PHP that ages well: WordPress, frameworks, and the production patterns that outlived the criticism.
How to add a custom sitemap to Yoast SEO so rewrite-driven pages with no WordPress post still get indexed: append a <sitemap> to the index with wpseo_sitemap_index, register a named sitemap, and generate its <url> entries.
How to add a custom rewrite rule in WordPress with add_rewrite_rule: the regex, the index.php query target, registering the query var so it actually populates, loading a template, and flushing once without flushing on every request.
Intercept requests that would 404 in WordPress on template_redirect, then resolve them to real content with status_header(200), 301 to the right URL with wp_safe_redirect(), or let them fall through. A fallback router for dynamic and legacy slugs you cannot enumerate.
How to build a custom product URL structure in WooCommerce: change or remove the /product/ and /shop/ bases from Settings > Permalinks, do it in code with a permalink filter plus add_rewrite_rule, and avoid the 404 collisions that come from a base-less product slug.
How to add a custom WordPress REST API endpoint with register_rest_route: the namespace convention, methods, the required permission_callback, args validation and sanitization, and returning WP_REST_Response or WP_Error.
Turn an ugly query-string URL like /?destination=paris&type=hotel into a clean /hotels/paris/ path: a multi-segment add_rewrite_rule, the query_vars filter, get_query_var, and a custom query.
How to build a dynamic Gutenberg block: render the front-end markup in PHP at request time with render_callback (or the block.json render property), return null from save, and preview it in the editor with ServerSideRender.
Keep API keys, database credentials, and SMTP secrets out of wp-config.php and out of git by loading them from a .env file with vlucas/phpdotenv, fed into define() where WordPress expects constants.
Render every call-to-action through one helper whose phone, label, URL, and visibility are all WordPress filters, so you change a CTA per context from a must-use plugin without touching the theme.
Install Google Tag Manager on WordPress with no plugin: the script in wp_head, the noscript iframe in wp_body_open (WP 5.2+), and the container ID stored once. The body snippet is the part people get wrong.
Embed a Google map in WordPress without tanking your load time: the free Maps Embed API iframe with loading="lazy", a te_map shortcode that escapes its output, an HTTP-referrer-locked API key, and a click-to-load consent pattern.
How to build three-level /make/model/year/ URLs in WordPress with add_rewrite_rule, custom query vars, and a vehicle CPT, plus the static-prefix collision that breaks the naive rule. Works the same on a catalog of brand/series/model or category/sub/sku.
WordPress only loads top-level PHP files in mu-plugins, with no activation hooks. Use a one-file loader that requires a Composer-autoloaded, PSR-4 namespaced plugin from a subdirectory.
How to override Rank Math's SEO title and meta description in PHP using the rank_math/frontend/title and rank_math/frontend/description filters, plus the canonical and Open Graph filters, with conditional per-context overrides for rewrite-driven pages.
Hooking pre_get_document_title does nothing once Yoast or Rank Math is active: the plugin owns the title and meta description tags. Here is which filter to hook for Yoast, Rank Math, and core, plus a portable helper that detects the active plugin.
Override Yoast SEO's title, meta description, canonical, and Open Graph/Twitter tags in PHP using the wpseo_title and wpseo_metadesc filters, with per-context conditionals for dynamic and rewrite-driven pages Yoast cannot edit in its UI.
How to make one fixed WordPress URL serve the content of a different page or post with no 301 redirect, so the address never changes. Uses add_rewrite_rule (or the request filter) plus the canonical handling you must not skip.
Read your own GA4 metrics server-side from WordPress: a Google Cloud service account, the google/analytics-data PHP client, a te_ga4_run_report() wrapper around runReport, plus caching and credential hygiene.
Drop the /docs/ section slug and serve a custom post type from the site root: the post_type_link filter to render the short URL, the add_rewrite_rule that resolves it, a 301 for old paths, and the collision caveat nobody warns you about.
