PHP: Passing the JSON of Key-Value Array to Javascript: via Ajax vs direct echoing out - Stack Overflow
Associative Array in PHP | How to Create an Associative Array in PHP?
Intersect associative array from another array in php - Stack Overflow
What is the difference between numeric and associative array in loop with example? - DevOpsSchool.com
Chapter 3 Array. Indexed Versus Associative Arrays There are two kinds of arrays in PHP: indexed and associative. The keys of an indexed array are integers, - ppt download