PHP Notes

PHP Notes computer science 

Unit I: Introduction to PHP

• - Origin and advantages of PHP  
• - How PHP works with web servers  
• - Installation and hardware/software requirements  
• - Strengths and weaknesses of PHP  
• - Basic PHP development (syntax, variables, data types, operators)  

Unit II: Arrays and Loops

• - Single-dimensional arrays  

• - Multi-dimensional arrays  
• - Associative arrays  
• - Looping through arrays  
• - Sorting arrays  

Unit III: File Handling and Forms

• - Creating, reading, writing, deleting files  
• - Working with directories  
• - Checking file existence and size  
• - Handling forms and user input  
• - Using superglobal variables in PHP  

Unit IV: Object-Oriented Programming and Databases

• - Classes, objects, properties, and methods  
• - Constructors and destructors  
• - Inheritance and abstract classes  
• - Connecting to MySQL database  
• - CRUD operations (Create, Read, Update, Delete)  

Unit V: Sessions, Cookies, and Advanced Topics

• - Working with sessions and cookies  
• - Passing session IDs, encoding/decoding session variables  
• - File upload and download  
• - Environment variables in PHP  
• - Introduction to AJAX and XML