探讨PHP中对象转数组和对象数组的过程

class Person {    public $name = "";    public $age = 0;    public $city = "";    function __construct($name, $age, $city) {        $this->name = $name;        $this->age = $age;        $this->city = $city;    }}$person = new Person("John", 25, "San Francisco");$array = (array) $person;print_r($array);

class Person {    public $name = "";    public $age = 0;    public $city = "";    function __construct($name, $age, $city) {        $this->name = $name;        $this->age = $age;        $this->city = $city;    }}$person = new Person("John", 25, "San Francisco");$string = serialize($person);$array = unserialize($string);print_r($array);

class Person {    public $name = "";    public $age = 0;    public $city = "";    function __construct($name, $age, $city) {        $this->name = $name;        $this->age = $age;        $this->city = $city;    }}$person1 = new Person("John", 25, "San Francisco");$person2 = new Person("Bill", 30, "Los Angeles");$person3 = new Person("Mary", 27, "New York");$people = array($person1, $person2, $person3);foreach($people as $person) {    echo $person->name . " is " . $person->age . " years old and lives in " . $person->city . "<br>";}

John is 25 years old and lives in San FranciscoBill is 30 years old and lives in Los AngelesMary is 27 years old and lives in New York