以前曾经分享了一篇 给wordpress后台小工具增加一个随机文章,但没有附加缩略图的功能,为了让你的随机文章看起来更吸睛,这里加上特色图像的缩略图,效果如本站左边栏的随机文章,步骤和代码如下:
开始之前你需要了解 widget 函数如何创建自定义侧边栏小工具,本站有篇文章详细介绍了用法和实例,wordpress主题开发创建你喜欢的小工具
流程:
二、在functions.PHP文件中导入rand-posts.PHP,这样做的目的是不让functions.PHP太臃肿,独立出来好管理。
/**
*/
require get_template_directory() . '/inc/rand-posts.PHP';
三、根据你的主题样式,在style.css定义你的前端显示样式,为了你方便修改样式表,我这里给 li 加了类class='rp-thumb'。
rand-posts.PHP源码
点击 rand-posts.PHP源码
/**
*
* web:www.511yj.com
*/
class yj_Random_Posts extends WP_Widget {
public function __construct() {
parent::__construct(
'yj_rp_random',// Base ID
array( 'description' => __( 'yj-带缩略图的随机文章小工具.','yj' ),) // Args
);
}
public function widget( $args,$instance ) {
if (isset($instance['title'])) :
$title = apply_filters( 'widget_title',$instance['title'] );
$no_of_posts = apply_filters( 'no_of_posts',$instance['no_of_posts'] );
else :
$title = __('Latest Posts','yj');
$no_of_posts = 5;
endif;
echo $args['before_widget'];
if ( ! empty( $title ) )
echo $args['before_title'] . $title . $args['after_title'];
// WP_Query arguments
$qa = array (
'post_type' => 'post',
'posts_per_page' => $no_of_posts,
'offset' => 0,
'ignore_sticky_posts' => 1,
'orderby' =>'rand'
);
// The Query
$recent_articles = new WP_Query( $qa );
if($recent_articles->have_posts()) : ?>
PHP if( has_post_thumbnail() ) : ?>
PHP the_permalink(); ?>">PHP the_post_thumbnail('thumbnail'); ?>else :
?>
PHP the_permalink(); ?>">PHP echo get_stylesheet_directory_uri(); ?>/images/511yj.jpg">endif; ?>
PHP the_permalink(); ?>">PHP the_title(); ?>PHP the_time('Y-m-j'); ?>endwhile;
else:
?>
Oops,there are no posts.
endif;
?>
echo $args['after_widget'];
}
public function form( $instance ) {
if ( isset( $instance[ 'title' ] ) ) {
$title = $instance[ 'title' ];
}
else {
}
if ( isset( $instance[ 'no_of_posts' ] ) ) {
$no_of_posts = $instance[ 'no_of_posts' ];
}
else {
$no_of_posts = __( '5','yj' );
}
?>
PHP echo $this->get_field_id( 'title' ); ?>" name="PHP echo $this->get_field_name( 'title' ); ?>" type="text" value="PHP echo esc_attr( $title ); ?>" />
PHP echo $this->get_field_id( 'no_of_posts' ); ?>" name="PHP echo $this->get_field_name( 'no_of_posts' ); ?>" type="text" value="PHP echo esc_attr( $no_of_posts ); ?>" />
}
public function update( $new_instance,$old_instance ) {
$instance = array();
$instance['title'] = ( ! empty( $new_instance['title'] ) ) ? strip_tags( $new_instance['title'] ) : '';
$instance['no_of_posts'] = ( ! empty( $new_instance['no_of_posts'] ) ) ? strip_tags( $new_instance['no_of_posts'] ) : '5';
if ( is_numeric($new_instance['no_of_posts']) == false ) {
$instance['no_of_posts'] = $old_instance['no_of_posts'];
}
return $instance;
}
}
add_action('widgets_init',create_function('','return register_widget("yj_Random_Posts");'));
?>
while($recent_articles->have_posts()) :
$recent_articles->the_post();
?>