what is an abstract class in php code example

Example 1: abstract function php

abstract class absclass { // mark the entire class as abstract
    abstract public function fuc();
}

Example 2: PHP OOP - Abstract Classes

<?php
abstract class 
    ParentClass {
  abstract public function someMethod1();
  
    abstract public function someMethod2($name, $color);
  abstract 
    public function someMethod3() : string;
}
?>