Description:
------------
From the manual http://php.net/manual/en/language.operators.assignment.php: there are "combined operators" for all of the binary arithmetic, array union and string operators that allow you to use a value in an expression and then set its value to the result of that expression.

Wouldn't it be better to allow combined operations for all binary operators? It seems arbitrary that some binary operators (such as the logical ones) don't  support this. There seem to be plenty of use cases.

Test script:
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// In a system where a user obtains a permission if he has at least one role that gives such a permission.

$permitted = false;

foreach ($user_roles as $user_role) {
	$permitted ||= $user_role["permitted"];
}

// In a system where multiple validations exists which each return a boolean.
$valid = true;

foreach ($validations as $validation) {
	$valid &&= $validation();
}