Regular expressions (abbreviated regex) are terms that define a search pattern to focus on a specific part of a string for a specific purpose (e.g. to find/replace a word).

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Custom Post Type relationship with hierarchical parent and child permalinks

Trying to get my permalink and url structures to behave nicely. I have a Custom Post Type called Diseases. This post type is hierarchical with parent and child relationships. I have another CPT ...
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18 views

wordpress rewrite and keep url for page

I am using the rewrite api with the following that works... add_rewrite_rule( '^ch/(\d+)', 'index.php?p=$matches[1]', 'top' ); The idea is that the ch identifies it as Chinese and the ...
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1answer
15 views

How to fix old embeded iframes with WP-CLI search-replace

I want to change this: <iframe width="850" height="478" src="https://www.youtube.com/embed/4zH9Zca1vRM" frameborder="0" allowfullscreen></iframe> For this: ...
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23 views

How to ignore further page child path?

We are desperately looking for a way to create a page that accepts parameters, just like: example.com/mypage/?key=value but... without the ordinary query string. Instead, we wish to use the ...
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3answers
570 views

What is the structure of the “Featured Image” field in the DB?

On a WP install with about 1400 images and the Media Tools 1.1 plugin, I ran both "Import External and Set Featured Image" and "Set Featured Image". But the featured images functionality didnt work, ...
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29 views

How to unwrap/separate Html tags in pages?

I have around 300 pages with some of them having wrong HTML formatting that I have to fix. I want to: Separate the H1 tag from the inner tags. Moving the TITLE (found in span) to H1. Get rid of the ...
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1answer
32 views

Regex works in regexr, but not if I filter content [closed]

I want to filter the content of everypost and add classes to my links depending on certain conditions. At the moment I just want to filter all href attributes from the content and change them. ...
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1answer
17 views

Redirect Loop in Regex Moving to HTTPS

First, this site has been running on HTTPS for over 6 months with a green address bar and all. It was only recently I was reading on Bing Webmaster Tools that redirect loops were a problem on this ...
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16 views

Removed custom post type slug but not working for child pages

There are many discussions going about to handle child pages for custom post types were the custom post type slug has been removed. This results into an 404 because Wordpress can't match a valid ...
4
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1answer
87 views

Correct regex for wp_embed_register_handler

THE GOAL I'm trying to parse a url and convert it to an embedded video player in my post's content but I think my regEx is off or I'm not creating a provider correctly. THE CODE Here is what I have ...
2
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1answer
57 views

Get original image from thumbnail URL

I am using a method to find the first image included in a post's content to display as it's thumbnail (a little hacky, but it works). However, some authors add small sized images, and since this ...
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1answer
25 views

How can I reduce the number of rewrite rules?

I'm building a robust filtering system for my WordPress site, and I really want to have pretty permalinks for the resulting URLs. But because I'm offering a large amount of different filtering ...
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1answer
62 views

Using preg_replace() with the_content filter

I am trying to append a php query to the end of links from my website to a sponsor site using the_content filter and preg_replace(). I have tested my regex expression on regexr.com and it works also ...
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1answer
75 views

Rewrite rule to prettify two $_GET variables while in a new endpoint from a page

I'm trying to create a permalink rule which is a few levels deep. I have a basic page /page-slug/ - I'm appending to it a new endpoint: /page-slug/my-endpoint/ - from here I need to nest one id and ...
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1answer
69 views

Modify Image Source With The_Content Filter?

I'm very inexperienced with regex, however I'm trying to create a function that filters through the_content() and get_the_content() in order to modify the SRC of all images. The intended purpose ...
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1answer
46 views

RegExp to EXCLUDE strip HTML (FOR SOMME) comments

I'm using this function to remove HTML comments from my code to save loading time: // Remove unwanted HTML comments function remove_html_comments($content = '') { return ...
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19 views

Help with complex WP Regex express for .htaccess

I managed to do a proper regex redirect for one of our 10 year old sites which has gone through a series of pretty permalink changes over the years, but now having trouble sorting this out for two ...
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1answer
22 views

Can an RSS item be altered with a hook?

