[Solved] What will be the output of this PHP code?<?php session_start(); $_SESSION['count'] = ($_SESSION['count'] ?? 0) + 1; echo $_SESSION['count']; ?> | PHP

PHP - Sessions and Cookies

What will be the output of this PHP code?

<?php
session_start();
$_SESSION['count'] = ($_SESSION['count'] ?? 0) + 1;
echo $_SESSION['count'];
?>

A1 on first run, increments by 1 on each reload

BAlways 0

CError because $_SESSION['count'] is undefined

DAlways 1 regardless of reloads

Step-by-Step Solution

Solution:

Step 1: Analyze session variable increment
The code uses null coalescing to set $_SESSION['count'] to 0 if not set, then adds 1.
Step 2: Understand session persistence
Because session persists, each reload increments the count by 1 starting from 1.
Final Answer:
1 on first run, increments by 1 on each reload -> Option A
Quick Check:
Session count increments on reload = 1,2,3... [OK]

Quick Trick: Use null coalescing to initialize session vars safely [OK]

Common Mistakes:

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