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Dynamic Form

Thread began 3/11/2015 6:47 pm by Kumel | Last modified 3/12/2015 1:45 pm by Kumel | 825 views | 8 replies |

Kumel

Dynamic Form

Hi i was thinking how can we make a form where values are added in each form fields.

Its just like giving visitor a quotation or so depending upon options choosen.
Multiple form fields will be present.


Regards

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Jason ByrnesWebAssist

you would need to have code the functionality to process the form input.

for example, if you have 2 form fields named element1 and element2. and each of these takes a numeric input, you can do simple math using the post:

<?php echo($_POST['element1'] + $_POST['element2']); ?>

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Kumel

How to display results?

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Jason ByrnesWebAssist

<?php echo($_POST['element1'] + $_POST['element2']); ?>

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Kumel

this is my current form:

<form id="form1" name="form1" method="post" action="">
<p>
<label for="element1"></label>
x:
<input type="number" name="element1" id="element1" />
<br />
y:

<label for="element2"></label>
<input type="number" name="element2" id="element2" />
</p>
<p><strong>x+y=z</strong></p>
<p>z: <?php echo($_POST['element1'] + $_POST['element2']); ?>
</p>
</form>



i get errors as such:


Notice: Undefined index: element1 in /Applications/XAMPP/xamppfiles/htdocs/esskaybee/test.php on line 21

Notice: Undefined index: element2 in /Applications/XAMPP/xamppfiles/htdocs/esskaybee/test.php on line 21
0


line 21 codes: <p>z: <?php echo($_POST['element1'] + $_POST['element2']); ?>

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Jason ByrnesWebAssist

you have to submit the form

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Kumel

cool. but error still seem to appear.

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Jason ByrnesWebAssist

you don't have a submit button in your form, so no way to submit it. you will need to add a submit button

you can add an if statement around the echo so it only shows when the form is submitted:

<?php if($_SERVER['REQUEST_METHOD'] == "POST") { ?>
<p>z: <?php echo($_POST['element1'] + $_POST['element2']); ?>
<?php } ?>

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Kumel

thanks a lot (y)

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