Addressing POST Request Malfunction in PHP

In the presented code snippet:

<pre><?php echo $_POST['ss'];?>
<form action="<?php echo $_SERVER['PHP_SELF'];?>" method="post">
<input name="ss" type="text" />
<input type="submit" name="submit">
</form>
</pre>

The intention is to capture the input from the text box and display it when the submit button is clicked. However, the output remains blank. While the method="get" works seamlessly, method="post" poses a problem.

Troubleshooting the POST Request

To resolve this issue, consider the following steps:

1. Check the Action Attribute:
   If you are refreshing the page, set the action attribute to an empty string, e.g.:

   action=''

   instead of:

   action="<?php echo $_SERVER['PHP_SELF'];?>"

2. Inspect the $_POST Array:
   Use var_dump to check the contents of the $_POST array after form submission.

3. Configure POST Data Handling:
   Add the following line at the beginning of your PHP file to handle POST data properly:

   if(empty($_SERVER['CONTENT_TYPE']))
   { 
     $_SERVER['CONTENT_TYPE'] = "application/x-www-form-urlencoded"; 
   }

4. Review php.ini Settings:
   Ensure that the following settings exist in your php.ini file:

   post_max_size = 8M
   variables_order = "EGPCS"

5. Consider Memory Allocation:
   Stay vigilant with memory allocation. Allocating over 2048MB may lead to issues, depending on system specifications.

6. Restart Apache (if necessary):
   If you modify php.ini and PHP runs as an Apache module, restart Apache using a command like:

   sudo /etc/init.d/httpd restart