~=&;\\\(\),._ a-zA-Z0-9-]*))(#[.a-zA-Z0-9-]*)?[\'\" ]?(\s*rel\s*=\s*[\'\"]?(nofollow)[\'\"]?)?/i", $data, $matches);
$match1= $matches[2];
$match1=split("\r",$matches);
$linkss2 = array_unique($matches[2]);
$links= ($linkss2);
$links1=$links;
echo $linkss2[133];
//array to print links
echo"

";
print_r($matches[2]);

echo"
“;
//stripping slashes from the url
$patternb=”/\/$/i”;
$replace=”";
$url=preg_replace($patternb,$replace,$url);
echo $url;
echo “
“;
$linkss2 = array_unique($links);
$links=$linkss2;
//counting the no of links
$link2=array($links2);
$count=sizeof($matches[2]);
//Generating links
	for($i=0;$i<$count;$i++)
	{

		$links1=str_split($links[$i]);
		$links2= $links1[0].$links1[1].$links1[2].$links1[3];
		$links3='http';

		if(($links2)==$links3)
		{
 			$link= $links[$i];
		}
		else
		{
 			if(($links1[0]!='/'))
 			{
 				$link= $url.'/'.$links[$i];
 				//To strip session ids
 				$pattern="/\?(.*)/i";
				preg_match($pattern,$link,$matchess);
				//echo $matches[1];
				$length=strlen($matchess[1]);
				//echo $length;
				if($length>17)
				{
				 $patterna=”/\?$matchess[0]/i”;
				 $replace=”\t”;
 				 $link= preg_replace($patterna,$replace,$link);
				}
				else
				{

				}
			}
			else
			{
			   	$link=$url.$links[$i];
 			}
		}
		//printing the link
		echo $link;
		$link1=$link1.” “.$link;
		echo”
“;
	}
//return($link1);
$link1=explode(” “,$link1);
$link1 = array_unique($link1);
print_r($link1);
echo”

“;
?>