我认为这应该是可行的，但我对“not”空字符串的高级元查询不是百分之百确定。这通常不是元查询的使用方式。因此，我离开了set_transient 行已注释掉。我刚刚注意到您正在尝试随机抽取1个帖子，因此您可能不想使用Transients API 虽然如此，但我认为缩短时间限制仍然是一个好主意，因此我将瞬态设置为存储1小时。如果没有，则始终可以提取查询部分。

// Get any existing copy of our transient data
if ( false === ( $custom_testimonials = get_transient( \'custom_testimonials\' ) ) ) {
    // It wasn\'t there, so regenerate the data and save the transient

   // params for our query

   array(); ?


    $args = array(
        \'post_type\' => \'our-clients-list\'
       \'posts_per_page\'  => 1,
       \'orderby\' => \'rand\'
       \'meta_key\'        => \'_featured\',
       \'meta_value\'      => \'yes\',
        \'meta_query\' => array(
            array(
                \'key\' => \'testimonial_\',
                \'value\' => \'\',
                \'compare\' => \'!=\'
            )
        )
    );

    // The Query
    $custom_testimonials = new WP_Query( $args );

    // store the transient - uncomment when sure the query is working (stores for 1 hour)
    // set_transient( \'custom_testimonials\', $custom_testimonials, 60*60*1 );

}

// Use the data like you would have normally...

// The Loop
if ( $custom_testimonials ) :

    echo \'<ul class="testimonial">\';

    while ( $custom_testimonials->have_posts() ) :
        $custom_testimonials->the_post();
        echo \'<li>\' . get_the_title() . \'</li>\';
    endwhile;

    echo \'</ul>\';

else :

echo \'No testimonials found.\';

endif;

/* Restore original Post Data
 * NB: Because we are using new WP_Query we aren\'t stomping on the
 * original $wp_query and it does not need to be reset.
*/
wp_reset_postdata();

我认为这应该是可行的，但我对“not”空字符串的高级元查询不是百分之百确定。这通常不是元查询的使用方式。因此，我离开了set_transient 行已注释掉。我刚刚注意到您正在尝试随机抽取1个帖子，因此您可能不想使用Transients API 虽然如此，但我认为缩短时间限制仍然是一个好主意，因此我将瞬态设置为存储1小时。如果没有，则始终可以提取查询部分。

// Get any existing copy of our transient data
if ( false === ( $custom_testimonials = get_transient( \'custom_testimonials\' ) ) ) {
    // It wasn\'t there, so regenerate the data and save the transient

   // params for our query

   array(); ?


    $args = array(
        \'post_type\' => \'our-clients-list\'
       \'posts_per_page\'  => 1,
       \'orderby\' => \'rand\'
       \'meta_key\'        => \'_featured\',
       \'meta_value\'      => \'yes\',
        \'meta_query\' => array(
            array(
                \'key\' => \'testimonial_\',
                \'value\' => \'\',
                \'compare\' => \'!=\'
            )
        )
    );

    // The Query
    $custom_testimonials = new WP_Query( $args );

    // store the transient - uncomment when sure the query is working (stores for 1 hour)
    // set_transient( \'custom_testimonials\', $custom_testimonials, 60*60*1 );

}

// Use the data like you would have normally...

// The Loop
if ( $custom_testimonials ) :

    echo \'<ul class="testimonial">\';

    while ( $custom_testimonials->have_posts() ) :
        $custom_testimonials->the_post();
        echo \'<li>\' . get_the_title() . \'</li>\';
    endwhile;

    echo \'</ul>\';

else :

echo \'No testimonials found.\';

endif;

/* Restore original Post Data
 * NB: Because we are using new WP_Query we aren\'t stomping on the
 * original $wp_query and it does not need to be reset.
*/
wp_reset_postdata();