php $_POST array empty upon form submission

Question

I have a custom CMS i\'ve built that works perfectly on my dev box (Ubuntu/PHP5+/MySQL5+).

I just moved it up to the production box for my client and now all form su

Answer 1

Not the most convenient solution perhaps, but I figured it out that if I set the form action attribute to the root domain, index.php can be accessed and gets the posted variables. However if I set a rewritten URL as action, it does not work.

Answer 2

In my case it was because I was using jQuery to disable all inputs on the page just before using jQuery to submit the form. So I changed my "disable every input even the 'hidden' types":

$(":input").attr("disabled","disabled"); 

to "disable only the 'button' type inputs":

$('input[type=button]').attr('disabled',true);

This was so the user couldn't accidentally hit the 'go' button twice and hose up our DB! It seems that if you put the 'disabled' attribute on a 'hidden' type form input their values won't be sent over if the form is submitted!

Answer 3

I know this is old, but wanted to share my solution.

In my case the issue was in my .htaccess as I added variables to raise my PHP's max upload limit. My code was like this:

php_value post_max_size 50MB
php_value upload_max_filesize 50MB

Later I notice that the values should like xxM not xxMB and when I changed it to:

php_value post_max_size 50M
php_value upload_max_filesize 50M

now my $_POST returned the data as normal before. Hope this helps someone in the future.

Answer 4

For me, .htaccess was redirecting when mod_rewrite wasn't installed. Install mod_rewite and all is fine.

Specifically:

<IfModule !mod_rewrite.c>
  ErrorDocument 404 /index.php
</Ifmodule>

was executing.

Answer 5

In my case (php page on OVH mutualisé server) enctype="text/plain" does not work ($_POST and corresponding $_REQUEST is empty), the other examples below work. `

<form action="?" method="post">
<!-- in this case, my google chrome 45.0.2454.101 uses -->
<!--     Content-Type:application/x-www-form-urlencoded -->
    <input name="say" value="Hi">
    <button>Send my greetings</button>
</form>

<form action="?" method="post" enctype="application/x-www-form-urlencoded">
    <input name="say" value="Hi">
    <button>Send my application/x-www-form-urlencoded greetings</button>
</form>

<form action="?" method="post"  enctype="multipart/form-data">
    <input name="say" value="Hi">
    <button>Send my multipart/form-data greetings</button>
</form>

<form action="?" method="post" enctype="text/plain"><!-- not working -->
    <input name="say" value="Hi">
    <button>Send my text/plain greetings</button>
</form>

`

More here: method="post" enctype="text/plain" are not compatible?

Answer 6

If you are posting to a index.php file in a directory for example /api/index.php make sure in your form you specify the full directory to the file e.g

This

<form method="post" action="/api/index.php"> 
</form>

OR

<form method="post" action="/api/"> 
</form>

works.

But this fails

<form method="post" action="/api"> 
</form>