Course Intermediate  11357

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  17659

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 Advanced  11371

Course Introduction："Brothers Band Front-end Example Display Video Tutorial" introduces examples of HTML5 and CSS3 technologies to everyone, so that everyone can become more proficient in using HTML5 and CSS3.

Course Introduction：This paper explores session hijacking in PHP, specifically the potential for users to alter their session identifiers. It differentiates between server-side and client-side sessions and highlights the vulnerability of session identifiers, which are t

2024-10-21 comment 0  847

Course Introduction：CSS Property Units: Optional for Zero ValuesCSS properties can be written with or without unit identifiers, such as "0" or "0px." While both...

2024-11-08 comment 0  663

Course Introduction：PHP identifier usage specifications: parsing the types of symbols allowed and their restrictions, specific code examples are required. PHP is a very popular server-side scripting language and is widely used in web development. In PHP, identifiers are names used to name entities such as variables, functions, and classes. However, there are some specifications that need to be followed when it comes to the use of PHP identifiers. This article will analyze in detail the types of symbols allowed in PHP and their limitations, and provide code examples to help readers better understand. 1. Legal PHP identifiers in PHP,

2024-01-11 comment 0  1261

Course Introduction：1. Concept identifiers are used to name variables, classes, methods, and packages. 2. Composed of letters, numbers, underscores, and dollar signs 3. Usage rules (1) Identifiers can be composed of letters, numbers, underscores (_), and dollar signs ($), but cannot contain other special characters such as @, %, spaces, etc. , cannot start with a number. For example: 123name is illegal (2) The identifier cannot be Java keywords and reserved words (keywords reserved by Java, which may be used as keywords in future upgraded versions), but can contain keywords and reserved words. For example: void cannot be used as an identifier, but Myvoid can (3) Identifiers are strictly case-sensitive. (4) The naming of identifiers should best reflect their functions.

2023-04-29 comment 0  1067

Course Introduction：Conditions for legal user identifiers: 1. It can only consist of letters (A to Z, a to z), numbers (0 to 9) and underscore "_", and the first character must be a letter or underscore, not a number. ;2. Keywords (reserved words) cannot be used in identifiers.

2021-06-28 comment 0  46998