具有动态生成的名称作为函数参数的 Wordpress 瞬变

Question

希望你能帮助我解决这个问题：

我在短代码函数中有几个不同 post 类型的查询。现在我试图用瞬态存储这些查询。但是这些瞬态需要为调用短代码的每个页面都有一个唯一的名称。

$trans_posts_golfcourse_ = 'trans_posts_golfcourse_'.$landingpage;

if( false === ( $$trans_posts_golfcourse_ = get_transient( 'trans_posts_golfcourse_' ) ) ) {

    $args = array (
        'posts_per_page'=> 5,
        'post__in'      => $posts_golfcourse,
        'post_type'     => 'golfcourse',
        'post_status'   => 'publish',
        'cache_results' => false,
    );

    $$trans_posts_golfcourse_ = new WP_Query( $args );

    set_transient( 'trans_posts_golfcourse_', $$trans_posts_golfcourse_, 60*60*4 );
}

动态生成的变量名是

$$trans_posts_golfcourse_

但这作为一个参数怎么看起来像？:

get_transient( 'trans_posts_golfcourse_' )

提前致谢！

编辑：找到动态变量作为参数的解决方案 参数（字符串）必须以与变量名相同的方式生成：

 get_transient( 'trans_posts_golfcourse_'.$landingpage )

完整代码：

$trans_posts_golfcourse_ = 'trans_posts_golfcourse_'.$landingpage;
if( false === ( ${$trans_posts_golfcourse_} = get_transient( 'trans_posts_golfcourse_'.$landingpage ) ) ) {

    $args = array (
        'posts_per_page'=> 5,
        'post__in'      => $posts_golfcourse,
        'post_type'     => 'golfcourse',
        'post_status'   => 'publish',
        'cache_results' => false,
    );

    ${$trans_posts_golfcourse_} = new WP_Query( $args );

    set_transient( 'trans_posts_golfcourse_'.$landingpage, ${$trans_posts_golfcourse_}, 60*60*4 );
}

编辑：Transient 没有减少查询，尽管 transient 似乎被正确调用。有人有想法吗？

Answer 1

解决方案是将查询和循环放在瞬态中。有两种可能的方法：

函数内部（短代码 f.e。）

    function get_content( $dynamic_var ){
        $transient_time = 60*60*4;
        $transient_name = "transient_name_" . $dynamic_var;

        $content = get_transient( $transient_key );
        if( !empty($content)  ) { return $content; }

        $args = array ('');
        $query = new WP_Query( $args );

        $content = '';
        if( $query->have_posts() ):
            while( $query->have_posts() ) : $query->the_post();
                $content.= 'some_content';
            endwhile; wp_reset_postdata();
        endif;

        set_transient( $transient_name, $content, $transient_time );
        return $content;
    }

在模板中

        $transient_time = 60*60*4;
        $transient_name = 'transient_name_' . $page_id;
        // ${$transient_name} > name of variable is dynamically created by
        // the value of variable $transient_name (search for > php variable variables)

        $content = '';
        if( false === ( ${$transient_name} = get_transient( $transient_name ) ) ) {
            $args = array ('');
            $query = new WP_Query( $args );

            $content_inner = '';
            if( $query->have_posts() ):
                while( $query->have_posts() ) : $query->the_post();
                    $content_inner.= 'some_content';
                endwhile; wp_reset_postdata();
            endif;

            set_transient( $content_inner, ${$transient_name}, $transient_time );
        }
        $content.= ${$transient_name};

具有动态生成的名称作为函数参数的 Wordpress 瞬变

Wordpress transients with dynamically generated name as parameter in function

php

wordpress

dynamic

variable-names