Question

$a = true and false; //true
$b = true && false; //false
$c = (true and false); //false
$d = (true && false); //false

Why gives case ‘a’ true?

I thought that and and && has the same precedence but they don’t.

Answer 1

As stated in the documentation, this is expected bahvior

// The constant true is assigned to $h and then false is ignored
// Acts like: (($h = true) and false)
$h = true and false;

http://php.net/manual/en/language.operators.logical.php