PHP5 Help

After I upgraded to PHP5 this fuction no longer works, anyone have any idea why?

function members_online()	{
	$m_id=cookie_get("mem_id");
	$m_pass=cookie_get("mem_pass");
	login_test($m_id,$m_pass);
	$page=form_get("page");
	if(empty($page))	$page=1;
	$start=($page-1)*20;
	$sql_query="select mem_id from members where online='on' limit $start,100";
	$res=sql_execute($sql_query,'res');
	$p_sql="select mem_id from members where online='on'";
	$p_url="index.php?mode=user&act=onlines";
	show_header();
?>
<table width="100%" border="0" cellspacing="0" cellpadding="0" class="body lined">
  <tr>
    <td class="title">&nbsp;Online Members</td>
  </tr>
<? if(mysql_num_rows($res)) { ?>
<? $s=0; ?>
  <tr>
    <td class="body"><table width="100%" border="0" cellspacing="0" cellpadding="0">
<? while($row==mysql_fetch_object($res)) { ?>
<? if($s==0) { ?>
        <tr>
<? } ?>
          <td valign="top" align="center" class="body"><b><? echo jans($row->mem_id, gender); ?></b></td>
<? $s++; ?>
<? if($s==5) { ?>
        </tr>
<? $s=0; ?>
<? } ?>
<? } ?>
      </table></td>
  </tr>
  <tr>
    <td class="body" align="right"><? echo page_nums($p_sql,$p_url,$page,20); ?>&nbsp;&nbsp;</td>
  </tr>
<? } else { ?>
  <tr>
    <td class="body" align="center">No members are online now!</td>
  </tr>
<? } ?>
</table>
<?
	show_footer();
}

PHP:

Thanks..

 

oh could be dozen of things!
is your php compiled with mysql extensions?? (mysql doesnt come by default with php5 btw)

look into phpinfo for above

also look into objects, and PDO for data acces, heres sample from my php5 user class (notice bound parameters )

also look into MVC pattern

	/**
	 * retrieves a user
	 *
	 * @param int, $user_id
	 * @param string, $user_hash
	 */
	public function retriveByUserIdAndHash( $user_id, $password ){
		
		
		try {
			$STMT = $this->DB->prepare("SELECT username, group_id, password
										FROM users 
										WHERE user_id = :user_id  
										AND password = :password" );
			
	
	
			$STMT->bindParam( ":user_id", 	$user_id,	PDO::PARAM_INT );
			$STMT->bindParam( ":password", 	$password,  PDO::PARAM_STR, 32);

			
			$STMT->execute();
		
			$user	=	$STMT->fetch(PDO::FETCH_ASSOC);
		} 
		catch (PDOException $e) {
	   
			Base::handleException($e);
		}
		
		return $user;
	}

PHP:

 

Do you get any errors? If not, try putting

error_reporting(E_ALL);

PHP:

at the top of the PHP file. You should get some line numbers then. Or you can try some 'blah debugging' ( © Coderlinks ) . You put

echo 'blah';exit;

PHP:

at different places and you can find out exactly where the error occurs.

Thomas