PHP函数传值与传引用

class Person{
    public function __construct($name){
        $this->name = $name;
    }
}
$aman = new Person('man');
function change( $p){
    $p->name = 'lucy';
}
change($aman);
echo $aman->name; //lucy

$stu = array(
    'name' => 'lilei',
    'sex' => 'male'
);
function foo($arr){
    $arr['name'] = 'hanmeimei';
    return $arr;
}

foo($stu);
print_r($a); 

lilei

$people = array(
    
    'a' => new Person("aaaaa"),
    'b' => new Person("bbbbb"),
    );
function changeOne($arr){
    $arr['a']->name = 'lucy2';
}
changeOne($people);
var_dump($people);

array(2) {
  ["a"]=>
  object(Person)#2 (1) {
    ["name"]=>
    string(5) "lucy2"
  }
  ["b"]=>
  object(Person)#3 (1) {
    ["name"]=>
    string(5) "bbbbb"
  }
}