How to get form output value on same HTML form page?

Question

I am looking to submit a HTML form file (home.html) with PHP action file (action.php) to display the output on same home.html file after processing through action.php.

I got many scripts solving this problem with .php file, Is it possible to do the same with HTML?

home.html

<form action="action.php" method="post">
Enter Numeric Value: <input type="number" name="num">
<input type="Submit" value="Calculate">
</form>

action.php

<?php 
    $a=$_POST["num"];
    echo "Contact our sales person for higher volume of Emails";
?>

"to display the output on same home.html file" - You can't do that, unless you instruct Apache to treat .html files as PHP. Otherwise, you'd need to use an iframe, or rename your .html to .php — Funk Forty Niner
– Funk Forty Niner, Commented May 22, 2014 at 13:28

Oliver Bayes-Shelton · Accepted Answer · 2014-05-22 13:32:27Z

1

Modify your home file into a PHP file and point the form action to it, then you can simply use the POST/GET data and display it on the page:

I have added the use of "htmlentities" to more it a little more secure

home.php

<?php

    if(isset($_POST['num']))
    {
        echo htmlentities($_POST['num']);
    }

?>

<form action="home.php" method="post">
Enter Numeric Value: <input type="number" name="num">
<input type="Submit" value="Calculate">
</form>

edited May 22, 2014 at 13:32

Oliver Bayes-Shelton

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answered May 22, 2014 at 13:27

Fluffeh

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9 Comments

Karan Over a year ago

@Fluffeh: I know the things you suggested, but i was curious to know, is it possible same thing we can do with HTML only. thanks for the answer

Catalin Deaconescu Over a year ago

@user3665127 you can also use javascript and ajax to do this

Fluffeh Over a year ago

@user3665127 In HTML, No. You can however embed JS/Ajax and do it if you cannot use PHP, but the PHP solution is the easiest by far.

Funk Forty Niner Over a year ago

@Fluffeh Unless you instruct Apache to treat .html files as PHP, as per my comment under OP's question.

Karan Over a year ago

@Catalin Deaconescu: Hi i got it using simple Ajax and JS file. I just pass the php result to ajax file, that's included in html file. thanks for valuable suggestion.

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bloodyKnuckles · Accepted Answer · 2014-05-22 15:53:54Z

1

Another option, first load the HTML file, then pull it into the PHP file:

home.html:

<form action="action.php" method="post">
Enter Numeric Value: <input type="number" name="num" value="<?=$a?>">
<input type="Submit" value="Calculate">
</form>

Notice the "value" field and the php code inserted there.

action.php:

<?php
    $a=$_POST["num"];
    echo "Contact our sales person for higher volume of Emails";

    require 'home.html';
?>

Simply require'ing the home.html file.

First you load home.html in your browser, enter a number, submit the form to action.php. Then when action.php loads, it displays the appropriate message, pulls in the home.html page, and loads the variable $a into the form field. When loaded as a plain HTML file, the PHP code is ignored by the browser, but parsed when the action.php file require's the HTML file.

edited May 22, 2014 at 15:53

answered May 22, 2014 at 13:43

bloodyKnuckles

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7 Comments

Funk Forty Niner Over a year ago

Are you sure about this? Do re-think this and read some of the comments under OP's question and the other answer.

Funk Forty Niner Over a year ago

That -1, it's mine. Re-read my comment above. Especially this comment

bloodyKnuckles Over a year ago

@Fred -ii- Cool, comments reread. What particularly do you think is a problem with this option? I've used this technique now and then, and just tested it to be doubly sure. PHP requires HTML files just fine and even parses the php code.

Funk Forty Niner Over a year ago

You want the OP to use value="<?=$a?>"> using .html as the extension? You say it worked for you... why? I know the why, I just want you to tell me.

bloodyKnuckles Over a year ago

From the manual: "When a file is included, parsing drops out of PHP mode and into HTML mode at the beginning of the target file, and resumes again at the end. For this reason, any code inside the target file which should be executed as PHP code must be enclosed within valid PHP start and end tags." php.net/manual/en/function.include.php

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