True and false OR 1 and 0?

[Eiolon]

Just a silly question.  I've been using 1 and 0 to tell if something is true or false, such as if a feature is enabled or not.  I see that some use the words true and false.  Is there a proper way or is either way correct?  Thanks!

[AyKay47]

really depends on what it is that you are trying to receive a true false response on.. if it is a boolean function.. then it will return TRUE or FALSE upon execution.. if it is a custom function, or something along those lines.. a 0 or 1 is viable..

[Pikachu2000]

An integer 0 (zero) or a boolean FALSE will evaluate to FALSE using both strict === and loose == comparisons. An integer 1 (one) will only evaluate to TRUE with a loose == comparison. Run the code below . . .

 

$vars = array('zero' => 0, 'one' => 1, 'true' => TRUE, 'false' => FALSE);
foreach( $vars as $k => $v ) {
echo "<br>Key: $k <=> var_dump: ";
var_dump($v);
echo '<br>';
echo "Loose == comparison to TRUE: ";
echo $v == TRUE ? 'Yes<br>' : 'No<br>';
echo "Strict === comparison to TRUE: ";
echo $v === TRUE ? 'Yes<br>' : 'No<br>';
echo "Loose == comparison to FALSE: ";
echo $v == FALSE ? 'Yes<br>' : 'No<br>';
echo "Strict === comparison to FALSE: ";
echo $v == FALSE ? 'Yes<br>' : 'No<br>';
echo '<hr>';
}

[xyph]

(int) 0 !== FALSE