Using Apache's rewrite technology

Use Apache's rewrite technology

URL redirection technology is required when doing PHP projects. The basic requirement is to redirect /user/heiyeluren to a URL such as /user.php?uid=heiyeluren. Of course, You can also redirect /article/200707291011.html to /article.php?id=200507291011 or the like. The simulation seems to be a static page, which can hide the real URL address, which is helpful for basic security precautions of rain boots, etc. So it seems that rewrite is a good solution.

To run rewrite in Apache, you must first install the mod_rewrite component, which is a mod_rewrite.c file, and then you must put mod_rewrite in ./configure to install it.
Generally, if you configure rewrite, you can configure it in httpd.conf, or you can define it in the .htaccess file in the current directory of the web page to decide which file to redirect to. In that case, it is very flexible and can also be suitable for virtualization. The host user does it.

Let’s look at an example of a .htaccess file:

1
2 RewriteEngine On
3 RewriteBase /
4 RewriteCond %{REQUEST_FILENAME} -f [OR]
5 RewriteCond %{REQUEST_F ILENAME } -d
6 RewriteRule ^.*$ - [S=42]
7
8 #RewriteRule ^share/$ /share.php [QSA,L]
9 RewriteRule ^tag/([^/]+)/? $ /user_tags.php?tag=$1 [QSA,L]
10 RewriteRule ^city/([^/]+)/?$ /user_city.php?tag=$1 [QSA,L]
11 #RewriteRule ^([ ^/]+)/day/([^/]+)/?$ /user_share.php?id=$1&s=1&selTime=$2 [QSA,L]
12 #RewriteRule ^([^/]+)/day /([^/]+)/?$ /user_share.php?id=$1&s=1&selTime=$2 [QSA,L]
13
14 RewriteRule ^([^/]+)/day/([^/] +)/?$ /user_share.php?id=$1&s=1&selTime=$2 [QSA,L]
15 RewriteRule ^([^/]+)/week/([^/]+)/?$ /user_share. php?id=$1&s=2&selTime=$2 [QSA,L]
16 RewRiteRule ^([^/]+)/month/([^/]+)/?$ /user_share.php?id=$1&s=3&selTime =$2 [QSA,L]
17
18 RewriteRule ^([^/]+)/day/?$ /user_share.php?id=$1&s=1 [QSA,L]
19 RewriteRule ^([^/] +)/week/?$ /user_share.php?id=$1&s=2 [QSA,L]
20 RewriteRule ^([^/]+)/month/?$ /user_share.php?id=$1&s=3 [QSA,L]
21
22 RewriteRule ^([^/]+)/?$ /user_share.php?id=$1 [QSA,L]
23

It’s relatively long. Let’s simply focus on the key content. The content between is the definition. RewriteEngine is to determine whether to run the URL rewriting function. RewriteBase is the basic path. The most important thing is the following RewriteRule, which is the rule we need to rewrite. , a regular expression compatible with Perl rules is applied here:

Text:
. Matches any single character
[chars] Matches the current character
[^chars] Does not match the current character
text1|text2 contains any text1 or text2 A

Quantifiers:
?                                                                                                                                                                                                                               having (text) Grouping of text
                                                                                    using ’s ’ s ’       ‐ ‐ ‐ to set the borders of an alternative or
                                                     Matching content start tag

$ Matching content ends Mark

Escaping:
char Used to escape special characters, including ".[]()" and other characters

The basic rules are as above, such as the following regular expression: ^/([^ /]+)/~([^/]+)/(.*)$ can match paths like /Language/~ Realname/.../File.

Then it is easier to understand the above content from this perspective. Let’s take a brief look at the rules of the RewriteRule directive:

RewriteRule The path to access The real path that needs to be pointed
This will be very clear. For example, if I want to redirect /user/heiyeluren to /user.php?uid=heiyeluren, then my rules It must be like this:

RewriteRule ^user/([^/]+)$ ^/user.php?uid=$2 [QSA,L]

By drawing inferences from one example, it is easy to understand how to write the rules, and you can also understand the above rules The content of the script is gone.​​

Nothing is clear, please refer to the attached link to learn more about the specific content. Please forgive me for the poor writing.

Attachment:
Apache Rewrite technology http://www.yujs.com/recommendation/004.htm
Apache module mod_rewrite http://linux.dalouis.com/doc/apache2.0/mod/mod_rewrite.html
URL Rewrite Guide http://linux.dalouis.com/doc/apache2.0/misc/rewriteguide.html
Apache HTTP Server 2.0 Version Documentation http://linux.dalouis.com/doc/apache2.0/