…PHP variables can store many different types of information.…For the time being, let's just focus on…how you store numbers and text in a variable.…We'll also look at the important role the semicolon plays in PHP.…This page, variables.php, contains a simple…template for a webpage about a book.…I'm going to add my PHP code above the doc…type, so if I put my insertion point up there,…add in a couple of extra lines, then an opening PHP tag.…Open angled bracket, question mark, PHP.…
And down here a closing tag which is a question mark and a closing angle bracket.…It might seem strange to you that I'm putting the PHP code above the doc type.…But remember, PHP code is processed by the server, and that's where it stays.…So as long as the PHP code doesn't output…any HTML, it's okay.…Above the doc type, that will remain at the…top of the page when it's received by the browser.…So let's add our first variable. This one will be a number.…
We'll call it answer.…Variables always begin with a dollar sign, so $, answer, then an equal sign.…
Author
Released
12/9/2013Note: This course was recorded with Adobe Dreamweaver, but you can use the code editor of your choice to follow along.
- How to use PHP in a webpage
- Storing and displaying text and numbers in variables
- Using functions
- Adding comments to your PHP scripts
- Moving common page elements to include files
- Displaying different content on a page
- Working with multiple values in arrays and loops
- Getting form input sent by the POST method
- Using PHP sessions to preserve data
- Storing data in session variables
- Connecting to and querying a database
- Handling errors
Skill Level Beginner
Duration
Views
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Introduction
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Welcome1m 30s
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Using the exercise files5m 13s
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1. Introduction to PHP
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How to use PHP in a web page6m 43s
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2. Using Server-Side Includes for Common Page Elements
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3. Using Conditions to Change Page Output
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How PHP makes decisions3m 30s
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4. Working with Multiple Values in Arrays and Loops
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Labeling array elements7m 21s
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5. Getting User Input from a Form
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Calculating the order total6m 34s
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6. Displaying Content from a Database
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Loading data into MySQL5m 37s
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Connecting to the database7m 47s
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Querying the database6m 15s
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Linking to a details page2m 40s
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7. Handling Errors
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Dealing with PHP errors4m 15s
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Tracking down parse errors4m 32s
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Conclusion
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What's next?2m 26s
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Video: Storing numbers and text in variables