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$Closure = function ($param) {
    // º¯ÊýÌå
};

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$Closure = function ($param) {
    echo "Hello, ".$param."!";
};

$Closure("World"); // Êä³ö£ºHello, World!

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function array_map_c(Closure $func, array $arr) {
    $new_arr = array();
    foreach($arr as $key => $value) {
        $new_arr[$key] = $func($value);
    }
    return $new_arr;
}

$arr = array(1, 2, 3);
$new_arr = array_map_c(function($v) {
    return $v * 2;
}, $arr);

print_r($new_arr); // Êä³ö£ºArray ( [0] => 2 [1] => 4 [2] => 6 )

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class Person {
    private $name;
    public function __construct($name) {
        $this->name = $name;
    }
    public function sayHello() {
        $Closure = function () {
            echo "Hello, ".$this->name."!";
        };
        $Closure();
    }
}

$John = new Person("John");
$John->sayHello(); // Êä³ö£ºHello, John!

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