Slow getimagesize from local server
===

I am trying to fetch image from few external sites as I’m trying to develop link sharing website for my project. I downloaded file with curl to local server but getimagesize is still very slow (30 seconds). I’m a newbie to php any help would be appreciated. 
Here is the code: 
    <?php
    $url = trim($_REQUEST['url']);
    $url = check_url($url);

    function check_url($value)
    {
	$value = trim($value);
	if (get_magic_quotes_gpc()) 
	{
		$value = stripslashes($value);
	}
	$value = strtr($value, array_flip(get_html_translation_table(HTML_ENTITIES)));
	$value = strip_tags($value);
	$value = htmlspecialchars($value);
	return $value;
    }	

    $curl = curl_init();
	
	$temp_file = tempnam(sys_get_temp_dir(), 'link');
    $fp = fopen($temp_file, "w");
    curl_setopt ($curl, CURLOPT_URL, $url);
    curl_setopt($curl, CURLOPT_FILE, $fp);

    curl_exec ($curl);
	curl_close($curl);
    
    ///
    $html = file_get_contents($temp_file);
    fclose ($fp);
    unlink($temp_file);

    if($html) {
    //parsing begins here:
    $doc = new DOMDocument();
    @$doc->loadHTML($html);
    $nodes = $doc->getElementsByTagName('title');

     //get and display what you need:
     $title = $nodes->item(0)->nodeValue;
     $metas = $doc->getElementsByTagName('meta');

     for ($i = 0; $i < $metas->length; $i++)
     {
     $meta = $metas->item($i);
     if($meta->getAttribute('name') == 'description')
     $description = $meta->getAttribute('content');
     }

     // fetch images
     $image_regex = '/<img[^>]*'.'src=[\"|\'](.*)[\"|\']/Ui';
     preg_match_all($image_regex, $html, $img, PREG_PATTERN_ORDER);
     $images_array = $img[1];

     ?>
     <div class="images">
	<?php
     $k=1;
     for ($i=0;$i<=sizeof($images_array);$i++)
    {
	if(@$images_array[$i])
	{
		if(@getimagesize(@$images_array[$i]))
		{
			list($width, $height, $type, $attr) =   getimagesize(@$images_array[$i]);
			if($width >= 80 && $height >= 80 ){
 
			echo "<img src='".@$images_array[$i]."' width='100' id='".$k."' >";
 
			$k++;
			}
		}
	}
    }

	?>
	
	
	
	
	<input type="hidden" name="total_images" id="total_images" value="<?php echo --$k?>" />
	</div>
	<div class="info">
		
		<label class="title">
			<?php  echo @$title; ?>
		</label>
		<br clear="all" />
		<label class="url">
			<?php  echo substr($url ,0,35); ?>
		</label>
		<br clear="all" /><br clear="all" />
		<label class="desc">
			<?php  echo @$description; ?>
		</label>
		<br clear="all" /><br clear="all" />
		
		<label style="float:left"><img src="prev.png" id="prev" alt="" /><img src="next.png" id="next" alt="" /></label>
		
		<label class="totalimg">
			Total <?php echo $k?> images
		</label>
		<br clear="all" />
		
    </div>
    <?php
    } else {
    echo "Please enter a valid url";
    }
    ?>