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@ 2023-07-01T09:16:55Z

<?php

define( 'APPLY_PATCH', false );
define( 'VERBOSE', true );

class Dummy {
    public    $pub  = 0;
    protected $prot = 1;
    private   $priv = 2;
}

$dummy            = new Dummy();
$dummy_to_arr     = (array) $dummy; // Doing this adds NUL bytes to private and protected property keys.
$dummy_arr_to_obj = (object) $dummy_to_arr; // Now there's NUL bytes in the property names.
$object_vars      = APPLY_PATCH ? wp_get_object_vars( $dummy_arr_to_obj ) : get_object_vars( $dummy_arr_to_obj );

if ( VERBOSE ) {
    echo '$dummy: ',            PHP_EOL, var_export( $dummy, true ),            PHP_EOL, PHP_EOL;
    echo '$dummy_to_arr: ',     PHP_EOL, var_export( $dummy_to_arr, true ),     PHP_EOL, PHP_EOL;
    echo '$dummy_arr_to_obj: ', PHP_EOL, var_export( $dummy_arr_to_obj, true ), PHP_EOL, PHP_EOL;
    echo '$object_vars: ',      PHP_EOL, var_export( $object_vars, true ),      PHP_EOL, PHP_EOL;
}

foreach ( $object_vars as $property_name => $property_value ) {
    $dummy_arr_to_obj->$property_name = '1';
}

// The new function in PR 3607.
function wp_get_object_vars( $obj ) {
    return array_filter(
        get_object_vars( $obj ),
        function ( $key ) {
            return ord( $key ) !== 0;
        },
        ARRAY_FILTER_USE_KEY
    );
}

Output for 8.2.0 - 8.2.26, 8.3.0 - 8.3.14, 8.4.1: $dummy: \Dummy::__set_state(array( 'pub' => 0, 'prot' => 1, 'priv' => 2, )) $dummy_to_arr: array ( 'pub' => 0, '' . "\0" . '*' . "\0" . 'prot' => 1, '' . "\0" . 'Dummy' . "\0" . 'priv' => 2, ) $dummy_arr_to_obj: (object) array( 'pub' => 0, 'prot' => 1, 'priv' => 2, ) $object_vars: array ( 'pub' => 0, '' . "\0" . '*' . "\0" . 'prot' => 1, '' . "\0" . 'Dummy' . "\0" . 'priv' => 2, ) Fatal error: Uncaught Error: Cannot access property starting with "\0" in /in/ScIk3:25 Stack trace: #0 {main} thrown in /in/ScIk3 on line 25
Process exited with code 255.
Output for 8.0.1 - 8.0.30, 8.1.0 - 8.1.31: $dummy: Dummy::__set_state(array( 'pub' => 0, 'prot' => 1, 'priv' => 2, )) $dummy_to_arr: array ( 'pub' => 0, '' . "\0" . '*' . "\0" . 'prot' => 1, '' . "\0" . 'Dummy' . "\0" . 'priv' => 2, ) $dummy_arr_to_obj: (object) array( 'pub' => 0, 'prot' => 1, 'priv' => 2, ) $object_vars: array ( 'pub' => 0, '' . "\0" . '*' . "\0" . 'prot' => 1, '' . "\0" . 'Dummy' . "\0" . 'priv' => 2, ) Fatal error: Uncaught Error: Cannot access property starting with "\0" in /in/ScIk3:25 Stack trace: #0 {main} thrown in /in/ScIk3 on line 25
Process exited with code 255.

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