title: PHP Post empty then assign default value
body: <p>I have a search query that returns a results page that works great, if it receives data from the form. But if a user goes directly to the results page (they bookmarked the page) I want them to see all the results. The search is by day of the week and area . Can I default the day to the current day date("l") and the Area variable to Entire City? Code is below:</p>
  
  <pre><code>require("dbinfo.php");
  
  $Area=$_POST['Area'];
  $Day=$_POST['Day'];
  $ID=$_POST['ID'];
  
  
  include("History.php");
  $con = mysql_connect('localhost', $username, $password );
  if (!$con)
  {
  die('Could not connect: ' . mysql_error());
  }
  $db_selected = mysql_select_db($database, $con);
  if (!$db_selected) {
  die ('Can\'t use DB : ' . mysql_error());
  }
  $sql = "SELECT 
  `ID`,`Name`,`Address`,`".$Day."`,`Area`,`PhoneNumber`,`logo`,`Website` FROM 
  `JaxPlaces` WHERE (Area = '".$Area."' OR '".$Area."' = 'Entire City') and 
  Status = 'active' and ".$Day." NOT LIKE 'NULL' ORDER BY Name;";
  $result = mysql_query($sql);
  if(!$result)
  {
  
   }  
  </code></pre>