[RESOLVED] Basic hpml php interaction

zenix

Hi, in my quest to learn php well, I have chosen to learn from several places of info. and samples. At the moment all I am attempting to do is use a very basic HTML form and send the data to a basic php page. In all the samples I have seen (all done pretty much the same way) it works, but of course not for me. I have even gone as far as copying the code for the 2 files exactly as in one of the samples. Just to get it to work. No good. It appears the field values are not being received by my php page leading me to get the error, "Notice: Undefined index:". This error shows for all the form fields. If someone could help me out I would REALLY appreciate it so much! The code for the 2 files is below:

#
#  
# <head>        
# <title>Test form</title>  
# </head>
# <body>
# Please fill out this form to calculate total <br />
# <br />
#  
# <form action = "calc.php" method = "GET">
# Price:<input type = "text" name = "price" size = "10" />
# <br /> <br />
# Quantity:<input type = "text" name = "quantity" size = "10" />
# <br /><br />
#  Tax:<input type ="text" name = "tax" size = "3" />
#  <br /><br />
#  Discount:<input type ="text" name = "Discount" size = "3" />
#  Shipping method<select name ="shipping">
#  <option value ="$5.00">Slow and steady</option>
#  <option value ="$8.95">Put a move on it!</option>
#  <option value ="$20.00">I need it yesterday!!</option>
#  </select>
#   <input type="hidden" name="SubmitCheck" value="sent" />
#  <br />
#  <br />
#  Number of payments to make: <input type ="text" name = "payments" size = "3" />
#  <br /><br />
#  <input type = "submit" name = "submit" value = "calculate!" />
#  </form>
#  </body>
#  </html>

The php page looks like this:

#  
# [code=text] 
# <head>
# <title>Calculate the input</title>
# </head>
# <body>
# <?php  
# //in case register globals is disabled
#  
# $price = $_POST['price'];
# $quantity = $_POST['quantity'];
# $discount = $_POST['discount'];
# $tax = $_POST['tax'];
# $shipping = $_POST['shipping'];
# $payments = $_POST['payments'];
#  
# //Calculate
# $total = $price * $quantity;
# $total = $total + $shipping;
# $total = $total - $discount;
#  
# //determine tax rate
# $taxrate = $tax/100;
# $taxrate = $taxrate + 1;
#  
# //factor in tax
# $totale = $total * $taxrate;
#  
# //Calculate monthly payments
# $monthly = $total/payments;
#  
# //print results
# print "You have selected to purchae: <br />
#        <b>$quantity</b> Thing(s) at <br />
#        $<b>$price</b>. Shipping will be
#        $<b>$shipping</b> and the sales tax
#        for this purchase is<b>$tax</b><br />
#        After your$<b>$discount</b> discount,
#        the total cost is $<b>$totale</b>. <br />
#        Divided over <b>$payments</b> monthly payments
#        , that would be<b>$monthly</b> each!";
# ?>
# </body>
# </html>

djjjozsi

lets introduce the form first.

in the method, you can set the form sending method,
<form action = "calc.php" method = "GET">

in this case you reach the variables with a $GET array on the next page:
You can set it into POST, and you reach the variables in $POST["variable_name"]
and don't forget to use a " sign.

at the very beggining of your php file put this after the <?php block

error_reporting(E_ERROR | E_PARSE);
//error_reporting(E_ALL);
ini_set("display_errors", 1);

that means, it will only alert you with a message if a parse or another error is in your program.

If you use E_ALL, will shows you the warnings and evry errors...
Its not a bad thing, its good to you if you debug an error, for example:
$monthly = $total/payments;

payments is not a variable, but you want to divide with it...

Warning, if you use an undefined variable, for example:
print $_POST['price']; // if this variable did not get a value, that cause undefined index

To use it not to warn you, before you use a variable, lets check if it has set before,

if(isset($POST['price')])
$price=$POST['price'];

zenix

Oh boy...The GET method I placed in my form was just for experimenting, since the original post didn't work as it should. Sorry about that. Naturally upon changing the post to get I changed the variables in the php file to $_GET. No matter what I do it just doesn't work for me.

