custom post types - How do I know if a rewritten rule was applied?|Programmer puzzle solving

I defined a custom post type with rewrite rule:

    register_post_type('balls', [
        'labels' => [
            'name' => 'balls',
            'singular_name' => 'balls',
            'add_new' => 'new',
            'add_new_item' => 'new',
            'parent_item_colon' => ''
        ],
        'taxonomies' => ['category'],
        'menu_position' => 4,
        'public' => true,
        'query_var' => true,
        'capability_type' => 'post',
        'supports' => ['title', 'editor', 'thumbnail'],
        'rewrite' => [
            'slug' => 'ballinfo'
        ]
    ]);

now how do I know if a site was called with /ballinfo or not? How do I know if my rewrite rule was matched and used?

I defined a custom post type with rewrite rule:

    register_post_type('balls', [
        'labels' => [
            'name' => 'balls',
            'singular_name' => 'balls',
            'add_new' => 'new',
            'add_new_item' => 'new',
            'parent_item_colon' => ''
        ],
        'taxonomies' => ['category'],
        'menu_position' => 4,
        'public' => true,
        'query_var' => true,
        'capability_type' => 'post',
        'supports' => ['title', 'editor', 'thumbnail'],
        'rewrite' => [
            'slug' => 'ballinfo'
        ]
    ]);

now how do I know if a site was called with /ballinfo or not? How do I know if my rewrite rule was matched and used?

Share Improve this question asked Oct 27, 2018 at 14:03 John Smith 1036 bronze badges

1 Go to wp-admin/edit.php?post_type=balls and mouseover the "View" link of any post, and see if the permalink has /ballinfo/{slug}. If yes, the rewrite rule is being applied. Then visit the permalink and if you see the proper post/content, the rewrite rule works properly. If not, visit the permalink settings page to flush the rewrite rules. – Sally CJ Commented Oct 27, 2018 at 15:09
1 If you meant by programmatically, you can get the rewrite rule that matches the requested URL via WP::$matched_rule. – Sally CJ Commented Oct 27, 2018 at 15:33
1 Use either global $wp; echo $wp->matched_rule; or echo $GLOBALS['wp']->matched_rule; – Sally CJ Commented Oct 27, 2018 at 16:14
1 There's probably an API function to accomplish what you are trying to do, like is_singular( 'balls' );, but you have not described the problem you are trying to solve or given any details, like where and when you are trying to do this. – Milo Commented Oct 27, 2018 at 16:23
1 @JohnSmith, check my answer. – Sally CJ Commented Oct 28, 2018 at 7:13

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1 Answer 1

Sorted by: Reset to default 1

I'm not very sure of what you're trying to achieve, but I hope this answer can help. :)

With the way your custom post type is being registered, WordPress will create custom rewrite rules such as below for the CPT's single post pages:
```
RegEx: ballinfo/([^/]+)(?:/([0-9]+))?/?$
Query: index.php?balls=$matches[1]&page=$matches[2]
```
So for the following question:

how do I know if a site was called with /ballinfo or not

When the single page of a balls post is visited, the URL would have /ballinfo/ as in example/ballinfo/an-example-balls-post.

Now to programmatically check if the URL contains /ballinfo/, you can check if the $request property of the global WP class instance starts with a ballinfo/ like so:
```
global $wp;
if ( preg_match( '#^ballinfo/#', $wp->request ) ) {
    echo 'Site was called with the /ballinfo<br>';
}
echo '$wp->request is ' . $wp->request . '<br>';
```
And for the following question:

How do I know if my rewrite rule was matched and used?

You can match the rule (RegEx) with the one in the $matched_rule property of the global WP class instance.

For example, for the single balls post pages, where the rule uses the RegEx pattern as in point #1 in this answer, try this:
```
global $wp;
if ( 'ballinfo/([^/]+)(?:/([0-9]+))?/?$' === $wp->matched_rule ) {
    echo 'Yay, my rewrite rule was matched!<br>';
} else {
    echo 'Not matched. $wp->matched_rule is ' . $wp->matched_rule . '<br>';
}
```

And you may already know this, but if you just wanted to check if the requested URL is for a CPT post/archive/etc., you can use is_singular(), is_post_type_archive(), and other appropriate WordPress conditional functions/tags.

Programmer puzzle solving

custom post types - How do I know if a rewritten rule was applied?

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