如何向WP_Widget_Text添加另一個文本框

Question

我是wordpress和小部件的新手。

我正在嘗試將另一個字段添加到默認文本小部件。 你能幫助我嗎？

我想要做的圖像： http ： //imgur.com/KoYvV

我能夠編輯default-widgets.php並添加另一個textarea但它無法正常工作。 請幫助並引導我找到正確的方向。

class WP_Widget_Text extends WP_Widget {

    function __construct() {
        $widget_ops = array('classname' => 'widget_text', 'description' => __('Arbitrary text or HTML'));
        $control_ops = array('width' => 400, 'height' => 350);
        parent::__construct('text', __('Text'), $widget_ops, $control_ops);
    }

    function widget( $args, $instance ) {
        extract($args);
        $title = apply_filters( 'widget_title', empty( $instance['title'] ) ? '' : $instance['title'], $instance, $this->id_base );
        $text = apply_filters( 'widget_text', empty( $instance['text'] ) ? '' : $instance['text'], $instance );
        $text = apply_filters( 'widget_text2', empty( $instance['text2'] ) ? '' : $instance['text2'], $instance );
        echo $before_widget;
        if ( !empty( $title ) ) { echo $before_title . $title . $after_title; } ?>
            <div class="textwidget">
                <?php echo !empty( $instance['filter'] ) ? wpautop( $text ) : $text; ?>
            </div>
            <div class="textwidget2">
                <?php echo !empty( $instance['filter'] ) ? wpautop( $text2 ) : $text2; ?>
            </div>
        <?php
        echo $after_widget;
    }

    function update( $new_instance, $old_instance ) {
        $instance = $old_instance;
        $instance['title'] = strip_tags($new_instance['title']);
        if ( current_user_can('unfiltered_html') ) {
            $instance['text'] =  $new_instance['text'];
            $instance['text2'] =  $new_instance['text2'];
        } else {
            $instance['text'] = stripslashes( wp_filter_post_kses( addslashes($new_instance['text']) ) ); // wp_filter_post_kses() expects slashed
            $instance['text2'] = stripslashes( wp_filter_post_kses( addslashes($new_instance['text2']) ) ); // wp_filter_post_kses() expects slashed
        }
        $instance['filter'] = isset($new_instance['filter']);
        return $instance;
    }

    function form( $instance ) {
        $instance = wp_parse_args( (array) $instance, array( 'title' => '', 'text' => '', 'text2' => '' ) );
        $title = strip_tags($instance['title']);
        $text = esc_textarea($instance['text']);
        $text2 = esc_textarea($instance['text2']);
?>
        <p><label for="<?php echo $this->get_field_id('title'); ?>"><?php _e('Title:'); ?></label>
        <input class="widefat" id="<?php echo $this->get_field_id('title'); ?>" name="<?php echo $this->get_field_name('title'); ?>" type="text" value="<?php echo esc_attr($title); ?>" /></p>

        <textarea class="widefat" rows="16" cols="20" id="<?php echo $this->get_field_id('text'); ?>" name="<?php echo $this->get_field_name('text'); ?>"><?php echo $text; ?></textarea>
        <textarea class="widefat" rows="8" cols="20" id="<?php echo $this->get_field_id('text2'); ?>" name="<?php echo $this->get_field_name('text2'); ?>"><?php echo $text2; ?></textarea>

        <p><input id="<?php echo $this->get_field_id('filter'); ?>" name="<?php echo $this->get_field_name('filter'); ?>" type="checkbox" <?php checked(isset($instance['filter']) ? $instance['filter'] : 0); ?> />&nbsp;<label for="<?php echo $this->get_field_id('filter'); ?>"><?php _e('Automatically add paragraphs'); ?></label></p>
<?php
    }
}

Answer 1

我不確定你是否已經想出來了，但這里是你問題的解決方案。

首先，您不希望直接編輯窗口小部件。 如果您更新Wordpress，您的代碼將被覆蓋。 Wordpress具有高度可擴展性，因此您無需直接編輯代碼。

理想情況下，您應該創建一個插件。 如果你想學習如何，請閱讀http://codex.wordpress.org/Writing_a_Plugin

Wordpress的另一個好處是它們有非常好的文檔。

但是，為簡單起見，我們將在您正在使用的主題中的functions.php中執行此操作。 您可以在/wp-content/themes/your_theme/functions.php找到它

