…It doesn't matter how experienced you become at…writing php or any other type of code.…When you come back to a script several…months later, the meaning won't always be obvious.…So it's useful to add comments to remind you what the code was for.…Comments are also a useful way of…disabling parts of a script when troubleshooting problems.…PHP has three different styles of comments.…Two of them are the same as in JavaScript, so let's deal with them first.…And to make it a little bit easier to see where the comments are, I'm going…to reorganize the script in this page so the PHP is on a beginning of a line.…
Just move that.…The first style of comment is anything between…two forward slashes and the end of the line.…Is treated as a comment and ignored by the php engine.…So, after this echo stringtoupper city I'm going to add a comment.…I type in two forward slashes.…And I'm using Dream Weaver as my editor.…You can see that it's already changed the color to orange.…That's syntax highlighting,…telling me that I'm actually doing a comment,…
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
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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: Adding comments to PHP scripts