Files
WordPress/wp-includes
Sergey Biryukov 7670b7dca8 Widgets: Make sure WP_Widget constructor creates a correct id_base value for a namespaced widget class.
The `id_base` value is used for the widget's `id` and `class` attributes and also for the option name which stores the widget settings (unless the widget specifies a custom `option_name` value).

With this change, any backslashes in the `id_base` for a namespaced widget class are converted to hyphens, making it easier to style the output or target the widget with JavaScript.

This also avoids a `preg_match(): Compilation failed` PHP warning from `next_widget_id_number()` on the Widgets screen, previously caused by unescaped backslashes.

Props Mte90, hermpheus, rogerlos, welcher, SergeyBiryukov.
Fixes #44098.
Built from https://develop.svn.wordpress.org/trunk@50953


git-svn-id: http://core.svn.wordpress.org/trunk@50562 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2021-05-23 08:51:58 +00:00
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