我想使用Transient API来加快网站加载速度。我在小部件中使用此代码但在所有小部件中只显示最后的帖子而不是特定类别的帖子
<?php
// Creating the widget
class wpb_box extends WP_Widget {
function __construct() {
parent::__construct(
// Base ID of your widget
'wpb_box',
// Widget name will appear in UI
__('ابزارک اختصاصی باکس مطالب خبرخوان', 'bigtheme'),
// Widget description
array( 'description' => __( 'ابزارک نمایش باکس مطالب از سایت های مختلف توسط آدرس خوراک یا فید سایت', 'bigtheme' ), )
);
add_action('save_post', array( $this, 'delete_query_caches') );
}
// Creating widget front-end
// This is where the action happens
/**
* Delete transients
*/
function delete_query_caches( $post_id ){
if( !isset( $_POST['post_type'] ) || $_POST['post_type'] !== 'post' ) return;
$categories = wp_get_post_terms( $post_id, 'category' );
if( $categories && ! is_WP_Error( $categories ) ) {
foreach( $categories as $cat ) {
delete_transient('foo_featured_posts_' . $category);
}
}
}
public function widget( $args, $instance ) {
$name = apply_filters( 'widget_title', $instance['name'] );
$category = apply_filters( 'widget_title', $instance['category'] );
$id = apply_filters( 'widget_title', $instance['id'] );
$link = apply_filters( 'widget_title', $instance['link'] );
$display = apply_filters( 'widget_title', $instance['display'] );
$color = apply_filters( 'widget_title', $instance['color'] );
// This is where you run the code and display the output
?>
<div class="col-sm-6 col-xs-12 padding5">
<div class="article">
<div class="title">
<h3><a href="<?php echo $link ?>" target="_blank"><?php echo $name ?></a></h3>
<div class="clear"></div>
<div class="line"></div>
</div>
<?php
if ( false === ( $slider = get_transient( 'foo_featured_posts_' . $category ) ) ) {
$slider = new WP_Query(array(
'post_status' =>'publish',
'post_type' =>'post',
'cat' =>''.$category.'',
'posts_per_page' =>'9'
));
// Make a new query cache for 1 week
set_transient( 'foo_featured_posts_' . $category, $slider, 10 * MINUTE_IN_SECONDS );
}
if( !$slider->have_posts() ) return; ?>
<ul>
<?php while( $slider->have_posts() ) : $slider->the_post(); ?>
<li>
<a href="<?php the_permalink() ?>" target="_blank"><?php the_title(); ?></a>
<div style="display:<?php echo $display;?>" class="tooltiptext hidden-xs"><?php the_excerpt(); ?></div>
</li>
<?php endwhile; $slider->rewind_posts(); ?>
</ul>
<?php wp_reset_postdata(); ?>
<div class="list"><a href="<?php echo $link ?>" target="_blank">مشاهده آرشیو کامل</a><a href="<?php echo $link ?>/feed" target="_blank"><img src="<?php bloginfo('template_url'); ?>/images/rss.png" width="18" height="18" alt="خوراک سایت" ></a></div>
</div>
</div>
<?php
echo $args['after_widget'];
}
public function form( $instance ) {
$name = ( isset( $instance[ 'name' ] ) ) ? $instance[ 'name' ] : '';
$category = ( isset( $instance[ 'category' ] ) ) ? $instance[ 'category' ] : '';
$link = ( isset( $instance[ 'link' ] ) ) ? $instance[ 'link' ] : '';
$color = ( isset( $instance[ 'color' ] ) ) ? $instance[ 'color' ] : '';
$id = ( isset( $instance[ 'id' ] ) ) ? $instance[ 'id' ] : '';
$display = ( isset( $instance[ 'display' ] ) ) ? $instance[ 'display' ] : '';
?>
<p>
<label for="<?php echo $this->get_field_id( 'color' ); ?>"><?php _e( 'رنگ باکس مطالب:' ); ?></label>
<input class="widefat" id="<?php echo $this->get_field_id( 'color' ); ?>" name="<?php echo $this->get_field_name( 'color' ); ?>" type="text" value="<?php echo esc_attr( $color ); ?>" placeholder="مثال : #CCC , #dd3333 , black , blue" />
</p>
<p>
