我想根据添加在元字段中的数字对我的文章进行分类。

这是第一步，我要在页面上显示文章。

<?php
    $cat = get_post_meta( get_the_ID(), \'cat_page\', true );
?>

我开始循环。这是在这个循环中，我得到了我的自定义元字段。

<?php if ( $cat ) {
    // run the custom query
    $query = new WP_Query( \'category_name=\' . $cat );

    // run the custom loop
    while ( $query->have_posts() ) { $query->the_post(); $my_meta = get_post_meta( $post->ID, \'_my_meta\', true ); ?>

But how sort by a specific key of the meta (-> $my_meta[\'niveau-chiffre\'])

我试过这样的

<?php
    $my_meta = get_post_meta( $post->ID, \'_my_meta\', true );
    $cat = get_post_meta( get_the_ID(), \'cat_page\', true );

    $args = array(
        \'category_name\' => $cat,
        \'meta_key\' => \'_my_meta\',
        \'orderby\' => \'meta_value\',
        \'order\' => \'ASC\',
        \'meta_query\' => array(
            array(
               \'key\' => \'_my_meta\',
               \'value\' => \'niveau-chiffre\',
               \'meta_value\' => \'niveau-chiffre\',
               \'compare\' => \'>=\',
               \'type\' => \'NUMERIC\'
            )
        )
    );
?>

和回路

<?php if ( $cat ) {
    // run the custom query
    $query = new WP_Query( $args );

    // run the custom loop
    while ( $query->have_posts() ) { $query->the_post(); $my_meta = get_post_meta( $post->ID, \'_my_meta\', true ); ?>

但在这一点上，我认为元变量（\\u my\\u meta）没有。

EDIT

我的meta在数据库中看起来像这样

我尝试过这样的东西，多亏了Generate WP

<?php
    $cat = get_post_meta( get_the_ID(), \'cat_page\', true );

    $args = array(
        \'category_name\' => $cat,
        \'order\' => \'ASC\',
        \'meta_query\' => array(
            array(
               \'key\' => \'_my_meta\',
               \'value\' => \'niveau-chiffre\',
               \'type\' => \'NUMERIC\'
            )
        ),
        \'orderby\' => \'meta_value_num\'
    );
?>

但它也不起作用。

<?php
$cat = get_post_meta( get_the_ID(), \'cat_page\', true );

$args = array(
    \'category_name\' => $cat,
    \'meta_key\' => \'niveau_chiffre\',
    \'orderby\' => \'meta_value_num\', //Since we\'re dealing with numbers
    \'order\' => \'ASC\',
    //\'meta_query\' => array(
       // array(
           //\'key\' => \'niveau-chiffre\',
           //\'value\' => \'niveau-chiffre\', Don\'t give a value because we\'re not looking for a specific one
           //\'compare\' => \'>=\', We\'re not comparing as such. Defaults to =
           //\'type\' => \'NUMERIC\'
        //)
    ), //You missed a comma here I think
);