PHP 7 Nested Anonymous Classes Tutorial - PHP Classes

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PHP 8.0 feature focus: type improvements

Inner Classes. Nested Classes  An nested class is a class that is defined inside another class.  To this point we have only studied top-level classes. - ppt download

PHP Exceptions

android - Can we instantiate interface nested inside the class in java and why it is different from kotlin? - Stack Overflow

Deep Dive into Inner and Nested Classes in Java

Deep Dive into Inner and Nested Classes in Java

What Is PHP Program

7-Kotlin-Part 2

Why we need multi-line short closures in PHP : r/PHP