Image search program

Please how can i further make the code below to search for images. The program can currently search for titles, descriptions and their urls but i need to also include an image search capability to it. I need some help please.......

index.php

<form action = 'search.php method = 'GET''>

        <font face = 'sans serif' size = '5'> <center>

        My Search Engine<br>

        <input type = 'text' size = '50' name = 'search'> <input type = 'submit' name= 'submit' value = 'search'> 
        

        </center>
        </font>
   </form>
  </html>

PHP:

search.php

<style type="text/css">
body {
        background-color: #FFF;
}
</style>
<?php

//get data
$button = $_GET['submit'];
$search = $_GET['search'];
$x = "";
$construct = "";
if (!$button){
        echo "You didint submit a keyword.";
}
else{
        if (strlen($search)<=2) {
                echo "Search term too short.";
        }
        else {
                echo "You searched for <b>$search</b><hr size='1'>";
                
                //connect to database
                mysql_connect("localhost","root","");
                mysql_select_db("searchengine");
                
                
                        
                        //explode our search term
                        $search_exploded = explode(" ",$search);
                        
                        foreach($search_exploded as $search_each) {
                                
                                //constuct query
                                $x++; 
                                if ($x==1) {
                                        $construct .= "keywords LIKE '%$search_each%'";
                                }
                                else {
                                        $construct .= " OR keywords LIKE '%$search_each%'";
                                }
                        }
                        
                        //echo out construct
                        
                        $construct = "SELECT * FROM searchengine WHERE $construct";
                        $run = mysql_query($construct) or die(mysql_error());
                        
                        $foundnum = mysql_num_rows($run);
                        
                        if ($foundnum==0) {
                                echo "No results found."; 
                        }
                        else {
                                echo "$foundnum results found!<p>";
                                while ($runrows = mysql_fetch_assoc($run)) {
                                        //get data
                                        $title = $runrows['title'];
                                        $desc = $runrows['description'];
                                        $url = $runrows['url'];
                                        
                                        echo "
                                        <b>$title</b><br>
                                        $desc<br>
                                        <a href='$url'>$url</a><p>
                                        ";
                                }
                        }
        }
}

PHP:

 

Your database should have urls as well...