ctype bug?

[barand]

While trying to validate some text, I recently came across this feature of the [man]ctype_alpha[/man] function

	dl("php_ctype.dll");

if (ctype_alpha ( '' ))
{
	echo "<p>That is a letter</p>";  //gets executed!!!
}
else
{
	echo "<p>Not a letter</p>";
}
phpinfo();

I'm using PHP4.1.1. Does anyone know if this happens in later versions too?

[xblue]

not really sure if this is a bug. after all, it does exactly what the documentation says:

Returns TRUE if every character in text is a letter ...

thus it would only return false if any of the characters isn't a letter, which won't happen in an empty string. just my interpretation though...