一文带你吃透什么是PHP中的序列化

class User
{
    public $name;
    public $email;
​
    public function __construct($name, $email)
    {
        $this->name = $name;
        $this->email = $email;
    }
}
​
$user = new User('John', 'john@example.com');
​
$serializedUser = serialize($user);
​
echo $serializedUser;

$unserializedUser = unserialize($serializedUser);
​
echo $unserializedUser->name; // John
echo $unserializedUser->email; // john@example.com

class MyClass 
{
    private $data;
    private $secret;
​
    public function __sleep() {
        return ['data'];
    }
}

class MyClass 
{
    private $data;
    private $secret;
​
    public function __wakeup() {
        $this->secret = '123456';
    }
}

$data = [
    "name" => "John", 
    "age" => 30
];
​
// Serialize the data
$serializedData = serialize($data);
​
// Send the serialized data to the external service using HTTP POST
$ch = curl_init("http://example.com/service");
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, "data=" . $serializedData);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$response = curl_exec($ch);
curl_close($ch);
​
// Handle the response from the service
echo $response;

// Get the serialized data from the HTTP POST request
$serializedData = $_POST['data'];
​
// Unserialize the data
$data = unserialize($serializedData);
​
// Use the data
echo "Name: " . $data['name'] . "\n";
echo "Age: " . $data['age'] . "\n";

use Illuminate\Bus\Queueable;
use Illuminate\Contracts\Queue\ShouldQueue;
use Illuminate\Foundation\Bus\Dispatchable;
use Illuminate\Queue\InteractsWithQueue;
​
class ExampleJob implements ShouldQueue
{
    use Dispatchable;
    use InteractsWithQueue;
    use Queueable;
    use SerializesModels;
​
    /**
     * Create a new job instance.
     *
     * @return void
     */
    public function __construct()
    {
        //
    }
​
    /**
     * Execute the job.
     *
     * @return void
     */
    public function handle()
    {
        //
    }
}

namespace Illuminate\Queue;
​
trait SerializesModels
{
    use SerializesAndRestoresModelIdentifiers;
​
    /**
     * Prepare the instance for serialization.
     *
     * @return array
     */
    public function __sleep()
    {
        // ...
    }
​
    /**
     * Restore the model after serialization.
     *
     * @return void
     */
    public function __wakeup()
    {
        // ...
    }
​
    /**
     * Prepare the instance values for serialization.
     *
     * @return array
     */
    public function __serialize()
    {
        // ...
    }
​
    /**
     * Restore the model after serialization.
     *
     * @param  array  $values
     * @return void
     */
    public function __unserialize(array $values)
    {
        // ...
    }
}