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Using an "if" statement to direct to a page
Old 10-09-2009, 01:56 PM Using an "if" statement to direct to a page
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I have created a simple form with 3 check boxes and depending on how the boxes are checked I want the individual to be directed to a specific page. Here is the link http://beylahrosenbaum.com/test/ - and the code for this page

Code:
<form action="selection.php" method="post">

<table cellpadding="10" cellspacing="0" border="1">
<tr><td><input name="food" type="checkbox" value="Yes"> &nbsp; <span class="head">Food</span><br /><br /><strong>Includes:</strong> Fruit Tray, Drinks & Snacks</td>

<td><input name="it" type="checkbox" value="Yes"> &nbsp; <span class="head">IT Equipment</span><br /><br /><strong>Includes:</strong> Tele/Video Conferencing, Laptops, Projector & Camera</td>

<td><input name="misc" type="checkbox" value="Yes"> &nbsp; <span class="head">Misc</span><br /><br /><strong>Includes:</strong> Screen & Rearrangment of Furniture</td>

<tr><td colspan="3" align="center"><input onclick="return candosubmit(this.form)" type="image" value="submit" src="images/submit.jpg" border="0"></td></tr>
</table>

</form>
Here is the if statements:

Code:
<?php
if($food=="Yes")
   {
      $value1="1";
   } else {
      $value1="0";
   }   
if($it=="Yes")
   {
      $value2="3";
   } else {
      $value2="0";
   }   
if($misc=="Yes")
   {
      $value2="5";
   } else {
      $value2="0";
   }   

if($value1 + $value2 + $value3 ="1")
{ include("form-1.html"); }

elseif($value1 + $value2 + $value3 ="3")
{ include("form-2.html"); }

elseif($value1 + $value2 + $value3 ="5")
{ include("form-3.html"); }

elseif($value1 + $value2 + $value3 ="9")
{ include("form-4.html"); }

elseif($value1 + $value2 + $value3 ="4")
{ include("form-5.html"); }

elseif($value1 + $value2 + $value3 ="8")
{ include("form-6.html"); }

elseif($value1 + $value2 + $value3 ="6")
{ include("form-7.html"); }

?>
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Old 10-09-2009, 02:19 PM Re: Using an "if" statement to direct to a page
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Location: Germany
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PHP Code:
<?php
$food 
$_POST['food'];
$it $_POST['it'];
$misc $_POST['misc'];

if(
$food=="Yes")
   {
      
$value1=1;
   } else {
      
$value1=0;
   }   
if(
$it=="Yes")
   {
      
$value2=3;
   } else {
      
$value2=0;
   }   
if(
$misc=="Yes")
   {
      
$value3=5;
   } else {
      
$value3=0;
   }   

if(
$value1 $value2 $value3 ==1)
{ include(
"form-1.html"); }

elseif(
$value1 $value2 $value3 ==3)
{ include(
"form-2.html"); }

elseif(
$value1 $value2 $value3 ==5)
{ include(
"form-3.html"); }

elseif(
$value1 $value2 $value3 ==9)
{ include(
"form-4.html"); }

elseif(
$value1 $value2 $value3 ==4)
{ include(
"form-5.html"); }

elseif(
$value1 $value2 $value3 ==8)
{ include(
"form-6.html"); }

elseif(
$value1 $value2 $value3 ==6)
{ include(
"form-7.html"); }

?>
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Old 10-09-2009, 06:26 PM Re: Using an "if" statement to direct to a page
lizciz's Avatar
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Posts: 744
Name: Mattias Nordahl
Location: Sweden
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Try this.

PHP Code:
<?php

$food 
= isset($_GET['food']) ? 0;
$it = isset($_GET['it']) ? 0;
$misc = isset($_GET['misc']) ? 0;

$sum food it misc;

$redirect = array(
   
=> "page for none selcted",
   
=> "page for only food selcted",
   
=> "page for only it selcted",
   
=> "page for only misc selcted",
   
=> "page for food and misc selcted",
   
=> "page for it and misc selcted",
   
=> "page for all selcted",
);

include(
$redirect[$sum]);

// Or, if you actually want to redirect, not just include the page,
// uncomment this line
// header("Location: " . $redirect[$sum]);

?>
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Last edited by lizciz; 10-13-2009 at 07:12 PM..
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Old 10-13-2009, 09:42 AM Re: Using an "if" statement to direct to a page
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delete

Last edited by beylah; 10-13-2009 at 10:08 AM..
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Old 10-13-2009, 09:55 AM Re: Using an "if" statement to direct to a page
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delete

Last edited by beylah; 10-13-2009 at 10:09 AM..
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Old 10-13-2009, 10:01 AM Re: Using an "if" statement to direct to a page
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I used Trey - thank you thank worked - if I may ask a question:

I understand now that I needed to post the results first - makes sense

my question is when do you use the == and when do you use the =

i see you had to correct that for me

Last edited by beylah; 10-13-2009 at 10:05 AM..
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Old 10-13-2009, 07:11 PM Re: Using an "if" statement to direct to a page
lizciz's Avatar
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Name: Mattias Nordahl
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You use a single = to assign a value to a variable, as in
$x = 3;

You use double == to compare two values, to see if they are equal, as in

$x == 3 will be true
$x == 4 will be false

So by using a single = in an if() statement like so

if ($x = 4) {...}

means you assign the value 4 to $x, regardless of it's previous value, and if the operation is succesfull (which it always is) it will return true and the if() statement will always run.

There is also a third operator with three ===, which takes variable types into account when comparing. This should show the difference.

PHP Code:
$x 3// the number 3
$y '3'// the string '3'

if ($x == $y) {
   
// this is true
}
if (
$x === $y) {
   
// this is false

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Old 10-13-2009, 07:26 PM Re: Using an "if" statement to direct to a page
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Quote:
Originally Posted by lizciz View Post
means you assign the value 4 to $x, regardless of it's previous value, and if the operation is succesfull (which it always is) it will return true and the if() statement will always run.
That's not 100% true. The return value of an assignment is the value being assigned. The following code will echo 'One':
PHP Code:
if($x NULL)
  echo 
'Null';
else if(
$x 0)
  echo 
'Zero';
else if(
$x '')
  echo 
'Empty String';
else if(
$x 1)
  echo 
'One'
This is because in PHP false == NULL == '' == 0.
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Old 10-14-2009, 09:14 AM Re: Using an "if" statement to direct to a page
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thank you all for you help - this makes sense now
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