Question

This is driving me crazy! I have a form and am supposed to do some validation on a text input called “range”.

    function splitRange($range){
      if($range == ''){
        $returnedValue = '';
        return $returnedValue;
      }

      // some other code here
      return false;
    }    

    // ----------------

    $myRange = splitRange($_POST['range']);

    if($myRange == false){
      echo 'error';
    }

This keeps returning false and echoing ‘error’ when “range” is left blank!

Answer 1

Your final comparison at the end states

if($myRange == false){
  echo 'error';
}

Which means “if $myRange is false-y, echo ‘error'”

In other words,

if ($myRange == "")

and

if ($myRange == false)

are equivalent.

If you want it to compare whether $myRange is a boolean false, use

if($myRange === false)