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Code Modernization: Fix PHP 8 "ArgumentCountError: array_merge() does not accept unknown named parameters" fatal error in `retrieve_widgets()`. 

As per the documentation of `call_user_func_array()`, the `$param_arr` should be a (numerically) indexed array, not a string-keyed array.

As we can use the spread operator in PHP 5.6+, there isn't really any need to use `call_user_func_array()` anyhow, we can call the `array_merge()` function directly.

The caveat to this is that the spread operator only works on numerically indexed arrays, so we need to wrap the `$sidebars_widgets` variable in a call to `array_values()` when using the spread operator.

Using `array_values()` in the existing `call_user_func_array()` call would also have solved this, but the solution now proposed, has the added benefit of getting rid of the overhead of `call_user_func_array()`.

Props jrf.
See #50913.

git-svn-id: https://develop.svn.wordpress.org/trunk@48839 602fd350-edb4-49c9-b593-d223f7449a82
This commit is contained in:
Sergey Biryukov 2020-08-21 21:49:02 +00:00
parent 29bfc56ca2
commit 3b1d1bfa7a
1 changed files with 1 additions and 1 deletions
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src/wp-includes/widgets.php
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@ -1262,7 +1262,7 @@ function retrieve_widgets( $theme_changed = false ) {
$sidebars_widgets = wp_map_sidebars_widgets( $sidebars_widgets );
// Find hidden/lost multi-widget instances.
$shown_widgets = call_user_func_array( 'array_merge', $sidebars_widgets );
$shown_widgets = array_merge( ...array_values( $sidebars_widgets ) );
$lost_widgets = array_diff( $registered_widgets_ids, $shown_widgets );
foreach ( $lost_widgets as $key => $widget_id ) {