PHP-da inkrement va dekrement

Shuningdek, inkrement va dekrement amallarini ham qo‘llash mumkin:

<?php
	$arr = [1, 2, 3, 4];
	
	$arr[0]++;
	++$arr[1];
	$arr[2]--;
	--$arr[3];
	
	var_dump($arr); // chiqaradi [2, 3, 2, 3]
?>

№1

Quyidagi kod berilgan:

<?php
	$arr = ['a' => 1, 'b' => 2, 'c' => 3];
	
	$arr['a']++;
	$arr['a']++;
	$arr['b']--;
	$arr['c']--;
	$arr['c']--;
	
	var_dump($arr);
?>

Kodni ishga tushirmasdan var_dump funksiyasining natijasi qanday bo‘lishini tushuntiring.