[Resolved] Passing variables from form

maegg

This is my first attempt at posting from a form with php. I'm not doing so well with it. I have a form that user enters numbers they received from blood tests 1 and 2 and the days apart the test was done. It calculates the time it takes for hcg (a pregnancy hormone) to double. It also provides a daily increase rate. I did the hcgcalc.php page first and when I write the variables and their values on this page it calculates perfectly but since I need user input I made hcgview.php to hold the form and I'm also trying to have results returned to this page. I've been COMPLETELY unsuccessful at passing the variables or getting them back. I've tried passing through a url and using $_post and I've also tried HTTP POST too. No avail. I'm sure I'm doing something pretty stupid since I'm not a programmer IRL, I only play one on the internet 😃

I wouldn't even mind if I could get all this on one page but I couldn't figure that out either.

Here is code for hcgview.php which holds the form:

<?php include('../menu.php'); ?>
<?php include('hcgcalc.php'); ?>
<?php
chelle_css()
?>

</head>
<body background="/images/mol.gif">
<center><table width="90%" bgcolor="#9EC2E5" cellspacing="0" cellpadding="5" border="0">
<tr colspan="2">
<td background="/images/mol.gif"> 
<?php
chelle_header()
?>

<a href="/"><img src="/images/logo_phpBB.gif" width="300" height="109" alt="Womens-Place" border="0" align="left"></a></td>
<td background="/images/mol.gif">&nbsp;</td>

</tr>
<tr>
<td>

<form method="POST" name="hcgcalc.php">
<div align="left"><table border="2" bordercolor="#000000"
bordercolordark="#356A6A" bordercolorlight="#5FAFAF">
<tr>
<td><font face="Arial">First HCG Level</font></td>
<td align="right"><font face="Arial"><input
type="text" size="6" name="beta1" ></font></td>
<td><font face="Arial">mIU/mL</font></td>
</tr>
<tr>
<td><font face="Arial">Second HCG Level</font></td>
<td align="right"><font face="Arial"><input
type="text" size="6" name="beta2"
></font></td>
<td><font face="Arial">mIU/ml</font></td>
</tr>
<tr>
<td><font face="Arial">Days Between Tests</font></td>
<td align="right"><font face="Arial"><input
type="text" size="5" name="days"
></font></td>
<td><font face="Arial">days</font></td>
</tr>
<tr><td><input type="submit" value="calculate">
</td></tr>
</table>
</div>
</form><br>
<br>
<?php
dblcalc ()
?>
<br>
<?php
dailyinc ()
?>
</td>
<td> </td>
</tr>

</table></center>
<?php
chelle_header()
?>
<?php
copyright()
?>

</center>

</body>
</html>

Here is the url to see what that returns:

hcgview

Here is hcgcalc.php

<?php
$beta1 = $POST['beta1'];
$beta2 = $POST['beta2'];
$days = $_POST['days'];
function dblcalc ()
{
if (($beta1 > 0) && ($beta2 > 0) && ($beta1 < $beta2) && ($days > 0))
$dbltime = ($days * 24) / (log($beta2/$beta1) / log(2));
echo round($dbltime, 1);
}
function dailyinc ()
{
if (($beta1 > 0) && ($beta2 > 0) && ($beta1 < $beta2) && ($days > 0))
$dayincrate = pow($beta2/$beta1, 1/$days);
echo round ($dayincrate, 2);
}
?>

Any help on this would be appreciated.

OhLordy

try doing print_r($_POST);
this will print out a human readable explanation of a variable(or an array) so you can see if the data is being sent through to the script.
HTH
Rob

maegg

I did that and it was passing them fine. I just went and changed a few things. Changed method to Get and added Action (this was one of my problems). Now it is working better but the calculation is wrong once variables are passed. Here is an example:

hcgview form

If you enter in 30, 100, and 3 in the fields in that order and calculate, it goes correctly to hcgcalc.php and you can see the values in the url. The calculation however comes back as 0 and 1. I had suppress browser errors that didn't like a 0 calculation.

