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How to update data using wpdb

In WordPress plug-in or theme development, the update() method of the wpdb class can be used to achieve database record updates. The basic structure is: $wpdb->update($table,$data,$where,$format,$where_format). 1.$table specifies the table name, such as $wpdb->prefix.'my_table'; 2.$data is an associative array, indicating the data to be updated, such as ['column1'=>'value1']; 3.$where is also an associative array, specifying the update conditions, such as ['id'=>123]; 4.$forma

Jul 18, 2025 am 01:13 AM

How to use Composer with WordPress

Using Composer to manage WordPress projects can improve dependency management and automatic loading efficiency, especially for multi-plug-ins, themes and custom development. 1. You can install WordPress core and plug-ins through johnpbloch/wordpress and wpackagist; 2. Use autoload configuration to realize automatic loading of namespace classes; 3. Use Composer to introduce third-party libraries such as Guzzle, and manually introduce vendor/autoload.php; 4. It is recommended to place vendor in the root directory and ignore Git commits; 5. Perform composerupdate carefully in the production environment. After adapting to this process, the project maintenance and

Jul 18, 2025 am 01:06 AM

How to use object caching in WordPress

PersistentobjectcachinginWordPressimprovessiteperformancebystoringfrequentlyaccesseddataforreuse.Itreducesdatabasequeriesandserverload,especiallyforsiteswithheavytrafficorlogged-inusers.Therearethreesetupmethods:usingRedis/Memcachedforbestperformance

Jul 18, 2025 am 12:32 AM

How to create a custom 404 page

Custom 404 pages improve user experience and reduce bounce rates, as default pages often lack navigation. Its functions include: 1. Provide navigation options such as homepage and popular pages; 2. Maintain brand consistency; 3. Increase user stay time. When creating, you should clearly inform the error status, provide jump buttons, search boxes and site map links, and maintain a simple style. Different platforms such as WordPress, Shopify or static websites can be set up in their own ways to ensure that users can still find the content they need smoothly even if they visit invalid pages, thereby maintaining the website image and usability.

Jul 18, 2025 am 12:07 AM

How to register a custom menu location in WordPress

ToregisteracustommenuinWordPress,usetheregister_nav_menus()functioninsideyourtheme’sfunctions.phpfile.First,defineoneormoremenulocationsusinganassociativearraywherekeysareinternalnames(slugs)andvaluesarehuman-readablenames.1.Hookthefunctioninto'after

Jul 17, 2025 am 12:34 AM

How to pass variables to JavaScript in WordPress

The most recommended way to pass variables to JavaScript in WordPress is to use wp_localize_script. First register or load the script, and then pass the data through wp_localize_script, for example pass ajax_url and nonce to the myData object in the front-end script. 1. Use wp_enqueue_script to register the script; 2. Prepare the data array to be passed; 3. Call wp_localize_script to complete the pass. For simple scenarios, you can also directly insert tags to define global variables, but be careful to avoid XSS vulnerabilities and reasonable selection of hooks. Both methods have applicable scenarios, and it is recommended to use them first.

Jul 17, 2025 am 12:20 AM

How to scan WordPress for malware

To scan WordPress websites for malware, you can follow the following steps: 1. Use security plug-ins (such as Wordfence, iThemesSecurity, or Sucuri) to scan the entire site to view suspicious files or accounts; 2. Check suspicious code in themes and plug-ins, especially base64 encoded or recently modified files; 3. Check abnormal files on the server through FTP, such as .php files in the uploads directory or suspicious files in the root directory; 4. Use phpMyAdmin to check whether there are malicious scripts, exception URLs or unknown administrator accounts in the database. When abnormalities are found, backup should be done first and then processed, and these checks should be performed regularly to ensure the security of the website.

Jul 17, 2025 am 12:18 AM

How to make a WordPress plugin translatable

To make the WordPress plug-in support multilingual, internationalization and localization are required. 1. Use translation functions such as __() and _e() to process text content. The former returns a string and the latter outputs directly; 2. Create a .pot file and generate .po and .mo files, scan the code through the tool to generate a translation template and corresponding language file; 3. Call load_plugin_textdomain() to load the language file to ensure the correct path; 4. Pay attention to details such as HTML attributes, dynamic content, text domain consistency and annotation instructions to ensure the translation effect.

Jul 17, 2025 am 12:16 AM

How to fix render blocking resources in WordPress

Rendering blocking resources will cause page loading to slow down. Solutions include: 1. Use tools such as PageSpeedInsights to identify blocking resources; 2. Delay loading non-critical CSS and JS, using defer or async attributes; 3. Merge and compress resources to reduce the number of requests; 4. Use cache plug-ins such as WPRocket to automatically optimize. Through the above steps, you can effectively improve the website speed and user experience and improve the SEO score.

Jul 16, 2025 am 01:12 AM

How to add a custom post type with a plugin

Using plug-ins is an easy way to add custom article types in WordPress. 1. Select plug-ins such as CustomPostTypeUI or Pods and install and activate them; 2. Create article types through CPTUI, set identifiers, names and functional options; 3. Optionally add taxonomy and bind to the corresponding article types; 4. You need to adjust the theme file or use the page builder to display content on the front end.

Jul 16, 2025 am 12:59 AM

How to enqueue scripts correctly in WordPress

Loading scripts correctly avoids conflicts, improves performance, and ensures loading on demand. Use the wp_enqueue_script function to uniformly manage loading order, path and dependencies to avoid duplicate loading and dependency confusion; the basic usage is to register and load scripts in functions.php through the wp_enqueue_scripts hook; advanced skills include using wp_register_script to separate registration and loading to control timing; precautions include using built-in libraries such as jQuery without repeated loading to ensure handle uniqueness; tips are to add async or defer attributes to scripts through filters to optimize loading methods.

Jul 16, 2025 am 12:52 AM

How to add a custom taxonomy with a plugin

Adding a custom taxonomy using plug-in ensures that the classification structure remains after topic switching and is easy to reuse. 1. Create plug-in folders and PHP files and add plug-in header information; 2. Write a registration taxonomy function, set tags and parameters and mount them to init actions; 3. Use taxonomy in the article editing interface after enabling the plug-in; 4. Get and display the classification through get_the_terms in the front desk; 5. Pay attention to refreshing the fixed link, unique naming, enabling debugging and keeping the plug-in lightweight.

Jul 16, 2025 am 12:42 AM

How to limit login attempts in WordPress

To limit the number of WordPress login attempts, use the plugin or manually add the code. 1. Use plug-ins such as LimitLoginAttemptsReloaded or WPLimitLoginAttempts to set the maximum number of failures (such as 5 times) and lock time (such as 30 minutes), and support IP whitelisting; 2. Manually add code to the theme functions.php file to achieve similar functions, but pay attention to backup and compatibility; 3. Combined with server-layer protection such as .htaccess, CDN rate limiting or fail2ban, further enhance security. These methods are simple to operate and can effectively prevent brute-force attacks.

Jul 15, 2025 am 12:28 AM

How to display posts based on custom field values

ToshowpostsbasedoncustomfieldvaluesinWordPresswithoutplugins,useWP_Querywithparameterslikemeta_key,meta_value,andmeta_query.1)Filterpostsbyspecifying'meta_key'and'meta_value'inqueryargumentstodisplaypostswithspecificcustomfieldvalues.2)Sortresultsusi

Jul 15, 2025 am 12:16 AM