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所以这是我第一次尝试创建一个具有创建简单图像翻转效果功能的小部件（如果有人在完成后想要它，请给我留言）。

现在我下载了一个示例小部件并进行了一些更改，但我仍然没有触及输出的 html 部分，所以忽略那一点。现在我的问题是，当我单击保存时，字段中的值会恢复为默认值，并且他们没有在示例小部件上执行此操作。这是我的代码：

<?php
/**
 * Plugin Image: Rollover Widget
 * Description: A widget that creates a rollover image effect with a hyperlink.
 * Version: 0.1
 * Author: Zak Elas
 * Author URI:
 */


add_action( 'widgets_init', 'my_widget' );


function my_widget() {
    register_widget( 'MY_Widget' );
}

class MY_Widget extends WP_Widget {

    function MY_Widget() {
        $widget_ops = array( 'classname' => 'example', 'description' => __('A widget that creates a rollover image effect with a hyperlink. ', 'example') );

        $control_ops = array( 'width' => 300, 'height' => 350, 'id_base' => 'Rollover Widget' );

        $this->WP_Widget( 'example-widget', __('Example Widget', 'example'), $widget_ops, $control_ops );
    }

    function widget( $args, $instance ) {
        extract( $args );

        //Our variables from the widget settings.
        $link = apply_filters('widget_link', $instance['link'] );
        $image = $instance['image'];
        $rollover_image = $instance['rollover_image'];

        echo $before_widget;

        // Display the widget link 
        if ( $link )
            echo $before_link . $link . $after_link;

        //Display the name 

            printf( '<p>' . __('Hey their Sailor! My name is %1$s.', 'example') . '</p>', $image );


            printf( '<p>' . __('Hey their Sailor! My name is %1$s.', 'example') . '</p>', $rollover_image );



        echo $after_widget;
    }

    //Update the widget 

    function update( $new_instance, $old_instance ) {
        $instance = $old_instance;

        //Strip tags from link and name to remove HTML 
        $instance['link'] = strip_tags( $new_instance['link'] );
        $instance['image'] = strip_tags( $new_instance['image'] );
        $instance['rollover_image'] = strip_tags( $new_instance['rollover_image'] );

        return $instance;
    }


    function form( $instance ) {

        //Set up some default widget settings.
        $defaults = array( 'link' => __('Example', 'example'), 'image' => __('/images/editorial.png', 'example') , 'rollover_image' => __('/images/editorial.png', 'example') );
        $instance = wp_parse_args( (array) $instance, $defaults ); ?>


        <p>
            <label for="<?php echo $this->get_field_id( 'link' ); ?>"><?php _e('link', 'example'); ?></label>
            <input id="<?php echo $this->get_field_id( 'link' ); ?>" name="<?php echo $this->get_field_name( 'link' ); ?>" value="<?php echo $instance['link']; ?>" style="width:100%;" />
        </p>


        <p>
            <label for="<?php echo $this->get_field_id( 'image' ); ?>"><?php _e('image', 'example'); ?></label>
            <input id="<?php echo $this->get_field_id( 'image' ); ?>" name="<?php echo $this->get_field_name( 'image' ); ?>" value="<?php echo $instance['image']; ?>" style="width:100%;" />
        </p>

        <p>
            <label for="<?php echo $this->get_field_id( 'rollover_image' ); ?>"><?php _e('rollover_image:', 'example'); ?></label>
            <input id="<?php echo $this->get_field_id( 'rollover_image' ); ?>" name="<?php echo $this->get_field_name( 'image' ); ?>" value="<?php echo $instance['rollover_image']; ?>" style="width:100%;" />
        </p>



    <?php
    }
}

?>

这是示例小部件代码

<?php
/**
 * Plugin Name: A simple Widget
 * Description: A widget that displays authors name.
 * Version: 0.1
 * Author: Bilal Shaheen
 * Author URI: http://gearaffiti.com/about
 */


add_action( 'widgets_init', 'my_widget' );


function my_widget() {
    register_widget( 'MY_Widget' );
}

class MY_Widget extends WP_Widget {

    function MY_Widget() {
        $widget_ops = array( 'classname' => 'example', 'description' => __('A widget that displays the authors name ', 'example') );

