Re: How to validate $_POST array

On Thu, 11 Aug 2022 11:47:02 +0200, Jakub wrote:

> I have this code
> 
> if ( isset($_POST) ) {
> 
> }
> 
> how to do filter_has_var function to check if $_POST exist and have value?

If the originating web page has issues a POST, then 
  $_SERVER['REQUEST_METHOD'] will equal 'POST'

Your php code can only extract from the POST values that were set by
the web page when it issued the POST. It can't demand a specific value,
but it can establish whether or not the page supplied a specific value.

Say, for instance, you expect that the page will supply a text string
in a variable called 'TextString', you can check to see if
$_POST['TextString'] is set, and validate it's contents.

So, your php logic might look like

  if ($_SERVER['REQUEST_METHOD'] == "POST")
  {
    if (isset($_POST['TextString']))
    {
      /* validate the contents of $_POST['TextString'] */
    }
    else
    {
      /* page didn't supply 'TextString'. Handle this situation */
    }
  }
  else
  {
    /* page didn't POST. Handle the situation. */
  }

HTH
-- 
Lew Pitcher
"In Skills, We Trust"