I would like to alter the content of each item in a site's RSS feed with a regular expression. The rss2_item hook is close but it is run just after the item has been output, so is only really useful ...
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3answers
5k views

How to make search include data from wp_postmeta?

I have a site using Advanced Custom Fields to create and store various bits of relevant info. These need to be included in the main general search, which by default only searches the title and main ...
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1answer
66 views

Adding regex filter to feedwordpress

I'm trying to write a plugin for Feedwordpress that filters html from the incoming feeds. So far I have managed to hook it to the right place, but the function completely wipes all content (and it ...
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0answers
57 views

Why is my script's regex having its backslash removed?

One of my company's child themes requires customization. I am customizing using jQuery and have noticed in my function's regex (function lives in the "scripts" section of "Pages"--->My Page) that ...
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1answer
97 views

Preg_Match(): compilation failed unknown property name

I'm having a problem with a wordpress theme I bought but their support is terrible. On every post page, I receive this error: Warning: preg_match(): Compilation failed: unknown property name after ...
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2answers
63 views

add_rewrite_rule isnt working, not getting added to rules array, why?

I'm trying to add a new rewrite rule but it doesn't seem to be getting added to the array and it certainly isn't working. I'm trying to get this URL, dult.dev/lists/games/destiny, to take me from a ...
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0answers
88 views

Correct regex for Nginx FastCGI cache?

https://codex.wordpress.org/Nginx#Nginx_fastcgi_cache currently has the following regex: # Don't cache uris containing the following segments if ($request_uri ~* ...
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1answer
179 views

Get shortcode attribute outside of Wordpress

Is there a clean way to get a shortcode's attribute value outside of Wordpress's default behaviour? I am working on a single script outside a Wordpress installation, where I only do ...
2
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5answers
3k views

rewrite rules and querystring

When I go to the url mysite.com/photos/120 I'm wanting to get the 120 out. In the PHP I want to be able to grab these "parameters" like the url was mysite.com?page=photos&id=120 or even just ...
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30 views

How to rediect old canonical links to new

I recently noticed wordpress 4.x is not redirecting old canonical links to the new format and gives a 404 error in crawl and where ever referenced. I have checked this Yoast to get some help on the ...
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1answer
42 views

How can I globally italicize certain text?

I have a large WordPress site, and I want to take a certain text phrase and italicize all instances of that phrase, for all pages. Does anyone know of a plugin that can do this? Particularly, for ...
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1answer
101 views

Shortcode and whitespace formatting problem

I'm having a problem with shortcodes on a website, currently you enter a shortcode in the post edit screen like the following: [tab name=Itinerary] This will output a tab such as: However as ...
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489 views

Compare meta_query with a Regular Expression and do a less-than operation on it

I have the problem that my client is using a theme which stores options of items in a serialized way in the post_meta table. I already found out that this is not the best way to save values ...
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1answer
1k views

Extract attribute values from every shortcode in post

I have multiple shortcodes in the post: [section title="first"] [section title="second"] [section title="third"] I want to extract all title values (i.e first, second, third) from external ...
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60 views

Regex replace on the fly

Heres the example content on all my post <img width="550" height="486" src="http://www.xyz.com/wp-content/uploads/2014/12/-550x550-550x486.jpg" /> <img width="760" height="486" ...
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1answer
675 views

Getting shortcode attribute values and shortcode content with JavaScript regex

This is an example shortcode: [boutique_banner title="Loyalty Program:" link="More" linkhref="/"]Earn 1 point for every $5 spent[/boutique_banner] I have created a custom mce view to display this ...
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1answer
407 views

How to dequeue a stylesheet by src, not handle?