以下是您問題中代碼示例的修改版本：

//First we need to change the name of the Widget. I just named it RT_Widget_Text, so just be aware that you can change it to anything you want and to replace all instances of that text. Just make sure to not name it WP_Widget_Text
class RT_Widget_Text extends WP_Widget {

    function __construct() {
        //I made a change here. I changed the class name to widget_double_text. This probably has no effect, but I just changed it for good measure.
        $widget_ops = array('classname' => 'widget_double_text', 'description' => __('Arbitrary text or HTML'));
        $control_ops = array('width' => 400, 'height' => 350);

        //Here is the important part. Change the "text" to "double_text" and "Text" to "Text 2" or to some other text that will identify the widget.
        parent::__construct('double_text', __('Text 2'), $widget_ops, $control_ops);
    }

    function widget( $args, $instance ) {
        extract($args);
        $title = apply_filters( 'widget_title', empty( $instance['title'] ) ? '' : $instance['title'], $instance, $this->id_base );
        $text = apply_filters( 'widget_text', empty( $instance['text'] ) ? '' : $instance['text'], $instance );
        //I changed this to $text2 = instead of $text =
        //This would have caused the first text section to display you text2 and your text2 to display nothing.
        //I wonder if this was your issue?
        $text2 = apply_filters( 'widget_text', empty( $instance['text2'] ) ? '' : $instance['text2'], $instance );
        echo $before_widget;
        if ( !empty( $title ) ) { echo $before_title . $title . $after_title; } ?>
            <div class="textwidget">
                <?php echo !empty( $instance['filter'] ) ? wpautop( $text ) : $text; ?>
            </div>
            <div class="textwidget2">
                <?php echo !empty( $instance['filter'] ) ? wpautop( $text2 ) : $text2; ?>
            </div>
        <?php
        echo $after_widget;
    }

    function update( $new_instance, $old_instance ) {
        $instance = $old_instance;
        $instance['title'] = strip_tags($new_instance['title']);
        if ( current_user_can('unfiltered_html') ) {
            $instance['text'] =  $new_instance['text'];
            $instance['text2'] =  $new_instance['text2'];
        } else {
            $instance['text'] = stripslashes( wp_filter_post_kses( addslashes($new_instance['text']) ) ); // wp_filter_post_kses() expects slashed
            $instance['text2'] = stripslashes( wp_filter_post_kses( addslashes($new_instance['text2']) ) ); // wp_filter_post_kses() expects slashed
        }
        $instance['filter'] = isset($new_instance['filter']);
        return $instance;
    }

    function form( $instance ) {
        $instance = wp_parse_args( (array) $instance, array( 'title' => '', 'text' => '', 'text2' => '' ) );
        $title = strip_tags($instance['title']);
        $text = esc_textarea($instance['text']);
        $text2 = esc_textarea($instance['text2']);
?>
        <p><label for="<?php echo $this->get_field_id('title'); ?>"><?php _e('Title:'); ?></label>
        <input class="widefat" id="<?php echo $this->get_field_id('title'); ?>" name="<?php echo $this->get_field_name('title'); ?>" type="text" value="<?php echo esc_attr($title); ?>" /></p>

        <textarea class="widefat" rows="16" cols="20" id="<?php echo $this->get_field_id('text'); ?>" name="<?php echo $this->get_field_name('text'); ?>"><?php echo $text; ?></textarea>
        <textarea class="widefat" rows="8" cols="20" id="<?php echo $this->get_field_id('text2'); ?>" name="<?php echo $this->get_field_name('text2'); ?>"><?php echo $text2; ?></textarea>

        <p><input id="<?php echo $this->get_field_id('filter'); ?>" name="<?php echo $this->get_field_name('filter'); ?>" type="checkbox" <?php checked(isset($instance['filter']) ? $instance['filter'] : 0); ?> />&nbsp;<label for="<?php echo $this->get_field_id('filter'); ?>"><?php _e('Automatically add paragraphs'); ?></label></p>
<?php
    }
}
//Now you need to register your widget. Remember to change it to whatever you named your widget
add_action( 'widgets_init', create_function( '', 'register_widget( "RT_Widget_Text" );' ) );

盡管如此，我認為你的bug可能是你的widget( $args, instance)方法中的一個簡單的錯誤：

$text = apply_filters( 'widget_text', empty( $instance['text'] ) ? '' : $instance['text'], $instance );
$text = apply_filters( 'widget_text2', empty( $instance['text2'] ) ? '' : $instance['text2'], $instance );

請注意，您在此處設置$text =兩次。 所以你基本上覆蓋了文本的值，並用text2替換它。 然后，將text2 null留空。

如果這不是你的問題，那么它可能與將窗口小部件注冊為“文本”有關，因為它是由WP_Widget_Text占用的。 這不太可能，因為我假設你直接編輯了WP_Widget_Text類。