php中闭包函数的用法实例

$closure = function($param) { echo $param; };

function test(){
$test='';
$test=function ($str){
echo 'test';
return $str;
};
timeout('Y-m-d H:i:s',function ($time){
//$this->date=time();
return $time-24*60*60;
});

var_dump($test(‘hello word!’));

}
function timeout($format,$time){
echo date($format,$time(time()));
}
test();
?>

class A {
private static $sfoo = 1;
private $ifoo = 2;
}
$cl1 = static function() {
return A::$sfoo;
};
$cl2 = function() {
return $this->ifoo;
};

$bcl1 = Closure::bind($cl1, null, ‘A’);
$bcl2 = Closure::bind($cl2, new A(), ‘A’);
echo $bcl1(), “n”;
echo $bcl2(), “n”;
?>

class A1 {
function __construct($val) {
$this->val = $val;
}
function getClosure() {
//returns closure bound to this object and scope
return function() { return $this->val; };
}
}

$ob1 = new A1(1);
$ob2 = new A1(2);

$cl = $ob1->getClosure();
echo $cl(), “n”;
$cl = $cl->bindTo($ob2);
echo $cl(), “n”;
?>

$fn = function(){
return ++$this->foo; // increase the value
};

class Bar{
private $foo = 1; // initial value
}

$bar = new Bar();

$fn1 = $fn->bindTo($bar, ‘Bar’); // specify class name
$fn2 = $fn->bindTo($bar, $bar); // or object
$fn3 = $fn2->bindTo($bar); // or object

echo $fn1(); // 2
echo $fn2(); // 3
echo $fn3(); // 4

?>