WordPress:Function Reference/get post custom keys

描述

Returns an array containing the keys of all custom fields of a particular post or page. See also get_post_custom() and get_post_custom_values()

返回一个数组，包含某篇文章或者网页的所有自定义fields。也看看get_post_custom() 和get_post_custom_values()

用法

%%% <?php get_post_custom_keys($post_id); ?> %%%

%%% <?php get_post_custom_keys($post_id); ?> %%%

例子

默认用法

The following example will set a variable ($custom_field_keys) as an array containing the keys of all custom fields in the current post, and then print it.

<?php

下面的例子会将一个变数(<tt>$custom_field_keys</tt>)设置为一个数组，包含当前文章的所有自定义fields的关键词，然后再输出。
<pre><?php

  $custom_field_keys = get_post_custom_keys();
  foreach ( $custom_field_keys as $key => $value )
    echo $key . " => " . $value . "<br />";

?>

If the post contains custom fields with the keys mykey and yourkey, the output would be:

0 => mykey
1 => yourkey
2 => _edit_last
3 => _edit_lock
4 => _wp_page_template

 $custom_field_keys = get_post_custom_keys();
 foreach ( $custom_field_keys as $key => $value )
   echo $key . " => " . $value . "
";

?>

如果文章包含关键字为 mykey and yourkey的自定义field,输出就会是:

0 => mykey
1 => yourkey
2 => _edit_last
3 => _edit_lock
4 => _wp_page_template

Note: Regardless of how many values (custom fields) are assigned to one key, that key will only appear once in this array. 注:不管一个关键字分配了多少参数值（自定义fields），关键字在数组中只显示一次。

相关的

add_post_meta(), delete_post_meta(), get_post_meta(), update_post_meta(), get_post_custom(), get_post_custom_values()

add_post_meta(), delete_post_meta(), get_post_meta(), update_post_meta(), get_post_custom(), get_post_custom_values()