how to test for empty $_POST vars

[toptomato]

Hi,
Im trying to test for empty post values. So far i'm just using this

if($urlAdd == '') {return true} 

i'm thinking this isn't enough. can someone recommend additional ways to test,

at first i had this but it doesn't work. it always says it's set.

if(isset($_POST['submit'])) {
    $urlAdd = $_POST['url'];
    if((isset($urlAdd)) || ($urlAdd !='')) {
        echo "URL is set";
        //Validate URL
    } else {
        //echo "URL is not set";
        $error = "URL is not set";
    }
} else {
    echo "submit is not set";
    } 

thanks for the help

[NogDog]

I like to apply trim() to all $_POST values via array_walk_recursive(), then check for unset/empty fields via a combination of isset() and using the "is identical" operator to check for empty strings.

array_walk_recursive(
  $_POST,
  create_function(
    '&$value, $key',
    '$value = trim($value);'
  )
);
if( ! isset($_POST['foo']) or $_POST['foo'] === '') {
  // handle error for missing 'foo'
} 

[toptomato]

awesome, thank you!

not familiar with that, will try it out, thanks