在Wordpress用户元数据库中存储PHP数组

Question

这对PHP专家来说应该很容易.我通过update_user_meta函数在Wordpress中存储和拉取数组时遇到问题.

所以我有一个像这样构建的关联数组:

Array
(
    [film_genres] => Array
        (
            [action] => 50
            [comedy] => 50
            [crime] => 50
            [documentary] => 50
            [drama] => 50
            [family] => 50
            [horror] => 50
            [romantic] => 50
            [sci-fi] => 50
            [thriller] => 50
        )

    [film_types] => Array
        (
            [blockbuster] => 0
            [independent] => 0
        )

    [film_eras] => Array
        (
            [1920s_1940s] => 0
            [1950s_1960s] => 0
            [1970s_1980s] => 0
            [1990s_2000s] => 0
            [post_2010] => 0
            [pre_1920s] => 0
        )

    [last_updated] => 2011-10-12 21:21:28
)

但是当我通过以下方式更新用户元表中的这些数据时:

update_user_meta($ user_id,$ meta_key,$ meta_value,$ prev_value)

数据被正确放入数据库中,但是当我调用数据并将新数组打印到屏幕时,它在数组中有一个嵌套数组键[0],如下所示:

Array
(
    [0] => Array
        (
            [film_genres] => Array
                (
                    [action] => 50
                    [comedy] => 50
                    [crime] => 50
                    [documentary] => 50
                    [drama] => 50
                    [family] => 50
                    [horror] => 50
                    [romantic] => 50
                    [sci-fi] => 50
                    [thriller] => 50
                )

            [film_types] => Array
                (
                    [blockbuster] => 0
                    [independent] => 0
                )

            [film_eras] => Array
                (
                    [1920s_1940s] => 0
                    [1950s_1960s] => 0
                    [1970s_1980s] => 0
                    [1990s_2000s] => 0
                    [post_2010] => 0
                    [pre_1920s] => 0
                )

            [last_updated] => 2011-10-12 21:21:28
        )

)

我怎样才能让它像我的第一个数组一样存储数组？我通过WP命令拉取元值数组:

$wp_user_film_prefs_arr = get_user_meta( $wp_user_id, $wp_user_film_prefs_key_label, false );

有什么我做错了吗？提前致谢!!!

Answer 1

您需要将最后一个参数设置false为true:

$wp_user_film_prefs_arr = get_user_meta( $wp_user_id, $wp_user_film_prefs_key_label, true );

第三个参数是$single:

(boolean)(可选)如果是元数据字段的true返回值,如果为false则返回一个数组.

默认值:false

这可能听起来在你的眼中反效果,但元数据字段可以包含多个值.在您的情况下,您不需要它,但单个值.单个值是您的数组.

另见:get user meta^{食品法典委员会}