我正在尝试创建一个自定义元框，让您可以动态添加行。下面的代码片段工作正常，并将数据保存在“编辑页面”部分。但是，我无法让它在实际页面上显示数据：

    add_action( \'add_meta_boxes\', \'dynamic_add_custom_box\' );

    /* Do something with the data entered */
    add_action( \'save_post\', \'dynamic_save_postdata\' );

    /* Adds a box to the main column on the Post and Page edit screens */
    function dynamic_add_custom_box() {
        add_meta_box(
            \'dynamic_sectionid\',
    __( \'My Tracks\', \'myplugin_textdomain\' ),
    \'dynamic_inner_custom_box\',
    \'page\');
    }

    /* Prints the box content */
     function dynamic_inner_custom_box() {
        global $post;
        // Use nonce for verification
        wp_nonce_field( plugin_basename( __FILE__ ), \'dynamicMeta_noncename\' );
?>
<div id="meta_inner">
<?php

//get the saved meta as an arry
$songs = get_post_meta($post->ID,\'songs\',true);

$c = 0;
if ( count( $songs ) > 0 ) {
    foreach( $songs as $track ) {
        if ( isset( $track[\'title\'] ) || isset( $track[\'track\'] ) ) {
            printf( \'<p>Song Title <input type="text" name="songs[%1$s][title]" value="%2$s" /> -- Track number : <input type="text" name="songs[%1$s][track]" value="%3$s" /><span class="remove">%4$s</span></p>\', $c, $track[\'title\'], $track[\'track\'], __( \'Remove Track\' ) );
            $c = $c +1;
        }
    }
}

        ?>
    <span id="here"></span>
    <span class="add"><?php _e(\'Add Tracks\'); ?></span>
    <script>
        var $ =jQuery.noConflict();
        $(document).ready(function() {
            var count = <?php echo $c; ?>;
            $(".add").click(function() {
                count = count + 1;

        $(\'#here\').append(\'<p> Song Title <input type="text" name="songs[\'+count+\'][title]" value="" /> -- Track number : <input type="text" name="songs[\'+count+\'][track]" value="" /><span class="remove">Remove Track</span></p>\' );
        return false;
    });
    $(".remove").live(\'click\', function() {
        $(this).parent().remove();
    });
});
</script>
    </div><?php

    }

    /* When the post is saved, saves our custom data */
    function dynamic_save_postdata( $post_id ) {
        // verify if this is an auto save routine. 
        // If it is our form has not been submitted, so we dont want to do anything
        if ( defined( \'DOING_AUTOSAVE\' ) && DOING_AUTOSAVE ) 
            return;

        // verify this came from the our screen and with proper authorization,
        // because save_post can be triggered at other times
        if ( !isset( $_POST[\'dynamicMeta_noncename\'] ) )
            return;

        if ( !wp_verify_nonce( $_POST[\'dynamicMeta_noncename\'], plugin_basename( __FILE__ ) ) )
            return;

        // OK, we\'re authenticated: we need to find and save the data

        $songs = $_POST[\'songs\'];

        update_post_meta($post_id,\'songs\',$songs);
    }

正如你所看到的，“页面”指的是我想发布到的页面。现在，当我在页面模板上循环搜索结果时，什么都没有显示。

     <?php            
        $args = array(
\'post_type\' => \'page\',   
    );  
    $repeat_loop = new WP_Query( $args ); if ( $repeat_loop->have_posts() ) : while ( $repeat_loop->have_posts() ) : $repeat_loop->the_post();
    $meta = get_post_meta( $post->ID, \'songs\', true ); ?>                  
    <?php echo $meta[\'title\']; ?><?php echo $meta[\'track\']; ?>
         <?php endwhile; 
             endif;
                wp_reset_postdata(); 
            ?>

当我使用“var\\u dump（$posts）；”时，确实会得到结果。我就是无法在页面中显示它。

<?php
$args = array(
    \'post_type\' => \'page\'
);  
$repeat_loop = new WP_Query( $args ); if ( $repeat_loop->have_posts() ) : while ( $repeat_loop->have_posts() ) : $repeat_loop->the_post();
$meta = get_post_meta( $post->ID, \'songs\', true ); ?>                  

<?php
foreach ($meta as $key => $value) {
    echo $value[\'title\']; ?><?php echo $value[\'track\'];
}
?>
<?php endwhile; 
    endif;
    wp_reset_postdata(); 
?>

    <?php for( $i= 0 ; $i <= 10 ; $i++ ) echo \'<p>\' .$meta[$i][\'title\']. \'</p>\';?>