On Request
Imagine you're a rat in a scientific lab. There are two doors leading into your cage, one red, one blue. Every morning, the red door opens, and a bit of cheese tumbles in. Sometimes you can eat the cheese, and all is well. Other times, there's a long silver thing stuck in it. You find that if you eat the cheese where it lies on the metal cage floor, it makes your tongue hurt, your paw jump, and gives you a very bad headache.
Static Variable Variables
<?php
class A {
static function b() {
echo "It works\n";
}
}
$theClass = "A";
$x = new $theClass;
/* Are any of the following legal? Which? */
A::b();
$x->b();
$theClass::b();
?>
Form Names
Given the following page:
<form> <input type="radio" name="BT.123" value="active" /> <input type="radio" name="BT.123" value="inactive" /> <input type="submit" value="Submit" /> </form> <?php echo "GET: ", $_GET['BT.123']; echo "POST: ", $_POST['BT.123']; echo "REQUEST: ", $_REQUEST['BT.123']; ?>
Assume the "inactive" button is checked and the form is submitted. What is the output?
Show Answer ▼
Concatenate
What, if anything, is the minimum change (fewest inserted/deleted/modified characters) required to make the output The result is bar:
<?php
class A {
private $foo = "bar";
public function __toString() {
return $this->foo;
}
}
$myObject = new A();
echo "The result is " . $myObject;
?>