PHP

install php7.4 in linux server

For install all important php 7.4 extensions
apt install php7.4-common php7.4-mysql php7.4-xml php7.4-xmlrpc php7.4-curl php7.4-gd php7.4-imagick php7.4-cli php7.4-dev php7.4-imap php7.4-mbstring php7.4-opcache php7.4-soap php7.4-zip php7.4-intl -y

install php7.4 linux

sudo apt install software-properties-common
sudo add-apt-repository ppa:ondrej/php
sudo apt update
sudo apt install php7.4-common php7.4-mysql php7.4-xml php7.4-xmlrpc php7.4-curl php7.4-gd php7.4-imagick php7.4-cli php7.4-dev php7.4-imap php7.4-mbstring php7.4-opcache php7.4-soap php7.4-zip php7.4-intl -y

// Last part is stolen from Lokesh003Coding's answer <3
// This snippet should work on the currently most recent Linux distro

install php 7.4

sudo apt install php7.4-common php7.4-cli php7.4-bcmath php7.4-bz2 php7.4-curl php7.4-gd php7.4-intl php7.4-json php7.4-mbstring php7.4-readline php7.4-xml php7.4-zip php7.4-fpm

install php7

for simple you can install XAMPP
https://www.apachefriends.org/download.html

php version 7.4

function test(...$args) { var_dump($args); }
test(1, 2, 3);

php version 7.4

$arr = [...$args];

php version 7.4

array(5) {
	[0]=>
	string(6) "banana"
	[1]=>
	string(6) "orange"
	[2]=>
	string(5) "apple"
	[3]=>
	string(4) "pear"
	[4]=>
	string(10) "watermelon"
}

download php 7.4

download XAMPP
https://www.apachefriends.org/download.html

php version 7.4

Parse error: syntax error, unexpected '...' (T_ELLIPSIS), expecting ']' in /app/spread-operator.php on line 3

php version 7.4

$parts = ['apple', 'pear'];
$fruits = ['banana', 'orange', ...$parts, 'watermelon'];
var_dump($fruits);