style.css: CSS (style sheet) file
index.php: Home Templates
archive.php: Archive / Category Templates
404.php: Not Found error page template
comments.php: Message / Reply Template
footer.php: Footer Template
header.php: Header templates
sidebar.php: Sidebar template
page.php: content pages (Page) templates
single.php: page content (Post) template
searchform.php: template search form
search.php: search results template
Of course, specific to a particular section of a template, might have been more than these documents, but generally speaking, these documents are necessary for each template.

Tag to determine the basic conditions for
is_home (): whether to Home
is_single (): whether the content pages (Post)
is_page (): whether the content pages (Page)
is_category (): whether the Category / Archive Page
is_tag (): whether or not to Tag Archive pages
is_date (): whether the archive page for the specified date
is_year (): whether the archive page for the specified year
is_month (): whether or not to designate the month archive page
is_day (): whether or not for a specific day archive page
is_time (): whether the archive page for a specified period of time
is_archive (): whether or not to archive page
is_search (): whether the search results page
is_404 (): whether the “HTTP 404: Not Found” error page
is_paged (): Home / Category / Archive Page is a multi-page display
Header part of the PHP function used to
: blog name (Title)
: CSS file path
: PingBack Url
: template file path
: WordPress version
: Atom Url
: RSS 2.o Url
: blog Url
: the type of blog page Html
: blog page coding
: blog description
: page-specific content (Post / Page) of the title
PHP template commonly used functions and commands
: Call Header Template
: call Sidebar template
: call Footer Template
: display the contents of (Post / Page)
: check the existence of Post / Page
: If there Post / Page will be displayed
: While the end of
: If the end of
: show time, time format from “string” parameter determines the specific reference to PHP Manual
: the body of the message link. If you use comments_popup_script (), the message will open in a new window, on the contrary, in the current window
: page content (Post / Page) title
: page content (Post / Page) Url
: page-specific content (Post / Page) owned Category
: author
: page-specific content (Post / Page) ID
: If the user has to log in and have permission to show the Edit link
: display the link in the Blogroll
: Call Message / Reply Template
: Showing Page List
: display the list of Categories
: under an article link
: on an article link
: Calendar
: display the contents of archive
: navigation, display a / under the link to an article
: embedded in other documents, for customizable templates, or other type of document
Template associated with the other function
: output the corresponding information
: display the registration link
: show the logon / logoff link
: the content of the current page
: the content of the current cut-off in order to not be home / directory page displays the entire contents of
: page load time (seconds)
: page load queries