PHP - Get bool to echo false when false

Question

The following code doesn\'t print out anything:

$bool_val = (bool)false;
echo $bool_val;

But the following code prints 1:

Answer 1

function dump_condition($condition){
    if($condition){
        return "true";
    } else {
        return "false";
    }
 }

use on script

echo dump_condition(1>0); // print "true"

echo dump_condition(1<0); // print "false"

Answer 2

Your'e casting a boolean to boolean and expecting an integer to be displayed. It works for true but not false. Since you expect an integer:

echo (int)$bool_val;