Cannot pass values from HTML to php

Question

I'm trying top pass a value to php and run a function. But I can not get it to work?

 <form action="" method="post">
    Name: 
    <input type="text" name="val1" id="val1"></input>
    <input type="submit" value="Submit"></input>
</form>

<?php
if( isset($_POST['submit']) ){
    $folder = htmlentities($_POST['val1']); 
}
if( isset($folder) ) {
//do something with $folder
}
?>

@AwladLiton there will be no error - just isset($_POST['submit']) always returns False — ElmoVanKielmo
– ElmoVanKielmo, Commented May 8, 2014 at 19:55
yah that is true but OP should clearify in the question that there is no error :) — Awlad Liton
– Awlad Liton, Commented May 8, 2014 at 19:56
@AwladLiton: I'm getting no error. nothing is happening. The input text goes blank after I hit the submit button. — user3617999
– user3617999, Commented May 8, 2014 at 20:07

ElmoVanKielmo · Accepted Answer · 2014-05-08 19:54:38Z

4

You need to add name to your submit if you wan't to check for it's existence in $_POST:

<input type="submit" value="Submit" name="submit"></input>

answered May 8, 2014 at 19:54

ElmoVanKielmo

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2 Comments

Jay Over a year ago

+1 Worth noting that not all browser versions will post a submit button value; so it's sometimes best to post a hidden value and check for that. Best to actually use a token generated by the server and store in user session then verify that the token matches the contents of the session to protect against CSRF.

user3617999 Over a year ago

@ElmoVanKielmo: thanks. that did not work. I'm getting no response when I run the code.

Ozmah · Accepted Answer · 2014-05-08 20:03:26Z

1

The problem is this:

if( isset( $_POST['submit'] ) ){

Due to the fact that your submit element does not have a name (as pointed out by @ElmoVanKielmo )

The original way I proposed is to try validating your val1 field:

if( isset( $_POST['val1'] ) ){

Or you can add the name attribute to your submit.

edited May 8, 2014 at 20:03

answered May 8, 2014 at 19:55

Ozmah

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3 Comments

ElmoVanKielmo Over a year ago

This is walking around the problem and not solving it.

Ozmah Over a year ago

Why would I get a downvote? The fact that I didn't mention the submit not having a name doesn't make my answer wrong.

Ozmah Over a year ago

Added to the answer so it shows what the real error is as mentioned by @ElmoVanKielmo

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