ค้นหาจาก checkbox หลายๆอันพร้อมกันในฐานข้อมูล คือผมมี check box ประมาณ 16 อัน น่ะครับ คือผมจะตรวจสอบว่าค่าใดถูกเช็คมาแล้วนำไปเป็นเงื่อนไขในการค้นหาน่ะครับ

<?php
$jod_rod=$_REQUEST[jod_rod];
 	 $furniture=$_REQUEST[furniture];  
	 $tel=$_REQUEST[tel];
	 $air=$_REQUEST[air];
	 $pad_lom=$_REQUEST[pad_lom];
	 $ubc=$_REQUEST[ubc];
	 $internet=$_REQUEST[internet];
	 $swim=$_REQUEST[swim];
	 $police=$_REQUEST[police];
	 $key_card=$_REQUEST[key_card];
	 $tv=$_REQUEST[tv];
	 $yod_ren=$_REQUEST[yod_ren];
	 $sak_pa=$_REQUEST[sak_pa];
	 $vong_jorn_pid=$_REQUEST[vong_jorn_pid];
	 $fitnet=$_REQUEST[fitnet];
	 $minimart=$_REQUEST[minimart];  
 
  if($jod_rod !="")
 				{
				print "<font color=blue>jod_rod </font> &nbsp;";
				
				}
				else
				{
				print  "null &nbsp;";
				}
 if($furniture !="")
 				{
				print "<font color=blue>furniture </font> &nbsp;";
				}
				else
				{
				print  "null &nbsp;";
				}
if($tel !="")
 				{
				print "<font color=blue>tel </font> &nbsp;";
				}
				else
				{
				print  "null &nbsp;";
				}
if($air !="")
 				{
				print "<font color=blue>air </font> &nbsp;";
				}
				else
				{
				print  "null &nbsp;";
				}
if($pad_lom !="")
 				{
				print "<font color=blue>pad_lom </font> &nbsp;";
				}
				else
				{
				print  "null &nbsp;";
				}
if($ubc !="")
 				{
				print "<font color=blue>ubc </font> &nbsp;";
				}
				else
				{
				print  "null &nbsp;";
				}
if($internet !="")
 				{
				print "<font color=blue>internet </font> &nbsp;";
				}
				else
				{
				print  "null &nbsp;";
				}
if($swim !="")
 				{
				print "<font color=blue>swim </font> &nbsp;";
				}
				else
				{
				print  "null &nbsp;";
				}
if($police !="")
 				{
				print "<font color=blue>police </font> &nbsp;";
				}
				else
				{
				print  "null &nbsp;";
				}
if($key_card !="")
 				{
				print "<font color=blue>key_card </font> &nbsp;";
				}
				else
				{
				print  "null &nbsp;";
				}												
if($tv !="")
 				{
				print "<font color=blue>tv </font> &nbsp;";
				}
				else
				{
				print  "null &nbsp;";
				}
if($yod_ren !="")
 				{
				print "<font color=blue>yod_ren </font> &nbsp;";
				}
				else
				{
				print  "null &nbsp;";
				}
if($sak_pa !="")
 				{
				print "<font color=blue>sak_pa </font> &nbsp;";
				}
				else
				{
				print  "null &nbsp;";
				}
if($vong_jorn_pid !="")
 				{
				print "<font color=blue>vong_jorn_pid </font> &nbsp;";
				}
				else
				{
				print  "null &nbsp;";
				}
if($fitnet !="")
 				{
				print "<font color=blue>fitnet </font> &nbsp;";
				}
				else
				{
				print  "null  &nbsp;";
				}
if($minimart!="")
 				{
				print "<font color=blue>minimart</font> &nbsp;";
				}
				else
				{
				print  "null &nbsp;";
				}				
?>

<?php
if ($jod_rod !="") { || $furniture !="" || $tel !="" || $air !="" || $pad_lom !="" || $ubc !="" || $internet !="" || $swim !="" || $police !="" || $key_card !="" || $tv !="" || $yod_ren !="" || $sak_pa !="" || $vong_j||n_pid !="" || $fitnet !="" || $minimart !="")
    $condition=" WHERE (jod_rod LIKE '$jod_rod') and (furniture LIKE '$furniture' or tel LIKE '$tel' or air LIKE '$air' or pad_lom LIKE '$pad_lom' or ubc LIKE '$ubc' or internet LIKE '$internet' or swim LIKE '$swim' or police LIKE '$police' or key_card LIKE '$key_card' or tv LIKE '$tv' or yod_ren LIKE '$yod_ren' or sak_pa LIKE '$sak_pa' or vong_jorn_pid LIKE '$vong_jorn_pid' or fitnet LIKE '$fitnet' or minimart LIKE '$minimart')";
	

}

else
	{
	
	$condition=" WHERE (furniture LIKE '$furniture') or (tel LIKE '$tel') or (air LIKE '$air') or (pad_lom LIKE '$pad_lom') or (ubc LIKE '$ubc') or (internet LIKE '$internet') or (swim LIKE '$swim') or (police LIKE '$police') or (key_card LIKE '$key_card') or (tv LIKE '$tv') or (yod_ren LIKE '$yod_ren') or (sak_pa LIKE '$sak_pa') or (vong_jorn_pid LIKE '$vong_jorn_pid') or (fitnet LIKE '$fitnet') or (minimart LIKE '$minimart')";
	}
$sql = "SELECT * FROM ads". $condition;
?>