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NULL and empty: PHP with MySQL Essential Training
NULL and empty: PHP with MySQL Essential Training

In PHP, NULL refers to the lack of having a value. There are differences between setting a variable as NULL or setting a variable as an empty string. The PHP function empty cannot differentiate between similar variables such as NULL, false, and 0. This is a leading cause of bugs for coders. Learn about using NULL and empty correctly in this PHP with MySQL tutorial.

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Skill Level Beginner
14h 32m
Duration
5,371,111
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Q: This course was revised on 6/4/2013. What changed?

A: The old version of this course was 6 years old and it was time for a complete revision, using PHP 5.4. (The tutorials will work with any version of PHP and covers any differences you might encounter). The author has also added updated installation instructions for Mac OS X Mountain Lion and Windows 8. The topics and end project are the same, but the code is slightly different. It also addresses frequently asked questions from the previous version.

Q: This course was updated on 5/20/2015. What changed?

A: We added one movie called "Changing the document root in Yosemite," which helps the Mac installation run more smoothly.

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