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How to write unit tests for WordPress code

Writing WordPress unit tests requires using PHPUnit and WordPress test suites. 1. Set up the environment: Install PHP and Composer, install PHPUnit through Composer, clone the wordpress-develop repository, configure a dedicated database, and use wpscaffold to generate test files. 2. Understand the test structure: inherit the WP_UnitTestCase class, the test method starts with test_, and use the factory class to create test data to avoid real HTTP requests. 3. Write effective tests: cover normal and boundary situations, verify function behavior, hook triggers, and shortcode output, keep the test independent and focused. 4. Run and debug:

Jul 25, 2025 am 12:32 AM

How to safely update WordPress plugins

Update WordPress plug-ins with caution to avoid website crashes or data loss. 1. First back up the entire website, including files and databases. You can use plug-ins such as UpdraftPlus or BackupBuddy or one-click backup functions of hosting service providers; 2. Check plug-in compatibility, pay attention to "LastUpdated" time, user feedback, and give priority to verification in the test environment; 3. Only update one plug-in at a time, confirm that there is no exception before continuing to the next one; 4. If the theme integration or custom modification is involved, it should be updated in the sub-theme or test environment to ensure security before deploying to the official environment.

Jul 25, 2025 am 12:31 AM

How to understand WordPress rewrite rules

WordPress's rewrite rules are URL rewrite configurations on the server, used to convert beautiful URLs into actual requests. Its working mechanism is to convert addresses like /about into real requests such as index.php?pagename=about through Apache or Nginx modules. 1.WordPress automatically generates rules when saving a permalink, and creates regular expressions to match URLs according to the article type and structure; 2. Rules can be refreshed manually through flush_rewrite_rules(), but they should only be used if necessary, such as plug-in activation; 3. If a permalink error occurs, check whether the server enables mod_rewrite and exists.

Jul 25, 2025 am 12:25 AM

How to display posts from specific categories

If you want to display only specific categories of articles on the website, you can implement them in different ways: 1. WordPress users can use built-in article blocks, plug-ins or widgets to filter categories and customize styles; 2. Developers can realize classification display through database queries, API interfaces and JavaScript dynamic filtering on the front and back ends, and pay attention to security protection; 3. Static site generators such as Jekyll and Hugo can process classification pages in the construction stage through preset classification mechanisms, without database support, and loading speed is fast. The selection method depends on the platform and technical level used.

Jul 24, 2025 am 12:47 AM

How to debug a blank white screen in WordPress

When a WordPress page displays a blank white screen, it is usually a program error but no error message is displayed. The solution includes troubleshooting plug-ins, themes, and server configuration. 1. Check for recent actions such as installing plug-ins, replacing themes, or updating failed, try disabling new plug-ins or switching back to the default theme. 2. Turn on debug mode, set WP_DEBUG to true in the wp-config.php file, and record the error log to locate the problem. 3. Increase PHP memory limit and increase memory through define('WP_MEMORY_LIMIT','256M') to avoid crashes due to insufficient resources. 4. Clear the cache and check the server status, clean the browser, plug-in or CDN cache, and view the server

Jul 24, 2025 am 12:36 AM

How to use Redis with WordPress

The main purpose of using Redis to pair WordPress is to improve website access speed and performance. The core is to reduce database pressure and speed up response time through Redis as a cache layer. The specific implementation is divided into three steps: First, install the Redis service and ensure it is running normally, including installing on the server, starting the service, setting up the power-on and configuring network access rights; Second, enable Redis cache in WordPress through the RedisObjectCache plug-in. After installing the plug-in, connect and set the connection according to the actual address, port and password of the Redis service, and enable the object cache function; Third, optimize the settings according to the needs, including confirming that PHP has installed Redis extensions and selecting appropriate ones.

Jul 24, 2025 am 12:33 AM

How to handle external API calls securely

To securely call external APIs, you need to start from three aspects: access control, data protection and response verification. ① Use APIKey, OAuthToken or JWT and store the key in environment variables or key management services, and rotate regularly; avoid the front-end exposing the key, select OAuth2.0 and adopt the appropriate authorization mode. ② Verify the structure and content of the data returned by the interface, confirm the Content-Type and field types, check the status code, filter the XSS content, and set a reasonable timeout time. ③ Use token bucket or leak bucket algorithm to achieve current limiting, record user API usage, and reduce duplicate requests in combination with cache to prevent triggering the other party from limiting the current or blocking the IP.

