Function and usage of register_widget_control() in wordpress


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    The register_widget_control() function in WordPress is used for registering a control callback for widgets. This callback is primarily for customizing widget options. Here's a detailed explanation of the function and its usage:


    register_widget_control(int|string $name, callable $control_callback, int $width = '', int $height = '', mixed $params)


    • The register_widget_control() function allows the registration of a widget control callback, which is used for customizing widget options in the WordPress dashboard.
    • The $name parameter can be an array. If it is an array, the function either takes the first and third elements as the name or simply uses the first element.
    • After compiling the argument list, this function internally calls wp_register_widget_control().
    • It's important to refer to wp_register_widget_control() for more detailed information on the underlying process.


    1. $name (int|string - required):

      • This represents the Sidebar ID.
      • It can be either an integer or a string. If an array is passed, the function handles it as mentioned in the description.
    2. $control_callback (callable - required):

      • This is a callback function for displaying and processing the widget control form.
      • The callback function is where you define the control's interface and handle user inputs.
    3. $width (int - optional):

      • Specifies the width of the widget control.
      • Default value is an empty string, meaning it will use the default width set by WordPress.
    4. $height (int - optional):

      • Specifies the height of the widget control.
      • Default value is an empty string, similar to $width, meaning it defaults to WordPress's standard height.
    5. $params (mixed - required):

      • These are additional parameters passed to the widget.
      • This can be an array or any other data type, depending on what the widget requires.

    Sample Usage:

    function my_widget_control_callback($params) {
        // Your code to display and process the widget form goes here
        'my_widget_sidebar_id',        // Sidebar ID
        'my_widget_control_callback',  // Callback function
        300,                           // Width (optional)
        200,                           // Height (optional)
        array('param1', 'param2')      // Additional parameters

    In this sample, my_widget_control_callback is a function that you would define to handle the widget's control interface and any form submission logic. The widget is identified by 'my_widget_sidebar_id', and it has a specified width and height (300x200). The last parameter is an array of additional parameters that the widget might need.

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