Course Elementary  3486

Course Introduction：Promise is the most important and difficult technology in ES6. Interviews with medium and large companies will ask about the implementation of front-end Promise. This video tutorial starts from the most basic callback/exception syntax, to the basic use of Promise; from technical analysis of Promise difficulties, to step-by-step handwritten Promise implementation, extended async and await in-depth analysis, macro queue and micro queue detailed explanation; and finally through Classic interview questions to test the effect of Promise learning. After passing the level, you will become a Promise senior engineer.

Course Intermediate  11459

Course Introduction："Self-study IT Network Linux Load Balancing Video Tutorial" mainly implements Linux load balancing by performing script operations on web, lvs and Linux under nagin.

Course Advanced  17742

Course Introduction："Shangxuetang MySQL Video Tutorial" introduces you to the process from installing to using the MySQL database, and introduces the specific operations of each link in detail.

Course Introduction：The difference between custom PHP functions and predefined functions is: Scope: Custom functions are limited to the scope of their definition, while predefined functions are accessible throughout the script. How to define: Custom functions are defined using the function keyword, while predefined functions are defined by the PHP kernel. Parameter passing: Custom functions receive parameters, while predefined functions may not require parameters. Extensibility: Custom functions can be created as needed, while predefined functions are built-in and cannot be modified.

2024-04-22 comment 0  814

Course Introduction：Customizing a PHP function involves the following steps: Declare the function using the function keyword. Specify the function name. Define parameters (optional). Use the return statement to return data (optional). Call functions.

2024-04-10 comment 0  940

Course Introduction：There are two ways to reuse PHP custom functions: 1. Include function files; 2. Automatically load functions. Inclusion method: Define the function in a separate file and then include the file where needed. Automatic loading method: Use PHP's SPLAutoload mechanism to automatically load custom functions. Example: Format date function, inclusion method: define the function in the functions.php file, and include the file in the main.php file; automatic loading method: define the function in the format_date.php file, in the main.php file Register the autoloading function to automatically load the format_date.php file.

2024-04-16 comment 0  729

Course Introduction：PHP execution functions follow a specific order: 1. Predefined functions (highest priority); 2. User-defined functions (in order of declaration). Predefined functions take precedence over custom functions, for example, echo() is executed before myFunction().

2024-04-17 comment 0  1070

Course Introduction：How to create a custom PHP function? Define function name and parameters (optional). Use curly braces to write the function body. Use the return statement to return the result (optional).

2024-04-10 comment 0  446