PHP Beginner to Master

Set up a local php development environment, create a first php page embedded in html using php tags, run on localhost, and streamline coding with brackets and emmet plugin.

Learn how to declare and assign PHP variables using the dollar sign, and echo them with concatenation and the dot operator for strings and numbers.

Learn how to insert PHP comments, using single-line // and multi-line /* */ syntax, and why comments improve readability and maintainability across weeks of coding.

Explore basic math in PHP by echoing expressions and using variables to perform addition, subtraction, multiplication, and division with correct operator precedence and parentheses.

Define arrays in PHP to store multiple values in a single variable, including numbers and strings. Access specific elements by zero-based indices, and print contents with print_r for inspection.

Explore associative arrays in PHP by labeling values with keys, call them by key names like first_name, fetch values without memory of numeric indices, easing large datasets and database use.

Master conditional logic with if statements by testing conditions and executing actions based on true or false, using else and else if to handle multiple scenarios such as login pages.

Master switch statements in PHP by replacing many if statements with case blocks, using break to stop, handling multiple test values, and providing a default for unmatched cases.

Master how while loops control repetition in PHP with a zero-initialized counter and a less-than ten condition. Increment the counter, echo values, and prevent indefinite loops.

Explore PHP for loops, compare them with while loops, and learn to use a counter, initializer, and condition with increments, including break tags for output.

Master PHP functions by learning to call code across files, wrap logic in reusable functions, and organize arrays for scalable sites.

Discover how to add parameters to functions, pass values as arguments, and print results by calling the function with two numbers to compute their sum.

Learn how return values from functions save the computed result in a variable and enable reuse in other functions, instead of printing directly.

Understand global versus local variables: global ones are accessible everywhere; local ones exist only inside a function, and the global keyword enables accessing a global variable from within a function.

Learn how constants differ from variables, how to define a constant with the syntax, and why a defined constant cannot be changed afterward.

Discover built-in math functions in PHP, including power, random number generation within a range, square roots, and rounding methods such as round, floor, and rounding up or down.

Discover PHP array functions through practical code examples, using max, min, and sort to find the highest and lowest values and display the results in ascending order.

Explore pre-built string functions and shortcuts to uppercase, lowercase, replace text, and join strings, saving time without creating custom code.

Learn how to submit form data in PHP by setting the form action, using the post super global to capture input, and leveraging name attributes to print user data.

Extract and display user input from forms by using consistent name attributes to capture values like username and password, storing them in variables and printing them after submission.

Validate form input with if statements to prevent malicious data from compromising databases and user accounts. Check username length and uniqueness against an array of existing usernames.

Learn to split PHP form validation into an external file, connect front-end forms to a separate form process, and reuse a function page to centralize validation and logic.

learn how to access and create databases with phpmyadmin, including creating databases and tables, writing basic queries, and managing drops on localhost.

Create a database and a users table, define id as an auto-incrementing primary key with username and password columns, and practice inserting and browsing records.

Wrap the form in a centered bootstrap container and make it responsive. Submit to the same page via post data and echo the entered username and password.

Establish a database connection from the web page using localhost and root credentials, verify the connection, and prepare to insert entered data into the corresponding fields.

Connect your web page to a database and create user records by inserting username and password into the users table using an insert into query with form POST data.

Learn to read information from a database in PHP by selecting all data from the users table, looping through results, and printing them on a web page using arrays.

Learn to update user records in PHP using a single shared database connection, a form with an ID dropdown, and update actions for username and password.

Dynamically populate a form with user IDs by querying all users and displaying IDs in a select field, enabling updates to specific records.

Learn to use dynamic data in PHP by storing values in variables, pulling text, numbers, and images from other files, and echoing them across multiple pages from one source.

Refactor PHP code by extracting the select query into a functions file, using a global database connection, and reusing a show data function to read IDs from the users table.

Learn to build a SQL update query to change a user's username and password for a specific id, including the set clause and executing the update.

Learn to delete records from a database by adapting the update table function to a delete query, targeting the users table with where id = ID, and test the operation.

Refactor your PHP project by modularizing common components, moving header and footer into includes, and creating reusable functions for database queries to streamline maintenance.

Learn how SQL injections allow hackers to inject code into your database to steal or delete data, and prevent this with the escape string function for the username and password.

Learn how to fetch information from the web with PHP's $_GET superglobal, pass query string data, and store it in an array to drive actions on your site.

Discover how the post global variable pulls user data from a form submitted with the post method in PHP, retrieving fields like name while noting undefined index handling.

Explore how cookies in php track user activity, view and delete cookies in your browser, and manage long expiry dates, with a preview of setting cookies in the next lecture.

Set cookies in PHP using the built-in setcookie function with name, value, and expiration, and learn how browser-stored cookies enable personalized, targeted experiences.

Learn how to read cookies in PHP using the $_COOKIE super global, check if a cookie is set, retrieve its value, and handle the unset case.

Learn how sessions in PHP store user data on the server to track a user across pages, using session_start and the $_SESSION superglobal to welcome returning users.