Chapter 1 PHP

Single quotes in PHP denote the lack of interpolation
Double quotes allow interpolation; variables in PHP can be used.

Debugging Techniques

Run PHP scripts through the URL
Know the version of PHP you're running to better understand the issues that exist within that version
display_errors must be on
Check the HTML source code
Trust the error message

The $_SERVER Variable

What it does and what information is stored

The $_SERVER variable points to server-related information. For example, you can use this variable to find the filename of the script being run using $_SERVER['SCRIPT_FILENAME']

Length of name: 15

Name: Tyler Buchannan

Name Lower: tyler buchannan

Name Upper: TYLER BUCHANNAN

Tyler Buchannan, 16, 08/17/2008

Interpreted HTML

<p>Plain Text</p>

Formatted Number: 3,005

Formatted Float: 1.2857