描述:
通过id获取文章/页面所有的自定义字段(post meta)的键(key)
用法:
<?php get_post_custom_keys($post_id); ?>
参数:
$post_id
(integer) (可选) 将检索其自定义字段键的文章 ID。
默认值: 当前文章
示例:
<?php
$custom_field_keys = get_post_custom_keys();
foreach ( $custom_field_keys as $key => $value ) {
$valuet = trim($value);
if ( '_' == $valuet{0} )
continue;
echo $key . " => " . $value . "<br />";
}
?>
源文件:
/**
* Retrieve meta field names for a post.
*
* If there are no meta fields, then nothing (null) will be returned.
*
* @since 1.2.0
*
* @param int $post_id Optional. Post ID. Default is ID of the global $post.
* @return array|void Array of the keys, if retrieved.
*/
function get_post_custom_keys( $post_id = 0 ) {
$custom = get_post_custom( $post_id );
if ( !is_array($custom) )
return;
if ( $keys = array_keys($custom) )
return $keys;
}