php 7 to 5.6
sudo apt-get purge php7.*
sudo add-apt-repository ppa:ondrej/php
sudo apt-get update
sudo apt-get install php5.6php 7 to 5.6
sudo apt-get purge php7.*
sudo add-apt-repository ppa:ondrej/php
sudo apt-get update
sudo apt-get install php5.6php 7
<?php
// Fetches the value of $_GET['user'] and returns 'nobody'
// if it does not exist.
$username = $_GET['user'] ?? 'nobody';
// This is equivalent to:
$username = isset($_GET['user']) ? $_GET['user'] : 'nobody';
// Coalescing can be chained: this will return the first
// defined value out of $_GET['user'], $_POST['user'], and
// 'nobody'.
$username = $_GET['user'] ?? $_POST['user'] ?? 'nobody';
?>Copyright © 2021 Codeinu
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