Siksha Sarovar

Siksha Sarovar (sikshasarovar.com) is a free educational web application that helps students in India learn programming and prepare for academic and competitive exams. The platform offers structured coding courses (C, C++, Python, Java, HTML, CSS, PHP, Power BI, AI, Machine Learning, Data Science), complete university curriculum notes for BCA/MCA students with previous year question papers, Class 10 and Class 12 CBSE/HBSE school notes, and dedicated preparation material for SSC, UPSC, Banking, Railway and other government exams. Browsing the site is completely free and requires no account. Users may optionally sign in with Google solely to save their learning progress, quiz scores and personal preferences across devices.

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Siksha Sarovar
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Siksha Sarovar is a free e-learning platform for coding courses, BCA university notes and competitive exam preparation. Optional Google sign-in saves your learning progress across devices.

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Unit 4: Overview

Lesson 26 of 36 in the free Web Based Programming notes on Siksha Sarovar, written by Rohit Jangra.

Unit 4: PHP Database Connectivity

Unit 4 is the culmination of the WBP course — connecting PHP to a MySQL database. All modern web applications (e-commerce, social media, banking portals) use a database as their backbone. This unit teaches how to establish that connection and perform all essential data operations.

Why This Unit Matters

Dynamic web applications need to store and retrieve data. A standalone PHP script is limited to processing data that exists within the script itself. By connecting PHP with MySQL, web applications can store millions of user records, product listings, and transactions persistently.

Key Topics

#TopicCore Concept
1Databases & SQLRDBMS concepts, SQL command types (DDL, DML, DCL, TCL)
2PHP Database APIsMySQLi (OO + Procedural) vs PDO comparison
3Creating Database & TablesCREATE DATABASE, CREATE TABLE, data types, constraints
4Insert, Update & DeleteCRUD operations with PHP code
5Querying the DatabaseSELECT, fetch_assoc(), num_rows, error handling

Visual Overview

Above is the visual overview for Unit 4.