使用外部变量

use 构造用于将变量导入匿名函数的范围:

$divisor = 2332;
$myfunction = function($number) use ($divisor) {
    return $number / $divisor;
};

echo $myfunction(81620); //Outputs 35

变量也可以通过引用导入:

$collection = [];

$additem = function($item) use (&$collection) {
    $collection[] = $item;
};

$additem(1);
$additem(2);

//$collection is now [1,2]