PHP Select Form Processing

tjs · #1 (**permalink**) 06-16-09, 04:24 PM

Hey all,

Here's my situation:

I have a form that has 2 select boxes with multiple options.

For the First dropdown, I have assigned IDs to each option (1,2,3,etc)
For the Second dropdown, I have also assigned IDs to each option (01,02,03,etc)

When they choose an option from both select boxes and hit submit, I need to the form to processes the information so it realizes that both a First_id and a Second_id are selected, combines the two together -- $First_id.$Second_id -- and redirect the user to another page.

Hope that makes sense and someone can help me out.
Thanks!

xEX3CUT1ONx · #2 (**permalink**) 06-17-09, 01:17 AM

Seems fairly easy

PHP Code:


			


//Create some new variables



$first = $_POST['first'];

$second = $_POST['second'];



$both_var = $first . $second;



// Redirect (May/May not work)



header('Location:http://www.yoursite.net');

job0107 · #3 (**permalink**) 06-17-09, 02:10 AM

You weren't being very specific, so I can think of at least a couple different possibilities.

Say if you wanted to concatenate id1 and id2 and send the value to another page,
then you may do it like this:

PHP Code:


			
<?php
if(!empty($_POST["id1"]) && !empty($_POST["id2"]))
{
 $id = $_POST["id1"].$_POST["id2"];
 header("location: mypage.php?id=$id");
 }
?>
<html>
<head>
<title></title>
</head>
<body>
<form action="#" method="POST">
First Id: <select name="id1">
<option value="">Select first id ...</option>
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
</select>
<br />
Second Id: <select name="id2">
<option value="">Select second id ...</option>
<option value="01">01</option>
<option value="02">02</option>
<option value="03">03</option>
</select>
<p>
<input type="submit" value="Submit">
</p>
</form>
</body>
</html>

But if you wanted to concatenate id1 and id2 and send the user to a different page depending on the resultant value,
then you could do it like this:

PHP Code:


			
<?php
if(!empty($_POST["id1"]) && !empty($_POST["id2"]))
{
 switch ($_POST["id1"].$_POST["id2"])
 {
  case "101":
   header("location: page1.php");
   break;
  case "102":
   header("location: page2.php");
   break;
  case "103":
   header("location: page3.php");
   break;
  case "201":
   header("location: page4.php");
   break;
  case "202":
   header("location: page5.php");
   break;
  case "203":
   header("location: page6.php");
   break;
  case "301":
   header("location: page7.php");
   break;
  case "302":
   header("location: page8.php");
   break;
  case "303":
   header("location: page9.php");
   break;
  }
 }
?>
<html>
<head>
<title></title>
</head>
<body>
<form action="#" method="POST">
First Id: <select name="id1">
<option value="">Select first id ...</option>
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
</select>
<br />
Second Id: <select name="id2">
<option value="">Select second id ...</option>
<option value="01">01</option>
<option value="02">02</option>
<option value="03">03</option>
</select>
<p>
<input type="submit" value="Submit">
</p>
</form>
</body>
</html>

tjs · #4 (**permalink**) 06-17-09, 02:11 PM

wow thanks that helped alot!

now a follow up:
how do I set it up so that if they only choose one of the options, they are taken to the form page again and asked to choose one of the second options.

I'm assuming it would be something like:
IF id1 is empty then
or
IF id2 is empty then

Thanks you guys have been a great help!

Jcbones · #5 (**permalink**) 06-17-09, 06:25 PM

Untested, but should work.

PHP Code:


			
<?php
if(empty($_POST['id1']) || empty($_POST['id2'])) {
header('Refresh: 5; url=http://site/formpage.php');
print 'You must select both id1 and id2 from the form!';
}
elseif(!empty($_POST["id1"]) && !empty($_POST["id2"]))
{
 switch ($_POST["id1"].$_POST["id2"])
 {
  case "101":
   header("location: page1.php");
   break;
  case "102":
   header("location: page2.php");
   break;
  case "103":
   header("location: page3.php");
   break;
  case "201":
   header("location: page4.php");
   break;
  case "202":
   header("location: page5.php");
   break;
  case "203":
   header("location: page6.php");
   break;
  case "301":
   header("location: page7.php");
   break;
  case "302":
   header("location: page8.php");
   break;
  case "303":
   header("location: page9.php");
   break;
  }
 }
?>
<html>
<head>
<title></title>
</head>
<body>
<form action="#" method="POST">
First Id: <select name="id1">
<option value="">Select first id ...</option>
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
</select>
<br />
Second Id: <select name="id2">
<option value="">Select second id ...</option>
<option value="01">01</option>
<option value="02">02</option>
<option value="03">03</option>
</select>
<p>
<input type="submit" value="Submit">
</p>
</form>
</body>
</html>