Jul 24, 2025 am 12:07 AM

How to implement browser caching in WordPress

ToenablebrowsercachinginWordPress,useapluginoreditserverfiles.1.Checkyourcurrentsetupviahostingdashboard,cachingplugins,ortoolslikeGTmetrix.2.UseapluginlikeWPSuperCacheorW3TotalCachebyinstalling,configuringcontenttypesandexpirationtimes,andpurgingcac

Jul 23, 2025 am 12:53 AM

How to troubleshoot theme issues in WordPress

When you discover a WordPress theme problem, first confirm whether it is a real theme failure. 1. Switch the default theme test. If the problem disappears, there will be problems with the original theme, otherwise check the plug-in or server; 2. Turn on debugging mode to view the error log and locate specific code problems; 3. Update the theme and plug-in to the latest version, and use sub-themes to avoid overwriting; 4. Re-download the original theme file to replace the possible damaged parts, especially the core template files.

Jul 23, 2025 am 12:18 AM

How to optimize large WordPress sites

Optimizing large WordPress websites requires starting from four aspects: database, caching, image management and plug-in control. 1. Database optimization: Regularly clean redundant data, use cache, split table structure and optimize indexes to improve query efficiency; 2. Efficient caching strategy: combine page cache, object cache and CDN acceleration to reasonably set cache expiration time; 3. Image management: compress pictures, adopt WebP format, enable delayed loading, and consider external storage to reduce server pressure; 4. Plug-in control: streamline the number of plug-ins, select high-quality plug-ins, and regularly evaluate performance impact, and use code to replace plug-in functions if necessary.

Jul 23, 2025 am 12:18 AM

How to change the WordPress login URL

Modifying the WordPress login URL can improve website security. 1. The default login address such as /wp-login.php is susceptible to automation attacks, which can reduce risks after changing; 2. The manual method involves renaming wp-login.php and creating redirect files, but may be overwritten when updated; 3. It is recommended to use plug-ins such as WPSHideLogin, iThemesSecurity, etc. to be safer and more convenient; 4. After modification, you need to record the new address, clear the cache, check the security plug-in settings, and test the login function. This measure should be used in conjunction with other safety measures for optimal results.

Jul 23, 2025 am 12:07 AM

How to use the RichText component in Gutenberg

Gutenberg's RichText component is the core tool for creating editable text areas, suitable for editing of titles, paragraphs, etc. 1. The basic usage is to introduce RichText and pass in value and onChange attributes to save content; 2. Turn on rich text formats such as bold, italic, and links through formattingControls; 3. Multiple text areas can be managed by binding different attribute fields separately; 4. Notes include clarifying tagName, loading CSS, avoiding nesting, and using placeholder to improve the experience. Mastering these key points can help to develop custom blocks efficiently.

Jul 22, 2025 am 12:40 AM

How to use the WordPress Heartbeat API

WordPress's Heartbeat API is used to implement regular communication between the browser and the server. 1. Initialize Heartbeat requests to customize the frequency and data through wp_enqueue_script and JavaScript, listen to the heartbeat_send event to add custom data and set window.heartbeatInterval adjustment interval; 2. Receive data through the heartbeat_received filter on the PHP side, use the callback function to process and return the response; 3. Avoid performance problems, set reasonable intervals, avoid complex operations, and disable Heartbeat on unwanted pages. Rational use of H

Jul 22, 2025 am 12:32 AM

How to use reverse proxy with WordPress

Use reverse proxy to pair with WordPress to improve performance, security and load balancing. Common uses include caching static resources, SSL termination, hiding real IP from outside, and centrally managing multiple sites; when configuring Nginx as a reverse proxy, you need to set proxy_pass and related headers, and ensure that the site address of the WordPress backend is consistent with the proxy domain name; common problems such as background jump errors, unsafe HTTPS display, and failed comment login can be solved by defining WP_HOME, WP_SITEURL and identifying HTTP_X_FORWARDED_PROTO; if necessary, installing ReverseProxyVIP or Cloudflare compatible plug-in can be optimized.

Jul 22, 2025 am 12:10 AM