Regular expression to enforce an empty field

I don't see why you'd want to use regex for this. Just check if it evaluates to boolean false ("if (!$field)...")

 

^ I'm guessing this has something to do with vB's options? Anyway, using regular expression, you could do this:

'~^$~'

PHP:

 

Yeah, you can use the above regex, although why you can't just test the length of the field with strlen() I'm not too sure

 

I've seen you using strlen() a lot in your blog, and I think it's kinda redundant too. You can just do:

if (!$field)
{
    // ...
}

PHP:

... which returns false on empty strings too, and it's a function call less.

Or even:

if (!$field = trim($field))
{
    // ...
}

PHP:

... to make sure the field doesn't contain just empty spaces.

EDIT:

And least, you could do:

if (!empty($field))
{
    // ...
}

PHP:

... which does the same as isset() and (bool)$field at the same time. It's faster too, since it's a language construct.

 

Yeah I guess. Thanks

 

Ah I see

 

I guess vB adds the delimiters automatically then.