<?php
   $dbhost = 'localhost';
   $dbuser = 'my user name';
   $dbpass = 'my password';

   $conn = mysql_connect($dbhost, $dbuser, $dbpass);

   if(! $conn ) {
      die('Kan geen connectie maken: ' . mysql_error());
   }

   $sql = 'SELECT lead_content FROM wp_wgbsupicrm_leads';
   mysql_select_db('my database name');
   $retval = mysql_query( $sql, $conn );

   if(! $retval ) {
      die('Kan geen gegevens vinden: ' . mysql_error());
   }

   while($row = mysql_fetch_array($retval, MYSQL_ASSOC)) {
      echo "EMP ID :{$row['lead_content']}  <br> ".
         "--------------------------------<br>";
   }

   echo "Gegevens ontvangenn";

   mysql_close($conn);
?>

$sql = "SELECT lead_content FROM wp_wgbsupicrm_leads' where lead_content='$data'";