Question

I’m working on a function to check wheter a $_POST is set or not.

The following works fine:

if (isset($_POST['einfo'])) {
    $einfo = $_POST['einfo'];
} else {  $einfo = NULL; }

echo $einfo;

And this is the function i’m trying to make:

  function  ifset($check) {
       if (isset($_POST['$check'])) {
     $check = $_POST['$check'];
    } else {  $check = NULL; }
      return $check;
}

$einfo = ifset('einfo');

echo $einfo; 

But i get no output.

Answer 1

You have to use double quotes:

function ifset($check)
{
  if (isset($_POST["$check"]))
  {
    $check = $_POST["$check"];
  }
  else
  {
    $check = NULL;
  }
  return $check;
}

But actually you can omit them.