Widgets: Prevent fatal errors in PHP 8 when retrieve_widgets() and wp_map_sidebars_widgets() attempt to merge non-array values.
Props kesselb, lakshyajeet, hellofromTonya, janthiel, ikriv, audrasjb, mtg169, bartnv, pmbaldha, mindctrl, westonruter, jrf. Fixes #57469. Built from https://develop.svn.wordpress.org/trunk@60732 git-svn-id: http://core.svn.wordpress.org/trunk@60068 1a063a9b-81f0-0310-95a4-ce76da25c4cd
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@@ -16,7 +16,7 @@
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*
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* @global string $wp_version
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*/
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$wp_version = '6.9-alpha-60731';
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$wp_version = '6.9-alpha-60732';
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/**
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* Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.
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@@ -1350,6 +1350,13 @@ function retrieve_widgets( $theme_changed = false ) {
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$sidebars_widgets = _wp_remove_unregistered_widgets( $sidebars_widgets, $registered_widgets_ids );
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$sidebars_widgets = wp_map_sidebars_widgets( $sidebars_widgets );
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// Replace non-array values inside the array with an empty array.
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foreach ( $sidebars_widgets as $key => $value ) {
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if ( ! is_array( $value ) ) {
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$sidebars_widgets[ $key ] = array();
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}
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}
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// Find hidden/lost multi-widget instances.
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$shown_widgets = array_merge( ...array_values( $sidebars_widgets ) );
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$lost_widgets = array_diff( $registered_widgets_ids, $shown_widgets );
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@@ -1511,6 +1518,13 @@ function wp_map_sidebars_widgets( $existing_sidebars_widgets ) {
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$old_sidebars_widgets = _wp_remove_unregistered_widgets( $old_sidebars_widgets );
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// Replace non-array values inside the array with an empty array.
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foreach ( $new_sidebars_widgets as $key => $value ) {
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if ( ! is_array( $value ) ) {
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$new_sidebars_widgets[ $key ] = array();
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}
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}
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if ( ! empty( $old_sidebars_widgets ) ) {
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// Go through each remaining sidebar...
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