The key to adding custom rewrite rules in WordPress is to use the add_rewrite_rule function and make sure the rules take effect correctly. 1. Use add_rewrite_rule to register the rule, the format is add_rewrite_rule($regex, $redirect, $after), where $regex is a regular expression matching URL, $redirect specifies the actual query, and $after controls the rule location; 2. You need to add custom query variables through add_filter; 3. After modification, the permalink settings must be refreshed; 4. It is recommended to place the rule in 'top' to avoid conflicts; 5. You can use plug-ins to view the current rules for easy debugging; 6. Common uses include custom article type alias, API path beautification, and multilingual routing.
Adding custom rewrite rules in WordPress is mainly to make your URLs more friendly, more SEO optimization requirements, or to implement specific routing logic. The key is to understand the usage of add_rewrite_rule
and ensure that the rules are refreshed correctly and take effect.
Understand the basic structure
WordPress rewrite system registers new rules through the add_rewrite_rule
function. Its basic format is as follows:
add_rewrite_rule($regex, $redirect, $after);
-
$regex
: matches the requested URL pattern (regular expression) -
$redirect
: The actual query or jump target to be executed (using$matches[]
to reference the previous match) -
$after
: where the rule is inserted, can be'top'
or'bottom'
, it is usually recommended to put it on top to match first
To give a simple example: If you want to convert /books/123
to /index.php?book_id=123
, you can write it like this:
add_rewrite_rule('^books/([0-9] )/?', 'index.php?book_id=$matches[1]', 'top');
Remember to register a custom query variable (query var) at the same time, such as adding it to functions.php
:
function add_book_query_vars($vars) { $vars[] = 'book_id'; return $vars; } add_filter('query_vars', 'add_book_query_vars');
FAQs and debugging tips
The rules are not in effect?
- No refreshing and rewriting rules : After each modification of the code, you must "refresh" the permalink settings page (go to the background "Settings → Permalink" and click to save)
- Rule order conflict : If your rule is placed in
'bottom'
, it may be captured in advance by the default rule. It is recommended to put'top'
first - The regular is written incorrectly : Check whether your regular matches the URL format you expect, especially slashes, numbers, character ranges, etc.
How to view the current rules?
You can view all currently registered rewrite rules through plug-ins (such as "Rewrite Rules Inspector") to facilitate troubleshooting or testing whether the conflict is effective.
Example of usage scenario
Here are several common custom rewrite requirements:
- Custom article type alias: For example, map
/product/123
to a single page of a custom article type - API interface path beautification: For example,
/api/v1/posts
actually calls a processing script - Multilingual or regional routing: For example
/zh-CN/page
to specific language version content
All of these can be achieved through add_rewrite_rule
query variable and template loading mechanism.
Basically that's it. As long as you pay attention to the order of rules, regular writing methods and refresh mechanism, it is not difficult to add custom rewrite rules, but it is easy to cause little negligence to not work.
The above is the detailed content of How to add custom rewrite rules. For more information, please follow other related articles on the PHP Chinese website!

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