我使用下面的代码为 WordPress 中的帖子创建一个元框。但问题是这些元框也出现在自定义字段中。我不希望这些元框显示在自定义字段中。有什么方法可以避免在自定义字段中不显示元框，因为在自定义字段中显示元框是没有用的
$meta_boxes_video =
array(
"hotel name1" => array(
"name" => "hotel_name1",
"type" => "input",
"title" => "<strong>Hotel Name</strong> (Required)",
"description" => ""),
"price1" => array(
"name" => "price1",
"type" => "input",
"title" => "<strong>Price</strong>",
"description" => ""),
"hotel name2" => array(
"name" => "hotel_name2",
"type" => "input",
"title" => "<strong>Hotel Name</strong> (Required)",
"description" => ""),
"price2" => array(
"name" => "price2",
"type" => "input",
"title" => "<strong>Price</strong>",
"description" => ""),
"hotel name3" => array(
"name" => "hotel_name3",
"type" => "input",
"title" => "<strong>Hotel Name</strong> (Required)",
"description" => ""),
"price3" => array(
"name" => "price3",
"type" => "input",
"title" => "<strong>Price</strong>",
"description" => ""),
"hotel name4" => array(
"name" => "hotel_name4",
"type" => "input",
"title" => "<strong>Hotel Name</strong> (Required)",
"description" => ""),
"price4" => array(
"name" => "price4",
"type" => "input",
"title" => "<strong>Price</strong>",
"description" => ""),
"hotel name5" => array(
"name" => "hotel_name5",
"type" => "input",
"title" => "<strong>Hotel Name</strong> (Required)",
"description" => ""),
"price5" => array(
"name" => "price5",
"type" => "input",
"title" => "<strong>Price</strong>",
"description" => ""),
"hotel name6" => array(
"name" => "hotel_name6",
"type" => "input",
"title" => "<strong>Hotel Name</strong> (Required)",
"description" => ""),
"price6" => array(
"name" => "price6",
"type" => "input",
"title" => "<strong>Price</strong>",
"description" => ""),
"img_name1" => array(
"name" => "img_name1",
"type" => "input",
"title" => "<strong>Img1</strong> (Required)",
"description" => ""),
"img_name2" => array(
"name" => "img_name2",
"type" => "input",
"title" => "<strong>img2</strong> (Required)",
"description" => ""),
);
function display_video_meta_boxes() {
global $post, $meta_boxes_video;
foreach($meta_boxes_video as $meta_box) {
echo'<input type="hidden" name="'.$meta_box['name'].'_noncename" id="'.$meta_box['name'].'_noncename" value="'.wp_create_nonce( plugin_basename(__FILE__) ).'" />';
echo'<h2>'.$meta_box['title'].'</h2>';
if( $meta_box['type'] == "input" ) {
$meta_box_value = get_post_meta($post->ID, $meta_box['name'].'_value', true);
if($meta_box_value == "")
$meta_box_value = $meta_box['std'];
$meta_box_value = str_replace("\"","'",$meta_box_value);
echo'<input type="text" name="'.$meta_box['name'].'_value" value="'.$meta_box_value.'" size="55" /><br />';
} elseif( $meta_box['type'] == "textarea" ) {
$meta_box_value = get_post_meta($post->ID, $meta_box['name'].'_value', true);
if($meta_box_value == "")
$meta_box_value = $meta_box['std'];
$meta_box_value = str_replace("\"","'",$meta_box_value);
echo'<textarea name="'.$meta_box['name'].'_value" value="'.$meta_box_value.'" style="width:100%" cols="20" rows="1">'.$meta_box_value.'</textarea><br />';
} elseif( $meta_box['type'] == "button" ) {
$meta_box_value = "Add New Source";
if($meta_box_value == "")
$meta_box_value = $meta_box['std'];
$meta_box_value = str_replace("\"","'",$meta_box_value);
echo '<script type="text/javascript">
function test()
{
alert("fgfg");
