Found a total of 10000 related content
How to execute a DELETE query in php
Article Introduction：Use PDO or MySQLi preprocessing statement to safely delete database data: first connect to the database, write a DELETE statement with placeholder, bind the parameters and execute it, and check the number of affected rows to ensure the operation is successful, while preventing SQL injection.
2025-08-23
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260
Working with Databases in WordPress
Article Introduction：WordPress database interaction guide: mastering wpdb class and database operation skills
WordPress comes with a large number of database interaction functions. WP_Query class and wp_insert_post, update_post_meta, get_posts and other functions are usually enough to deal with most situations. However, especially when dealing with custom tables, we sometimes need to do things that cannot be achieved by WordPress native features.
This tutorial will explore the most important class in WordPress database interaction - wpdb, and share some development tips. We will introduce the dbDelta function used to create custom tables, but will not cover creating initial Word
2025-02-15
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432
Understanding Drupal's EntityFieldQuery
Article Introduction：Key Takeaways
EntityFieldQuery is a class in Drupal that allows developers to fetch information about entities from the database without having to write SQL queries, making it easier to retrieve, filter, and sort data. This is particularly useful
2025-02-22
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1188
How to create a ZIP archive in PHP?
Article Introduction：Create a ZIP file using ZipArchive class: instantiate the object, call the open() method to create the file, addFile() or addFromString() to add content, and finally call close() to save. 2. The entire folder can be added to the ZIP by traversing the directory. 3. Make sure to check the return value of open() and ensure write permissions. 4.PHP uses standard ZIP compression by default. Simple and reliable operation.
2025-08-30
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687
How to batch replace strings
Article Introduction：Navicat's batch replacement string function allows one-click replacement of specific strings in a large number of database records to improve management efficiency. Specific steps: connect to the database, open tables, write SQL statements (optional), or use a graphical interface; specify the target field, find/replace strings; click OK to complete the replacement. Be careful about backup, testing and operation with caution to avoid data loss.
2025-04-08
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709
How to connect PHP script to MySQL database
Article Introduction：In online form development, connecting PHP code with MySQL database is a common operation. User form data needs to be collected and added to the database. This article introduces two commonly used PHP and MySQL database connection methods.
PHP and MySQL database connection
To connect MySQL database to PHP, you need to install MySQL, database management tools and PHP on your computer. The two most commonly used connection methods are MySQLi and PDO.
First, we introduce the easier MySQLi to use.
First create a MySQL database, here we use TablePlus. TablePlus is a convenient database management tool that handles a variety of databases in a single interface. Through its user-friendly interface,
2025-04-11
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753
How do you write a testable PHP class? What is dependency mocking?
Article Introduction：AtestablePHPclassisonethatcanbeverifiedwithautomatedtestswithoutexternaldependenciesorglobalstate,achievedbyensuringsingleresponsibility,injectingdependencies,avoidingsideeffects,andhavingclearinputsandoutputs.2.Dependencymockingreplacesrealdependenc
2025-08-13
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873
Example of using Late Static Binding in PHP.
Article Introduction：Delayed static binding in PHP: flexible database queries
Lazy static binding (LSB) is a feature in PHP that allows a subclass to reference a static property or method of its parent class using the static keyword. This makes it possible to implement dynamic behavior in classes, which is especially useful in inheritance and subclass functionality customization. The core of delayed static binding lies in the use of the static keyword: when the PHP interpreter encounters the static attribute when compiling a function, it will delay determining its value until runtime. The value ultimately comes from the class that calls the function.
Application scenario: dynamic database query
Suppose you are developing a web application with a database. You have a Database base class that contains the methods for interacting with the database
2025-01-16
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850
How to build a SQL trigger
Article Introduction：SQL triggers are database objects that automatically perform operations when a specific event occurs. Create a trigger consists of the following steps: Select the trigger type: BEFORE, AFTER, or INSTEAD OF Specify the trigger event: INSERT, UPDATE, or DELETE Write the trigger code, specifying the operation to be performed to create the trigger using the CREATE TRIGGER statement.
2025-04-10
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757
Explain Laravel Database Migrations.
Article Introduction：Database migration is a version control tool in Laravel for managing database structure changes. It allows the use of PHP code to define and synchronize table structures to avoid manual operation of the database. 1. The migration file contains methods for up() to perform changes and down() rollback changes; 2. Use the Schema builder and Blueprint class to create tables and fields, and support common types and constraints; 3. Common Artisan commands include migrate run, rollback rollback, reset reset, refresh refresh, and make:migration to generate new files; 4. The recommended practice is to not modify the running migration, but create new files for adjustments, and fill data with factories and seeds.
2025-07-22
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741
How do I use the MVC (Model-View-Controller) architectural pattern in PHP?
Article Introduction：How to use MVC mode in PHP? 1. Set the basic file structure and create three folders: Model, View and Controller; 2. Write model processing logic, such as UserModel class operating database; 3. Create controller to receive requests and coordinate model and view, such as UserController obtaining data; 4. Build view display content, such as user_profile.php mixing HTML and PHP output dynamic data; 5. Unified request processing through the front-end controller index.php, loading the model and controller and executing corresponding methods to achieve application scalability.
2025-06-21
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798
Advanced customization of Python modules and classes: Exploring the template implementation of decorator and factory patterns
Article Introduction：This article discusses in-depth effective strategies for implementing code templates and advanced customization in Python. For the use scenarios of modules as "static classes", we introduced how to use class decorators to batch application functions and dynamically generate customizable class instances through class factory mode. These technologies provide developers with powerful tools to improve code reusability, flexibility and maintenance, and are especially suitable for scenarios where similar code structures are generated based on different configurations, such as database operation templates.
2025-08-23
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241
How Navicat batch modify digital data
Article Introduction：Navicat batch modification method: Use SQL statements: directly write UPDATE statements to modify. Use the query generator: graphical interface operation, suitable for users who are not familiar with SQL statements. Import and export combined with modification: suitable for a large number of complex modifications. Avoiding the pit: Backup the database. Small-scale test. Use transaction processing. Clear the conditional statement. Data type matching.
2025-04-08
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375