ElTorito · #6 (**permalink**) 06-19-09, 09:05 AM

very funny - make a callback - aka name ur functins idproc011.php, idproc021.php etc.

function idproc011();
{
bla, bla,
}

function idproc021();
{
bla, bla,
}

$idselect = "idproc" . $_POST["id1"] . $_POST["id2"];

$idselect(); // this calls function with variable name

Jcbones · #7 (**permalink**) 06-19-09, 04:27 PM

Quote:

Originally Posted by ElTorito

very funny - make a callback - aka name ur functins idproc011.php, idproc021.php etc.

function idproc011();
{
bla, bla,
}

function idproc021();
{
bla, bla,
}

$idselect = "idproc" . $_POST["id1"] . $_POST["id2"];

$idselect(); // this calls function with variable name

Not sure how that is any easier? You will have to do the same checks, and processing. You also will not have a default setting like you will with the switch() function.

job0107 · #8 (**permalink**) 12-03-09, 03:41 PM

We could make Jcbones's version a little more user friendly.

PHP Code:


			
<?php
$options1 = array("1","2","3");
$options2 = array("01","02","03");
if(!empty($_POST["submit"]))
{
 if(empty($_POST['id1']) || empty($_POST['id2'])){echo "You must select both id1 and id2 from the form!";}
 elseif(!empty($_POST["id1"]) && !empty($_POST["id2"]))
 {
  switch ($_POST["id1"].$_POST["id2"])
  {
   case "101":
    header("location: page1.php");
    break;
   case "102":
    header("location: page2.php");
    break;
   case "103":
    header("location: page3.php");
    break;
   case "201":
    header("location: page4.php");
    break;
   case "202":
    header("location: page5.php");
    break;
   case "203":
    header("location: page6.php");
    break;
   case "301":
    header("location: page7.php");
    break;
   case "302":
    header("location: page8.php");
    break;
   case "303":
    header("location: page9.php");
    break;
   }
  }
 }
?>
<html>
<head>
<title></title>
</head>
<body>
<form action="#" method="POST">
First Id: <select name="id1">
<option value="">Select first id ...</option>
<?php
for($i=0;$i<count($options1);$i++)
{
 if(!empty($_POST["id1"]) && $_POST["id1"] == $options1[$i]){echo "<option value='".$options1[$i]."' selected>".$options1[$i]."</option>";}
 else{echo "<option value='".$options1[$i]."'>".$options1[$i]."</option>";}
 }
?>
</select>
<br />
Second Id: <select name="id2">
<option value="">Select second id ...</option>
<?php
for($i=0;$i<count($options2);$i++)
{
 if(!empty($_POST["id2"]) && $_POST["id2"] == $options2[$i]){echo "<option value='".$options2[$i]."' selected>".$options2[$i]."</option>";}
 else{echo "<option value='".$options2[$i]."'>".$options2[$i]."</option>";}
 }
?>
</select>
<p>
<input type="submit" name="submit" value="Submit">
</p>
</form>
</body>
</html>

wirehopper · #9 (**permalink**) 12-03-09, 05:42 PM

Another option:

PHP Code:


			
/* Default page - either the same page, or an error page */

$sPage='default.php';

/* Ensure both ids are set.  It's okay if they are set but empty */

if (isset($_POST['id1']) && isset($_POST['id2']))

{

  $aPageMap=array('101'=>'page1.php',

                                '102'=>'page2.php',

                                '103'=>'page3.php',

                                '201'=>'page4.php',

                                '202'=>'page5.php',

                                '203'=>'page6.php',

                                '301'=>'page7.php',

                                '302'=>'page8.php',

                                '303'=>'page9.php');

  /* Create the array index - it's okay if it is not valid */

  $iPageIndex=$_POST['id1'].$_POST['id2'];

  /* Check to see if the array index is valid, if so, use it */

  if (array_key_exists($iPageIndex,$aPageMap))

    $sPage=$aPageMap[$iPageIndex];

}

/* Go to the page */

header('location: '.$sPage);

This could also be done in javascript, like so:

HTML Code:

<script type="text/javascript">
function go()
{
  var o1=document.getElementById('id1');
  var o2=document.getElementById('id2');
  var i=0;l=o1.options.length;
  for (i=0;i<l;i++)
  if (o1.options[i].selected)
  {
    m=o2.options.length;
    for (j=0;j<m;j++)
      if (o2.options[j].selected)
        location.href=o1.options[i].value+o2.options[j].value;
  }
}
</script>

<!-- Be sure to give the <select> tags ids -->
<select name="id1" id="id1">

...

<select name="id2" id="id2">

...

<button onclick="go()">Go</button>

Not tested.