3v4l.org

run code in 500+ PHP versions simultaneously
<?php class ReplacementArray { private $data; public function __construct( $data ) { $this->data = $data; } } $o = new ReplacementArray( [ 1 ] ); var_export( serialize( $o ) );
Output for 8.1.34, 8.2.30 - 8.2.31, 8.3.5 - 8.3.31, 8.4.9 - 8.4.22, 8.5.0 - 8.5.7
'O:16:"ReplacementArray":1:{s:22:"' . "\0" . 'ReplacementArray' . "\0" . 'data";a:1:{i:0;i:1;}}'

preferences:
39.17 ms | 605 KiB | 4 Q