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

Be careful when you convert back and forth with boolean, the manual says:

A boolean TRUE value is converted to the string "1". Boolean FALSE is converted to "" (the empty string). This allows conversion back and forth between boolean and string values.

So you need to do a:

echo (int)$local_rates_file_exists."
";