Question

我在这里按照教程http://wp.smashingmagazine.com/2011/10/04/create-custom-post-meta-boxes-wordpress/

我在教程中按预期工作，但不是添加类我只想将内容添加到footer.php文件中：

以下是我在functions.php

中的教程中的代码

/* Fire our meta box setup function on the post editor screen. */
add_action( 'load-post.php', 'smashing_post_meta_boxes_setup' );
add_action( 'load-post-new.php', 'smashing_post_meta_boxes_setup' );


/* Meta box setup function. */
function smashing_post_meta_boxes_setup() {

    /* Add meta boxes on the 'add_meta_boxes' hook. */
    add_action( 'add_meta_boxes', 'smashing_add_post_meta_boxes' );

    /* Save post meta on the 'save_post' hook. */
    add_action( 'save_post', 'smashing_save_post_class_meta', 10, 2 );
}


/* Create one or more meta boxes to be displayed on the post editor screen. */
function smashing_add_post_meta_boxes() {

    add_meta_box(
        'smashing-post-class',          // Unique ID
        esc_html__( 'Post Class', 'example' ),      // Title
        'smashing_post_class_meta_box',     // Callback function
        'post',                 // Admin page (or post type)
        'side',                 // Context
        'default'                   // Priority
    );
}

/* Display the post meta box. */
function smashing_post_class_meta_box( $object, $box ) { ?>

    <?php wp_nonce_field( basename( __FILE__ ), 'smashing_post_class_nonce' ); ?>

    <p>
        <label for="smashing-post-class"><?php _e( "Add a custom CSS class, which will be applied to WordPress' post class.", 'example' ); ?></label>
        <br />
        <input class="widefat" type="text" name="smashing-post-class" id="smashing-post-class" value="<?php echo esc_attr( get_post_meta( $object->ID, 'smashing_post_class', true ) ); ?>" size="30" />
    </p>
<?php }


/* Save the meta box's post metadata. */
function smashing_save_post_class_meta( $post_id, $post ) {

    /* Verify the nonce before proceeding. */
    if ( !isset( $_POST['smashing_post_class_nonce'] ) || !wp_verify_nonce( $_POST['smashing_post_class_nonce'], basename( __FILE__ ) ) )
        return $post_id;

    /* Get the post type object. */
    $post_type = get_post_type_object( $post->post_type );

    /* Check if the current user has permission to edit the post. */
    if ( !current_user_can( $post_type->cap->edit_post, $post_id ) )
        return $post_id;

    /* Get the posted data and sanitize it for use as an HTML class. */
    $new_meta_value = ( isset( $_POST['smashing-post-class'] ) ? sanitize_html_class( $_POST['smashing-post-class'] ) : '' );

    /* Get the meta key. */
    $meta_key = 'smashing_post_class';

    /* Get the meta value of the custom field key. */
    $meta_value = get_post_meta( $post_id, $meta_key, true );

    /* If a new meta value was added and there was no previous value, add it. */
    if ( $new_meta_value && '' == $meta_value )
        add_post_meta( $post_id, $meta_key, $new_meta_value, true );

    /* If the new meta value does not match the old value, update it. */
    elseif ( $new_meta_value && $new_meta_value != $meta_value )
        update_post_meta( $post_id, $meta_key, $new_meta_value );

    /* If there is no new meta value but an old value exists, delete it. */
    elseif ( '' == $new_meta_value && $meta_value )
        delete_post_meta( $post_id, $meta_key, $meta_value );
}


/* Filter the post class hook with our custom post class function. */
add_filter( 'post_class', 'smashing_post_class' );

function smashing_post_class( $classes ) {

    /* Get the current post ID. */
    $post_id = get_the_ID();

    /* If we have a post ID, proceed. */
    if ( !empty( $post_id ) ) {

        /* Get the custom post class. */
        $post_class = get_post_meta( $post_id, 'smashing_post_class', true );

        /* If a post class was input, sanitize it and add it to the post class array. */
        if ( !empty( $post_class ) )
            $classes[] = sanitize_html_class( $post_class );
    }

    return $classes;
}

如何在没有任何额外内容的情况下将输入到该字段的数据回显到我的footer.php？

<?--php global $post; echo get_post_meta($post->ID,'smashing-post-class',true) ?>
</body>
</html>

Answer 1

在您的footer.php中，您可以拨打global $post来访问存储在那里的信息。例如：

<?--php global $post; echo get_post_meta($post->ID,'smashing-post-class',true) ?>

将Metabox数据打印到页脚？

1 个答案: