PHP is probably the most popular web development language right now. At least 20 million domains use PHP and it’s the language used on major sites such as Wikipedia and Facebook as well as in some of the world’s biggest open-source projects like WordPress and Drupal.

• Use PHP Core Functions and Classes
• Create a Configuration File
• Always Sanitize Data That Will Go into Your Database
• Leave Error Reporting Turned On in Development Stage
• Don’t Over-Comment Your Code
• Keep Favorite Code Snippets Handy
• Use a Good Source Editor to Save You Time
• Use a MySQL Administration Tool (Like phpMyAdmin)
• Use a PHP Framework
• Connect with Other PHP Developers

For more details click here: Everything You Wanted to Know about PHP Web Development as a PHP Developer