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Widgets: Add nudge for registered widgets

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Informs developers that widgets need to be registered before they can be
displayed through `the_widget()`. Previously it would fail with an ambiguous
undefined index notice.

Props SeBsZ, mrasharirfan.
Fixes #41743.


Built from https://develop.svn.wordpress.org/trunk@41327


git-svn-id: http://core.svn.wordpress.org/trunk@41158 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This commit is contained in:
Konstantin Obenland
2017-09-01 08:50:47 +00:00
parent fff02086dd
commit 564e13cf30
2 changed files with 6 additions and 1 deletions
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5
wp-includes/widgets.php
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@@ -1036,6 +1036,11 @@ function wp_convert_widget_settings($base_name, $option_name, $settings) {
function the_widget( $widget, $instance = array(), $args = array() ) {
global $wp_widget_factory;
if ( ! isset( $wp_widget_factory->widgets[ $widget ] ) ) {
_doing_it_wrong( __FUNCTION__, __( 'Widgets need to be registered before they can be displayed.' ), '4.9.0' );
return;
}
$widget_obj = $wp_widget_factory->widgets[$widget];
if ( ! ( $widget_obj instanceof WP_Widget ) ) {
return;