I placed the error code you suggested at the top of the php and as you said there are no more warnings, but there is no data being populated into the variables.

Thanks an awful lot for your time, I'm GOING to get this....apparently it's just going to take a little longer than I thought.

zenix

Just curious, is that code generator site in your tag yours? Quite a cool looking site! I wish I could read the language.

djjjozsi

at the top(left) lets press English.
i'm working on the translation.
🙂

zenix

I'm an idiot, thanks. Any other thoughts on my problem here? It's really frustrating, it doesn't make sense it's not working.

djjjozsi

you wrote with a lowercase the discount.
use POST,

and into shipping, you set a value startint with $. that is not a number, that is a string,
and with this the php could not operate. i put away that.

http://phpcode.hu/phpgenerator2/dictionary/calc/calc.html.rar

zenix

They are all lower case, I am using post and shipping is set to be a string on purpose. None of the values are being passed to me php page. This is what is hanging me up and not making sense.

<?php 
error_reporting(E_ERROR | E_PARSE);
//error_reporting(E_ALL);
ini_set("display_errors", 1); 
//in case register globals is disabled

$price = $_POST['price'];
$quantity = $_POST['quantity'];
$discount = $_POST['discount'];
$tax = $_POST['tax'];
$shipping = $_POST['shipping'];
$payments = $_POST['payments'];


//Calculate
$total = $price * $quantity;
$total = $total + $shipping;
$total = $total - $discount;

//determine tax rate
$taxrate = $tax/100;
$taxrate = $taxrate + 1;

//factor in tax
$total = $total * $taxrate;

//Calculate monthly payments
$monthly = $total/payments;

//print results
print "You have selected to purchase: <br />
       <b>$quantity</b> Thing(s) at <br />
       $<b>$price</b>. Shipping will be
       $<b>$shipping</b> and the sales tax
       for this purchase is<b>$tax</b><br />
       After your$<b>$discount</b> discount,
       the total cost is $<b>$totale</b>. <br />
       Divided over <b>$payments</b> monthly payments
       , that would be<b>$monthly</b> each!";
?>

<head>         

<title>Test form</title>  

</head>
<body>
Please fill out this form to calculate total <br />
<br />

<form action="calc.php"method="post">
Price:<inputtype="text"name="price"size="10" />
<br /> <br />
Quantity:<input type="text"name="quantity"size="10" />
<br /><br />
 Tax:<input type="text"name="tax"size="3" />
 <br /><br />
 Discount:<input type="text"name="discount"size="3" /> 
 Shipping method<select name="shipping">
 <option value="$5.00">Slow and steady</option>
 <option value="$8.95">Put a move on it!</option>
 <option value="$20.00">I need it yesterday!!</option>
 </select>
  <input type="hidden"name="SubmitCheck"value="sent" />
 <br />
 <br />
 Number of payments to make:<input type="text"name="payments"size="3" />
 <br /><br />
 <input type ="submit"name="submit"value="calculate!" />
 </form>
 </body>
 </html>

djjjozsi

in your php...

$monthly = $total/payments; <------------ you forget a $ before payment...

and in your html file,

Shipping method<select name="shipping">
<option value="$5.00">Slow and steady</option>
<option value="$8.95">Put a move on it!</option>
<option value="$20.00">I need it yesterday!!</option>

you can see the $ signs.. do not use them as a value...

php could not able to use the add (+) operation
$total = $total + $shipping;
tham mean, $total+ "$8.95" ; <<---- it has no sence...

and i sent you a link, from that you can download a working version...

zenix

I REALLY appreciate all your time in helping me. I made the changes and the values are still just not being sent to the php page. I ran your sample (thanks a lot!) and when I fill in the values on the html page then submit it, the page that is displayed next shows only all of the php code.

zenix

I got it to work by copying your code and asting it into my php editor, thank you so much for your time and patience!!!!!

laserlight

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djjjozsi

when i start clean your code, i clear the # signs first.

and lets change your php html editor.

hello,

jjozsi

zenix

Thanks an awful lot for all your help again!!

djjjozsi

not at all,

hi!

jjozsi