        $control_ops = array( 'width' => 300, 'height' => 350, 'id_base' => 'example-widget' );

        $this->WP_Widget( 'example-widget', __('Example Widget', 'example'), $widget_ops, $control_ops );
    }

    function widget( $args, $instance ) {
        extract( $args );

        //Our variables from the widget settings.
        $title = apply_filters('widget_title', $instance['title'] );
        $name = $instance['name'];
        $show_info = isset( $instance['show_info'] ) ? $instance['show_info'] : false;

        echo $before_widget;

        // Display the widget title 
        if ( $title )
            echo $before_title . $title . $after_title;

        //Display the name 
        if ( $name )
            printf( '<p>' . __('Hey their Sailor! My name is %1$s.', 'example') . '</p>', $name );


        if ( $show_info )
            printf( $name );


        echo $after_widget;
    }

    //Update the widget 

    function update( $new_instance, $old_instance ) {
        $instance = $old_instance;

        //Strip tags from title and name to remove HTML 
        $instance['title'] = strip_tags( $new_instance['title'] );
        $instance['name'] = strip_tags( $new_instance['name'] );
        $instance['show_info'] = $new_instance['show_info'];

        return $instance;
    }


    function form( $instance ) {

        //Set up some default widget settings.
        $defaults = array( 'title' => __('Example', 'example'), 'name' => __('Bilal Shaheen', 'example'), 'show_info' => true );
        $instance = wp_parse_args( (array) $instance, $defaults ); ?>

        //Widget Title: Text Input.
        <p>
            <label for="<?php echo $this->get_field_id( 'title' ); ?>"><?php _e('Title:', 'example'); ?></label>
            <input id="<?php echo $this->get_field_id( 'title' ); ?>" name="<?php echo $this->get_field_name( 'title' ); ?>" value="<?php echo $instance['title']; ?>" style="width:100%;" />
        </p>

        //Text Input.
        <p>
            <label for="<?php echo $this->get_field_id( 'name' ); ?>"><?php _e('Your Name:', 'example'); ?></label>
            <input id="<?php echo $this->get_field_id( 'name' ); ?>" name="<?php echo $this->get_field_name( 'name' ); ?>" value="<?php echo $instance['name']; ?>" style="width:100%;" />
        </p>


        //Checkbox.
        <p>
            <input class="checkbox" type="checkbox" <?php checked( $instance['show_info'], true ); ?> id="<?php echo $this->get_field_id( 'show_info' ); ?>" name="<?php echo $this->get_field_name( 'show_info' ); ?>" /> 
            <label for="<?php echo $this->get_field_id( 'show_info' ); ?>"><?php _e('Display info publicly?', 'example'); ?></label>
        </p>

    <?php
    }
}

?>
4

2 回答 2

0

id_base应该匹配 的第一个参数，WP_Widget并且应该是小写的，没有空格：

$control_ops = array( 
    'width' => 300, 
    'height' => 350, 
    'id_base' => 'rollover_image_id' 
);

$this->WP_Widget( 
    'rollover_image_id', 
    __('Example Widget', 'example'), 
    $widget_ops, 
    $control_ops 
);

你有一个get_field_name( 'image' )
它应该在的地方get_field_name( 'rollover_image' )。

于 2013-09-06T13:49:35.333 回答
0

更改此行

$this->WP_Widget( 'example-widget', __('Example Widget', 'example'), $widget_ops, $control_ops );

对此

$this->WP_Widget( 'my_widget', __('Example Widget', 'example'), $widget_ops, $control_ops );

consructor id（它是example-widget，我已经修改为my_widget）必须是类名（即 MY_Widget ）的命名空间形式（小写，无空格）。

这将工作 insaAllah。

于 2014-01-05T00:23:45.390 回答