I'm trying to develop a Wordpress plugin that will dequeue/deregister Font Awesome stylesheets added to a theme by certain plugins that users may install, if the theme already make use of Font ...
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1answer
175 views

Wrapping shortcodes in another shortcode

I'd like to wrap existing shortcodes in post content inside a new shortcode that I'm adding to my plugin. The existing content looks like this: Some text - could be <span>HTML</span> or ...
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1answer
229 views

Why won't my preg_replace work with content_save_pre?

I've written a filter function to replace all image URLs in a post with URL from the Uploads directory of my site. However, when using the content_save_pre, filter it won't actually work - but if I ...
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1answer
199 views

Custom rewrite_rules - only pass numbers and not alphabetic characters

I'm trying to add a rewrite rule to pass a var to a custom page template. For some weird reason it only excepts numbers in the variables, when I type in characters other then number it directs to ...
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0answers
98 views

Add class to all parent elements inside the_content

Is there a way to add a class to all parent elements inside the_content? My problem is I'm using this kind of css selector: .post_content>* {margin-bottom:10px;} This is to due with mostly ...
4
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3answers
1k views

Nested Shortcode Detection

If you are familiar with this code <?php $pattern = get_shortcode_regex(); preg_match('/'.$pattern.'/s', $posts[0]->post_content, $matches); if (is_array($matches) && $matches[2] ...
2
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1answer
517 views

Allowing shortcodes inside attributes

I want to do a Wikipedia-like infobox for some articles on a WP site. I guess the most logical thing to do it is to use a custom shortcode—one that returns a table-like markup with a fixed order of ...
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1answer
690 views

Adding elements to wp_list_pages (within <li>, but before <a>)

I'm working on my first wordpress theme and I'm running into some trouble. I'd like to add an extra div (which I'll style in css) within each <li>, but before the actual <a ... > element ...
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2answers
72 views

How to handle a post before publishing?

I want to do a regex match to each post before it gets published, and if the regex fails to match, delete the post entirely, what hook should I use?
0
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1answer
53 views

regEx wp core file

I have an issue with the way WordPress handles creating a page anchor. The page anchor button is already defined in the WordPress TinyMCE code.. and can be added using either the Ultimate Tinymce or ...
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3answers
119 views

Why isn't my rewrite rule working when there is no second parameter?

Here is my rewrite rule code: add_rewrite_rule('tides/([^/]+)/([^/]*)', 'index.php?page_id=4348&location=$matches[1]&month=$matches[2]', 'top'); add_rewrite_tag('%location%', '([^&]+)'); ...
1
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1answer
56 views

Grab Wordpress Salt Data From URL

I'm looking to grab only the values of the Wordpress salt information from this URL with PHP: https://api.wordpress.org/secret-key/1.1/salt I want to target the second set of values within single ...
0
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1answer
339 views

Rewrite Rule & Regex - Extract 'cat-name' and 'page-number' from http://domain.com/custom-post-type/category/cat-name/page/page-number

I have an URL formatted so: http://domain.com/custom-post-type/category/cat-name/page/page-number I need to extract: cat-name and page-number So that in my functions.php, I can create the custom ...
1
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1answer
2k views

Wordpress returns 404 on custom rewrite rule conflict in parameters

I have been following the steps on the answer here and it worked wonders. But my problem is on this part, on the original: add_filter('rewrite_rules_array', 'mmp_rewrite_rules'); function ...
2
votes
1answer
231 views

Regex in add_rewrite_tag not accepting OR operators?

I am trying to add a custom field to the post permalinks by using a combo of add_rewrite_tag and applying a post_link filter. What I am aiming for is something like this: ...
0
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1answer
233 views

Delete/replace img tags in post content for auto published posts [closed]

In my blog I have set up auto-publish for posts and I get 5 thousands new posts every day, in this moment I have more than 150 thousand posts. I need a script, or a plugin, or a function to connect ...
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votes
1answer
246 views

Regex For Extracting First 4 letters of search term

I am using a redirection plugin and want to redirect the existing search url http://www.example.com/search/abcdef to http://www.example.com/?s=abcd I am able to redirect /search/abcdef to /?s=abcdef ...