Course Introduction：Joining Tables with ssp.class.phpDataTables Table plug-in for jQuery provides a convenient way to display data in tabular format. However, it does...
2024-11-15 comment 0 1200
Course Introduction：Orphanedpostmeta is metadata that has not been cleaned after articles in WordPress are deleted, they occupy database space and affect performance. Orphan data will be generated when the post_id in the postmeta table is manually deleted, plug-in operation is improper, or data migration causes the post_id in the postmeta table to not exist in the posts table. The inspection method includes running SQL queries or scanning with plug-in. The deletion method includes manually executing SQL commands or cleaning them with one-click through plug-ins such as WPOptimize and AdvancedDatabaseCleaner. It is recommended to reduce orphan data generation by deleting articles in the background, using reliable plug-ins, and regularly cleaning, and automatic cleaning tasks can be set up to maintain database efficiency.
2025-08-14 comment 0 633
Course Introduction：WordPress editing dates can be canceled in three ways: 1. Install the Enable Post Date Disable plug-in; 2. Add code in the functions.php file; 3. Manually edit the post_modified column in the wp_posts table.
2025-04-20 comment 0 717
Course Introduction：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.
2025-07-23 comment 0 129
Course Introduction：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
2025-07-18 comment 0 353
Course Elementary 13845
Course Introduction：Scala Tutorial Scala is a multi-paradigm programming language, designed to integrate various features of object-oriented programming and functional programming.
Course Elementary 82397
Course Introduction："CSS Online Manual" is the official CSS online reference manual. This CSS online development manual contains various CSS properties, definitions, usage methods, example operations, etc. It is an indispensable online query manual for WEB programming learners and developers! CSS: Cascading Style Sheets (English full name: Cascading Style Sheets) is an application used to express HTML (Standard Universal Markup Language).
Course Elementary 13194
Course Introduction：SVG is a markup language for vector graphics in HTML5. It maintains powerful drawing capabilities and at the same time has a very high-end interface to operate graphics by directly operating Dom nodes. This "SVG Tutorial" is intended to allow students to master the SVG language and some of its corresponding APIs, combined with the knowledge of 2D drawing, so that students can render and control complex graphics on the page.
Course Elementary 24651
Course Introduction：In the "AngularJS Chinese Reference Manual", AngularJS extends HTML with new attributes and expressions. AngularJS can build a single page application (SPAs: Single Page Applications). AngularJS is very easy to learn.
Course Elementary 27503
Course Introduction：Go is a new language, a concurrent, garbage-collected, fast-compiled language. It can compile a large Go program in a few seconds on a single computer. Go provides a model for software construction that makes dependency analysis easier and avoids most C-style include files and library headers. Go is a statically typed language, and its type system has no hierarchy. Therefore users do not need to spend time defining relationships between types, which feels more lightweight than typical object-oriented languages. Go is a completely garbage-collected language and provides basic support for concurrent execution and communication. By its design, Go is intended to provide a method for constructing system software on multi-core machines.
2021-10-29 15:44:36 0 2 967
2017-06-26 10:55:14 0 2 1064
javascript - Is there any table plug-in that supports double-layer headers?
2017-05-19 10:47:11 0 1 662
php - Wordpress mysql data recovery problem, novice please help!
2017-07-07 10:35:20 0 3 1408
How to export and print the values ??in the echarts chart to Excel? Is there any plug-in required?
2018-04-28 14:38:00 0 1 1430
