Search problem

-----------------------------------
links.php
-----------------------------------
					<?php 
					$host="";
					$user="";
					$password="";
					$dbname="";
				
					$cxn = mysqli_connect($host,$user,$password,$dbname) or die ("Could not connect to server.  Please try again later.");
					
					echo "<form action='process_form.php' method='POST'>\n";
						echo "<table cellspacing='20'>";
							echo "<tr>\n
								<td><input type='checkbox' name='all' value='All'/> All</td>\n
								<td><input type='checkbox' name='developer' value='Developer'/> Developer</td>\n
								<td><input type='checkbox' name='devpub' value='Developer/Publisher'/> Developer/Publisher</td>\n
								<td><input type='checkbox' name='internship' value='Internship'/> Internship</td>\n
								<td><input type='checkbox' name='investor' value='Investor'/> Investor</td>\n
								<td><input type='checkbox' name='mobiphone' value='Mobile/iPhone'> Mobile/iPhone</td>\n
								<td><input type='checkbox' name='online' value='Online'/> Online</td>\n
							</tr>\n";
							echo "<tr>\n
								<td><input type='checkbox' name='organisation' value='Organisation'/> Organisation</td>\n
								<td><input type='checkbox' name='publisher' value='Publisher'/> Publisher</td>\n
								<td><input type='checkbox' name='qamid' value='QA/Middleware'/> QA/Middleware</td>\n
								<td><input type='checkbox' name='recruiter' value='Recruiter'/> Recruiter</td>\n
							</tr>\n";
 
							echo"</table>\n";
							echo "<div align='center'><p><input type='submit' value='Search'</p></div>
						</form>\n";
					?>
 
 
 
 
 
-----------------------------------
process_form.php
-----------------------------------
$host="";
$user="";
$password="";
$dbname="";
 
$cxn = mysqli_connect($host,$user,$password,$dbname) or die ("Could not connect to server.  Please try again later.");
 
foreach ($_POST as $field => $value){
			$query = "SELECT * FROM links WHERE type='$value'";
			$result = mysqli_query($cxn,$query) or die ("Couldn't excute query");
		}
 
		$search = $value;
 
		if ( $search == "All" ) {
			$query = "SELECT * FROM links ORDER BY name";
		}
		else{
			$query = "SELECT * FROM links WHERE type='$search' ORDER BY name";
		}
 
		$result = mysqli_query($cxn,$query) or die ("Couldn't excute query");
		
		if ($search == "All"){
			$page_header = ucfirst($search);
		}
		else{
			$page_header = ucfirst($search)."s";
		}

                                  

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