Now if you take the hcgcalc.php and just put the values into the calculation then the calculation is correct again. Here is a page that I threw that into with the variables having those same values but they aren't being passed I've defined them at the beginning of the script. Hope that made sense. When I do that, here is the correct result:

Revised hcgcalc

I know I'm really close to getting this correct but I am currently stumped. Why the difference? If you see the values in the url then they are being passed....correct? Appreciate the help in advance.

batman

If you are passing the variables through the url, then you will have to use $GET instead of $POST. 🙂 Or if you aren't sure how your passing it, then you can use $_REQUEST. That will bring back variables that are either post or get method.

kevinsequeira

Here is hcgcalc.php

<?php
$beta1 = $_POST['beta1'];
$beta2 = $_POST['beta2'];
$days = $_POST['days'];
function dblcalc ()
{
if (($beta1 > 0) && ($beta2 > 0) && ($beta1 < $beta2) && ($days > 0))
$dbltime = ($days * 24) / (log($beta2/$beta1) / log(2));
echo round($dbltime, 1);
}
function dailyinc ()
{
if (($beta1 > 0) && ($beta2 > 0) && ($beta1 < $beta2) && ($days > 0))
$dayincrate = pow($beta2/$beta1, 1/$days);
echo round ($dayincrate, 2);
}
?>

u have declared the functiond but not called it ??

also u need to pass the values of $beta1, $beta2, $days into the function like so

function dblcalc ($beta1,$beta2,$days)
{
.
.
.
}
function dailyinc ($beta1,$beta2,$days)
{
.
.
..
}
reg
kevin

maegg

Here is the form code:

<form method="GET" name="hcgcalc" action="hcgcalc.php">
<div align="left"><table border="2" bordercolor="#000000"
bordercolordark="#356A6A" bordercolorlight="#5FAFAF">
<tr>
<td><font face="Arial">First HCG Level</font></td>
<td align="right"><font face="Arial"><input
type="text" size="6" name="beta1" ></font></td>
<td><font face="Arial">mIU/mL</font></td>
</tr>
<tr>
<td><font face="Arial">Second HCG Level</font></td>
<td align="right"><font face="Arial"><input
type="text" size="6" name="beta2"
></font></td>
<td><font face="Arial">mIU/ml</font></td>
</tr>
<tr>
<td><font face="Arial">Days Between Tests</font></td>
<td align="right"><font face="Arial"><input
type="text" size="5" name="days"
></font></td>
<td><font face="Arial">days</font></td>
</tr>
<tr><td><input type="submit" value="calculate">
</td></tr>
</table>
</div>
</form>

Here is the hcgcalc.php code:

<?php
if (($beta1 > 0) && ($beta2 > 0) && ($beta1 < $beta2) && ($days > 0))
$dbltime = ($days * 24) / (log($beta2/$beta1) / log(2));
echo ("Your HCG Doubling Time is ");
echo round($dbltime, 1);
echo ("<br><br>");
$dayincrate = @pow($beta2/$beta1, 1/$days);
echo ("Your daily increase rate is ");
echo round($dayincrate, 2);
?>

Here is same code with variables defined and correct calc (in other words it works):

<?php
$beta1=30;
$beta2=100;
$days=3;
if (($beta1 > 0) && ($beta2 > 0) && ($beta1 < $beta2) && ($days > 0))
$dbltime = ($days * 24) / (log($beta2/$beta1) / log(2));
echo ("Your HCG Doubling Time is ");
echo round($dbltime, 1);
echo ("<br><br>");
$dayincrate = @pow($beta2/$beta1, 1/$days);
echo ("Your daily increase rate is ");
echo round($dayincrate, 2);
?>

I may not be the best programmer but I'm darn persistent!!! LOL.

Thanks again!

kevinsequeira

u havent passed the values $beta1, $beta2, $days into the function

u need to pass the values of $beta1, $beta2, $days into the function like so

function dblcalc ($beta1,$beta2,$days)
{
.
.
.
}
function dailyinc ($beta1,$beta2,$days)
{
.
.
..
}

and call them like this

dblcalc ($beta1,$beta2,$days);
dailyinc ($beta1,$beta2,$days);

reg
kevin

maegg

THANKYOU!!! The $_Get on the hcgcalc page solved the problem. I've learned soooooo much today. Truly appreciate ya'll looking at my code and helping. 😃

I'm just so proud of myself now that this works!! 😃 😃