PHP printed boolean value is empty, why?

Question

I am new to PHP. I am implementing a script and I am puzzled by the following:

$local_rate_filename = $_SERVER[\'DOCUMENT_ROOT\'].\"/ghjr324l.txt\";
$local_r         


        

Answer 1

The results come from the fact that php implicitly converts bool values to strings if used like in your example. (string)false gives an empty string and (string)true gives '1'. That is consistent with the fact that '' == false and '1' == true.