Online PHP editor | output for ZU0P3

@ 2022-07-13T09:56:06Z

<?php

class SerializableDomDocument extends DOMDocument
{
    public function __serialize(): array
    {
        return ['xmlData' => $this->saveXML()];
    }

    public function __unserialize(array $data): void
    {
        $this->loadXML($data['xmlData']);
    }
}


$dom = new SerializableDomDocument('1.0', 'UTF-8');
$dom->loadXML('<tag>value</tag>');

$serialized = serialize($dom);
$unserialized = unserialize($serialized);

echo "Serialized:\t$serialized\n-----------\nRestored:\t{$unserialized->saveXml()}";

Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.25 - 8.1.34, 8.2.12 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3: Serialized: O:23:"SerializableDomDocument":1:{s:7:"xmlData";s:39:"<?xml version="1.0"?> <tag>value</tag> ";} ----------- Restored: <?xml version="1.0"?> <tag>value</tag>
Output for 8.1.0 - 8.1.24, 8.2.0 - 8.2.11: Fatal error: Uncaught Exception: Serialization of 'SerializableDomDocument' is not allowed in /in/ZU0P3:20 Stack trace: #0 /in/ZU0P3(20): serialize(Object(SerializableDomDocument)) #1 {main} thrown in /in/ZU0P3 on line 20
Process exited with code 255.

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