Which constant must be passed as the second argument to htmlentities() to convert single quotes (') to HTML entities?
What is the output of the following code?
class Foo Implements ArrayAccess {
function offsetExists($k) { return true;}
function offsetGet($k) {return 'a';}
function offsetSet($k, $v) {}
function offsetUnset($k) {}
}
$x = new Foo();
echo array_key_exists('foo', $x)?'true':'false';
How can you determine whether a PHP script has already sent cookies to the client?
How should class MyObject be defined for the following code to work properly? Assume $array is an array and MyObject is a user-defined class.
$obj = new MyObject();
array_walk($array, $obj);
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