Prefix everything, 尤其是你的变量。您使用的名称由WordPress内部使用（请参阅注释表单），因此WordPress可能会尝试对表单值进行处理。如果失败，则会出现错误。
虽然$_GET 问题通常很容易调试，$_POST 和$_REQUEST 名字并不是那么简单。
以下列表可能不完整。但它的裸露长度告诉我们一个教训：
Avoid any name you can find in a dictionary. Prefix your form names.
中的保留名称列表$_POST 和$_REQUEST WordPress 3.5使用这些名称在主题或插件中使用时可能会产生副作用。有些仅用于特定页面(removeheader), 多页或多个请求中的其他内容。尽可能避免这些情况。
_ajax_nonce
_page
_per_page
_signup_form
_total
_url
_wp_http_referer
_wp_original_http_referer
_wp_unfiltered_html_comment
_wpnonce
_wpnonce-custom-header-upload
aa
action
action2
active_post_lock
add_new
add_new_users
addmeta
admin_bar_front
admin_color
admin_email
admin_password
admin_password2
ajax
align
allblogs
allusers
alt
approve_parent
approved
attachment
attachment_id
attachments
auth_cookie
author
author_name
autocomplete_type
auto_draft
auto-add-pages
autosave
background-attachment
background-color
background-position-x
background-repeat
banned_email_domains
blog
blog_name
blog_public
blog_upload_space
blogname
bulk_edit
c
calendar
cat
category_base
category_name
catslist
changeit
changes
charset
checkbox
checked
clear-recent-list
closed
comment
comment_approved
comment_author
comment_author_email
comment_author_url
comment_content
comment_date
comment_ID
comment_parent
comment_post_ID
comment_shortcuts
comment_status
comments_listing
comments_popup
confirmdelete
connection_type
content
context
cpage
create-new-attachment
createuser
customize_messenger_channel
customized
customlink-tab
date
date_format
date_format_custom
day
default-header
delete
delete_all
delete_all2
delete_comments
delete_option
delete_tags
delete_widget
deletebookmarks
deletecomment
deleted
deletemeta
deletepost
description
detached
dismiss
display_name
do
edit_date
email
error
exact
excerpt
features
feed
fetch
fheight
file
fileupload_maxk
filter
find_detached
first_comment
first_comment_author
first_comment_url
first_name
first_page
first_post
found_post_id
fwidth
global_terms_enabled
GLOBALS
gmt_offset
guid
height
hh
hidden
hidden_aa
hidden_jj
hidden_mm
hidden_mn
hidden_hh
history
hostname
hour
html-upload
id
ID
ids
id_base
illegal_names
insert-gallery
insertonlybutton
interim-login
item-object
item-type
jj
json
json_data
key
last_name
limited_email_domains
link_id
link_image
link_name
link_rss
link_url
link_visible
linkcheck
locale
locked
log
logged_in_cookie
m
media
media_type
menu
menu_items
menu-item
menu-item-attr-title
menu-item-classes
menu-item-db-id
menu-item-description
menu-item-object
menu-item-object-id
menu-item-parent-id
menu-item-position
menu-item-target
menu-item-title
menu-item-type
menu-item-url
menu-item-xfn
menu-locations
menu-name
message
meta
metakeyinput
metakeyselect
metavalue
minute
mm
mn
mode
monthnum
more
move
multi_number
name
nav-menu-locations
new
new_role
new_slug
new_title
newcat
newcomment_author
newcomment_author_email
newcomment_author_url
newcontent
newuser
nickname
no_placeholder
noapi
noconfirmation
noredir
number
offset
oitar
option
option_page
order
orderby
p
pb
page
page_columns
page_id
page_options
paged
pagegen_timestamp
pagename
parent_id
pass1
pass2
password
permalink_structure
photo_description
photo_src
phperror
ping_status
plugin
plugin_status
pointer
position
post
post_category
post_data
post_format
post_ID
post_id
post_mime_type
post_password
post_status
post_title
post_type
post_view
postid
posts
preview
primary_blog
private_key
ps
public_key
publish
pwd
query
reassign_user
reauth
redirect
redirect_to
ref
referredby
registration
registrationnotification
rememberme
remove-background
removeheader
removewidget
reset-background
resetheader
review
rich_editing
robots
role
s
same
save
savewidget
savewidgets
screen
scrollto
search
second
section
selectall
selection
send
send_password
sentence
short
show_sticky
sidebar
sidebars
signup_for
signup_form_id
site_id
site_name
sitename
size
skip-cropping
spam
spammed
src
ss
stage
start
static
status
sticky
subdomain_install
submit
subpost
subpost_id
super_admin
tab
tag
tag_ID
tag-name
tag_base
tags_input
tax
tax_input
tag-name
target
taxonomy
tb
term
text-color
the-widget-id
theme
theme_status
thumb
timezone_string
time_format
time_format_custom
title
thumbnail_id
trash
trashed
type
undismiss
unspam
unspammed
untrash
untrashed
url
update_home_url
updated
upgrade
upload_filetypes
upload_space_check_disabled
use_ssl
user
user_id
user_login
user_name
username
users
verify-delete
version
visibility
visible
w
weblog_title
welcome_email
welcome_user_email
widget_id
widget_number
widget-id
widget-recent-comments
widget-rss
width
withcomments
withoutcomments
wp_customize
wp_http_referer
wp_screen_options
wp-preview
WPLANG
x1
y1
year
变量名称
$method // Filter: \'user_contactmethods\'
$post_type_name . -tab
$sidebar_id . _position
$taxonomy_name . -tab
$whitelist_options // Filter: \'whitelist_options\'
__i__ . $something // used in widgets
new . $taxonomy->name
new . $taxonomy->name . _parent
quick-search-posttype- . $post_type_name
quick-search-taxonomy- . $taxonomy_name
widget- . $id_base
