Question

I had a problem with a piece of code i just developed and I have narrowed it down to the number 0 not being accepted.

This is the html

<input type="text" size="1" name="hs" maxlength='3'>

If I enter ZERO into that input box it gives an error saying nothing has been entered.

Once I have passed this through, this is the PHP error handling code

$field = "hs"; 
    if((!$hs) || strlen($hs = trim($hs)) == 0)
    {
        $form->setError($field, "* Home score not entered");

    }

    $field = "as"; 
    if((!$as) || strlen($as = trim($as)) == 0)
    {
        $form->setError($field, "* Away score not entered");

    }

I am getting those errors if I enter the score at a 0.
Any ideas why this is happening?
Is it something any of you have experienced?

THanks

Answer 1

PHP interprets both the text string '0‘ and the number 0 as false. Implicit type conversion is sometimes handy and sometimes annoying. (What you’re getting from the form is the string '0').

Try something like

if (strlen($hs = trim($hs)) == 0) {
    $form->setError($field, "* Home score not entered");
} elseif (!is_numeric($hs)) {
    $form->setError($field, "* Score must be a number");
}