var element = document.createElement("textarea");
element.setAttribute("value", "Dfdsf");
element.setAttribute("name", "sdfdf");
var foo = document.getElementById("foo");
foo.appendChild(element);
}
</script>';
echo '<div id="foo">';
echo'<input type="button" name="'.$meta_box['name'].'" value="'.$meta_box_value.'" onclick="test();" /><br /></div>';
}
elseif ( $meta_box['type'] == "select" ) {
echo'<select name="'.$meta_box['name'].'_value">';
foreach ($meta_box['options'] as $option) {
echo'<option';
if ( get_post_meta($post->ID, $meta_box['name'].'_value', true) == $option ) {
echo ' selected="selected"';
} elseif ( $option == $meta_box['std'] ) {
echo ' selected="selected"';
}
echo'>'. $option .'</option>';
}
echo'</select>';
} elseif ($meta_box['type'] == "info") {
echo '<p><strong>Add your property images using the "Upload/Insert" button above the content textbox..</p>';
}
echo'<p><label for="'.$meta_box['name'].'_value">'.$meta_box['description'].'</label></p>';
}
}
function create_video_meta_box()
{
if (function_exists('add_meta_box'))
{
add_meta_box( 'ameta_boxes', 'Extra Information', 'display_video_meta_boxes', 'post', 'normal', 'high' );
}
}
function save_video_postdata( $post_id ) {
global $post, $meta_boxes_video;
if( get_post_type() == 'post' ) {
foreach($meta_boxes_video as $meta_box) {
// Verify
if ( !wp_verify_nonce( $_POST[$meta_box['name'].'_noncename'], plugin_basename(__FILE__) )) {
return $post_id;
}
if ( 'page' == $_POST['post_type'] ) {
if ( !current_user_can( 'edit_page', $post_id ))
return $post_id;
} else {
if ( !current_user_can( 'edit_post', $post_id ))
return $post_id;
}
$data = stripslashes($_POST[$meta_box['name'].'_value']);
if(get_post_meta($post_id, $meta_box['name'].'_value') == "")
add_post_meta($post_id, $meta_box['name'].'_value', $data, true);
elseif($data != get_post_meta($post_id, $meta_box['name'].'_value', true))
update_post_meta($post_id, $meta_box['name'].'_value', $data);
elseif($data == "")
delete_post_meta($post_id, $meta_box['name'].'_value', get_post_meta($post_id, $meta_box['name'].'_value', true));
}
}
}
add_action('admin_menu', 'create_video_meta_box');
add_action('save_post', 'save_video_postdata');
在字段名称前面添加下划线将隐藏它。所以：
if(get_post_meta($post_id, '_'.$meta_box['name'].'_value') == "")
add_post_meta($post_id, '_'.$meta_box['name'].'_value', $data, true);
elseif($data != get_post_meta($post_id, '_'.$meta_box['name'].'_value', true))
update_post_meta($post_id, '_'.$meta_box['name'].'_value', $data);
elseif($data == "")
delete_post_meta($post_id, '_'.$meta_box['name'].'_value', get_post_meta($post_id, $meta_box['name'].'_value', true));
您可能还想稍微清理一下您的一些代码。当 update_post_meta 被调用时，如果该字段不存在，它将自动添加该字段，因此您的 add_post_meta 调用在这种情况下是多余的。考虑将其压缩为：
if($data && $data != get_post_meta($post_id, '_'.$meta_box['name'].'_value', true))
update_post_meta($post_id, '_'.$meta_box['name'].'_value', $data); //Runs if $data exists and is different
else
delete_post_meta($post_id, '_'.$meta_box['name'].'_value', get_post_meta($post_id, $meta_box['name'].'_value', true));
或者这个：
if($data)
update_post_meta($post_id, '_'.$meta_box['name'].'_value', $data); //Runs if $data exists
else
delete_post_meta($post_id, '_'.$meta_box['name'].'_value', get_post_meta($post_id, $meta_box['name'].'_value', true));