How add_rewrite_endpoint() bolts a /reviews/ segment onto the end of an existing WordPress permalink, what the EP_* masks scope it to, and how to read the value without tripping the empty-string gotcha.
A diagnostic checklist for WordPress rewrite rules that won't fire: forgetting to flush, an unregistered query var, rule order, regex anchors, and how to inspect reality with wp rewrite list and parse_request.
Route WordPress email through SendGrid's SMTP relay with the phpmailer_init hook, keep the API key in wp-config.php, and stop transactional mail landing in spam.
How to build /service/city/ landing page URLs in WordPress with add_rewrite_rule and a custom template, plus the honest E-E-A-T warning about when this crosses into doorway pages Google penalizes.
Serve geographic URLs like /california/ and /california/los-angeles/ from the WordPress root: a location CPT, a state/city taxonomy, two add_rewrite_rule patterns mapping path segments to query vars, and pre_get_posts to load the right listings without thin pages.
Generate a WordPress table of contents from your post headings with no plugin: a the_content filter that injects heading ids, builds a nav of anchor links, scrolls smoothly with CSS, and caches the result in a transient.
Serve a fully working page at a URL with no post in the database: an add_rewrite_rule routed to a query var, rendered on template_redirect with status_header(200) so WordPress does not 404 it.
How to disable jQuery Migrate in WordPress: remove the jquery-migrate dependency on the front end so the compatibility shim stops loading, plus the testing step that tells you whether it is safe.
Two ways to inline CSS in WordPress: attach it to an enqueued handle with wp_add_inline_style, or echo a minified <style> block on wp_head. When inlining critical CSS helps, and when it just bloats every page.
How to remove the WordPress version number: drop the generator meta tag (and the version from feeds), why hiding it is housekeeping not security, and how to handle the ?ver= query string on core assets without breaking cache-busting.
How to dequeue the wp-block-library CSS in WordPress, and the one big caveat: do it only on a site whose front end uses no block markup, or you break your layout.
Editing a taxonomy term does not refresh the posts that cache term-derived data. Hook saved_term, re-save the attached posts, and bust the stale output, carefully and at scale.
What WordPress prints in wp_head by default, which tags and scripts are safe to remove, and one must-use plugin that strips the emoji, shortlink, feed, oEmbed, and version bloat in one place.
How to disable Dashicons on the WordPress front end: dequeue the dashicons stylesheet for logged-out visitors only, so the admin icon font stops loading on pages that never use it.
How to disable WordPress oEmbed: stop the discovery links, the wp-embed.js script, the oEmbed REST route, and the /embed/ URLs, while keeping the YouTube-style embeds you paste in posts working.
How to remove WordPress feed links from the head with remove_action, plus the deeper step most guides skip: killing the /feed/ rewrite rules and redirecting the URLs so they stop getting crawled.
How to remove the WordPress rel=shortlink: a small remove_action snippet that strips the <link rel='shortlink'> from the head and the matching Link: HTTP header.
How to disable WordPress emojis: a small functions.php snippet that strips the wp-emoji-release.min.js script, the inline detection JS, and the emoji styles from every page.
WordPress stuck on "Briefly unavailable for scheduled maintenance" means a .maintenance file got left behind by an interrupted update. Delete it and the site comes back.
Increase the PHP memory_limit via php.ini, .htaccess, ini_set(), the -d CLI flag, PHP-FPM pool config, or wp-config.php. Covers the modern PHP 8 defaults, the OPcache caveat, and the Composer/PHPUnit/WordPress out-of-memory patterns.
Drop empty, null, or false values from a PHP array with array_filter and the right callback. Includes the '0 gets removed' gotcha, the array_values re-index pattern, multidimensional cleanup, and a performance comparison.
How to install the Gearman PHP extension on Ubuntu 22.04 and 24.04 LTS for PHP 8.2, 8.3, and 8.4. Two install paths (apt and PECL), php.ini wiring, gearmand service setup, a working client/worker test, and when Gearman still makes sense vs Redis, RabbitMQ, and SQS.