Function Reference/get post custom keys

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Description

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()

Usage

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

Parameters

tt$post_id/tt
(integer) (optional) The post ID whose custom field keys will be retrieved.
Default: Current postnoinclude

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Notes

This template is for standardizing how parameters look in the Function Reference and in Template Tags. Here is an example of this template being called: prenowiki检查到模板循环:模板:Parameter/nowiki/pre 检查到模板循环:模板:Parameter

The usage of this template is below: prenowiki检查到模板循环:模板:Parameter/nowiki/pre Let's take a closer look at the parameters..

name
The name of the parameter.
datatype
The datatype that should be given for this parameter when called.
  • string
  • integer
  • boolean
  • mixed
description
A short description of the parameter.
importance
Set this parameter to optional if the parameter is optional. Otherwise, do not declare this parameter—it defaults to required.
  • required
  • optional
default
If this parameter is optional, ttdefault/tt is the value that will be used if the parameter is not declared.

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Examples

Default Usage

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. Note: the if test excludes values for WordPress internally maintained custom keys such as _edit_last and _edit_lock.

<?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 />";
  }
?>

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

0 => mykey
1 => yourkey

Note: Regardless of how many values (custom fields) are assigned to one key, that key will only appear once in this array.

Source File

get_post_custom_keys() is located in onlyincludecodewp-includes/post.php/code/onlyinclude

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Template Description

Link to the source code on http://core.trac.wordpress.org/browser/.

Parameters

  1. filename
  2. (option) path to codetag/code (version) or codetrunk/code. This option is only used for a new function.br /Default: codetrunk/code -- trunk is the latest bleeding edge development version of WordPress.

Usage

Link to the stable version: pre检查到模板循环:模板:Trac/pre

Link to trunk: pre检查到模板循环:模板:Trac/pre

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Related

Custom Fields: the_meta, get_post_meta, add_post_meta, update_post_meta, delete_post_meta, get_post_custom, get_post_custom_values, get_post_custom_keys (See Also: post_meta Function Examples)

includeonlydiv style=clear:both; background-color:#F7F7F7; border:1px solid #CCCCCC; color:#000000; padding:7px; margin:0.5em auto 0.5em auto; vertical-align:middle;See also index of Function Reference and index of Template Tags./div/includeonlynoinclude

Description

This Template is used by Codex:Template Messages.

Usage

pre 检查到模板循环:模板:Message /pre

Result

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