Bug in do_action

[Track77]

<?php
$user_id = 1928;

class test_object {

        public $ID;

        public $plugin_id;

        public function __construct ( $_id, $_plugin_id ) {
                $this->ID = $_id;
                $this->plugin_id = $_plugin_id;
        }
}

$_object = new test_object( 53, 1 );

$_products = array( 0 => $_object );

$order = wc_get_order( 8619 );
echo  print_r( $_products, true );

add_action( '_add_items_to_order', 'fn_add_items_to_order' , 10, 3);

function fn_add_items_to_order( $_products, $order, $user_id ) {
         echo print_r( $_products, true );
}
echo  '<br>do_action' . '<br>' ;
do_action( '_add_items_to_order', $_products, $order, $user_id );

echo  '<br> <br>apply_filters<br>'  ;
apply_filters( '_add_items_to_order', $_products, $order, $user_id );

Result:

<?php

Array
(
    [0] => test_object Object
        (
            [ID] => 53
            [plugin_id] => 1
        )

)

do_action:
test_object Object
(
    [ID] => 53
    [plugin_id] => 1
)

 
apply_filters:
Array
(
    [0] => test_object Object
        (
            [ID] => 53
            [plugin_id] => 1
        )
)

PS.
do_action works correct if array contains more than 1 item.

Regards, Oleksandr Kramer

[swissspidy]

Duplicate of #40284.