<label for="<?php echo $this->get_field_id( 'name' ); ?>"><?php _e( 'عنوان باکس:' ); ?></label>
<input class="widefat" id="<?php echo $this->get_field_id( 'name' ); ?>" name="<?php echo $this->get_field_name( 'name' ); ?>" type="text" value="<?php echo esc_attr( $name ); ?>" />
</p>
<p>
<label for="<?php echo $this->get_field_id( 'id' ); ?>"><?php _e( 'آی دی دسته بندی' ); ?></label>
<input class="widefat" id="<?php echo $this->get_field_id( 'id' ); ?>" name="<?php echo $this->get_field_name( 'id' ); ?>" type="text" value="<?php echo esc_attr( $id ); ?>" />
</p>
<select id="<?php echo $this->get_field_id('category'); ?>" name="<?php echo $this->get_field_name('category'); ?>" class="widefat" style="width:100%;">
<?php foreach(get_terms('category','parent=0&hide_empty=0') as $term) { ?>
<option <?php selected( $instance['category'], $term->term_id ); ?> value="<?php echo $term->term_id; ?>"><?php echo $term->name; ?></option>
<?php } ?>
</select>
<p>
<label for="<?php echo $this->get_field_id( 'link' ); ?>"><?php _e( 'لینک آرشیو' ); ?></label>
<input class="widefat" id="<?php echo $this->get_field_id( 'link' ); ?>" name="<?php echo $this->get_field_name( 'link' ); ?>" type="text" value="<?php echo esc_attr( $link ); ?>" />
</p>
<p>
<label><?php _e( 'نمایش توضیحات مطالب' ); ?></label>
<select class="widefat" id="<?php echo $this->get_field_id( 'display' ); ?>" name="<?php echo $this->get_field_name( 'display' ); ?>">
<option <?php selected( $instance['display'], 'block'); ?> value="block">بله</option>
<option <?php selected( $instance['display'], 'none'); ?> value="none">خیر</option>
</select>
</p>
<?php
}
// Updating widget replacing old instances with new
public function update( $new_instance, $old_instance ) {
$instance = array();
$instance['name'] = ( ! empty( $new_instance['name'] ) ) ? strip_tags( $new_instance['name'] ) : '';
$instance['category'] = ( ! empty( $new_instance['category'] ) ) ? strip_tags( $new_instance['category'] ) : '';
$instance['link'] = ( ! empty( $new_instance['link'] ) ) ? strip_tags( $new_instance['link'] ) : '';
$instance['link2'] = ( ! empty( $new_instance['link2'] ) ) ? strip_tags( $new_instance['link2'] ) : '';
$instance['id'] = ( ! empty( $new_instance['id'] ) ) ? strip_tags( $new_instance['id'] ) : '';
$instance['link3'] = ( ! empty( $new_instance['link3'] ) ) ? strip_tags( $new_instance['link3'] ) : '';
$instance['link4'] = ( ! empty( $new_instance['link4'] ) ) ? strip_tags( $new_instance['link4'] ) : '';
$instance['link5'] = ( ! empty( $new_instance['link5'] ) ) ? strip_tags( $new_instance['link5'] ) : '';
$instance['color'] = ( ! empty( $new_instance['color'] ) ) ? strip_tags( $new_instance['color'] ) : '';
$instance['display'] = ( ! empty( $new_instance['display'] ) ) ? strip_tags( $new_instance['display'] ) : '';
$instance['source'] = ( ! empty( $new_instance['source'] ) ) ? strip_tags( $new_instance['source'] ) : '';
$instance['time'] = ( ! empty( $new_instance['time'] ) ) ? strip_tags( $new_instance['time'] ) : '';
return $instance;
}
} // Class wpb_box ends here
// Register and load the widget
function wpb_box() {
register_widget( 'wpb_box' );
}
add_action( 'widgets_init', 'wpb_box' );
?>
但是这个代码是否正确使用瞬态api？＃
答案 0 :(得分：1)
您只创建了一个瞬态：foo_featured_posts。
set_transient( 'foo_featured_posts', $featured, 10 * MINUTE_IN_SECONDS );
如果要为不同类别显示不同的内容，则应为每个类别创建一个瞬态：foo_featured_posts_cat_1，foo_featured_posts_cat_2等。
set_transient( 'foo_featured_posts_' . $category, $featured, 10 * MINUTE_IN_SECONDS );