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PHP PHP Basics (Retired) PHP Datatypes PHP Datatypes Challenge

Jared Skye
Jared Skye
3,069 Points
Posted by Jared Skye
Jared Skye
3,069 Points

For this question, why isn't this evaluating to true: $bool = 1; Doesn't a non-zero value evaluate to true?

The question asks to write a boolean that evaluates to true, which from what I am thinking the following should evaluate to true:

$bool = 1;

I remember in the course that zero or empty values evaluate to false and non-zeros or non-empties evaluate true. Am I incorrect in this? The question doesn't say it wants me to set $bool to true it says evaluate to true.

1 Answer

William Li
PLUS
William Li
Courses Plus Student 26,868 Points
William Li
William Li
Courses Plus Student 26,868 Points

For this part of challenge, you have to do sth like this

<?php
$bool = true;
// or
$bool = (3>2);
?>

Assign value that evaluate to boolean true to bool.

I remember in the course that zero or empty values evaluate to false and non-zeros or non-empties evaluate true.

that's true, but you have to convert those values to boolean; by writing $bool = 1;, your bool variable only holds an integer value, but the grader tests whether a value is actually true, not whether the value evaluates to true in boolean context.

If you want it to work, you may use the literal cast operator in PHP to convert the integer to boolean.

<?php
$bool = (bool) 1;
?>

That should work.