PHP echo Function Applications Syntax and Example Code
Tips for learning to program in PHP:Amazon.in:Appstore for Android
Unacademy - India's largest learning platform
The Art of Modern PHP 8: Learn how to write modern, performant, and enterprise-ready code with the latest PHP features and practices: Edmonds, Joseph, Mitchell, Lorna Jane: 9781800566156: Amazon.com: Books
PHP: Calling javascript function in echo outputs function name - Stack Overflow