How to

PHP 7

Install PHP 7.4 - Ubuntu below 20.04

sudo apt-get update
sudo apt -y install software-properties-common
sudo add-apt-repository ppa:ondrej/php
sudo apt-get update
sudo apt -y install php7.4 php7.4-xml composer php7.4-mbstring

PHP 8

Install PHP 8.0 - Ubuntu

sudo add-apt-repository ppa:ondrej/php --force-yes
sudo apt-get update ; \
    sudo apt install php8.0-common php8.0-cli -y
php -v # Show PHP version.
php -m # Show PHP modules loaded.

Install additional extensions

An example to install a few more useful extensions:

sudo apt install php8.0-{bz2,curl,intl,mysql,readline,xml}

For development environments, code coverage tools or the Xdebug debugger can be installed as well.

sudo apt install php8.0-pcov # PCOV code coverage tool
sudo apt install php8.0-xdebug # Xdebug debugger

Purge old PHP versions

If the new installation is working as expected, you can remove the old PHP packages from the system.

sudo apt purge '^php7.4.*'

This assumes you are using PHP 7.4 as the previous version. Change php7.4 part of the command above with the appropriate PHP version.

References

• PHP.Watch

Install Pear

sudo apt install php8.0-xml php-pear 
pear install PHP_CodeSniffer-3.5.8

# or
# composer global require squizlabs/php_codesniffer:3.5.8

Commands

PHP Built-in Server

# Against current folder
php -S localhost:8888 -t .

Interactive mode

php -a

Set Default value for env vars

# Constants
define('DB_HOST', getenv('MY_DB_HOST') ?: 'my-default-database-name' );

# Variables
$host = getenv('MY_DB_HOST') ?: 'my-default-database-name';

Generate BCrypt hash

$ php -a
Interactive mode enabled

php > echo password_hash('Abcd123456', PASSWORD_DEFAULT);
$2y$10$id8o48ibJptfS7c6HL2x/uJNX4jBDSW.RYLAgx1HtG66EHvSJgM0K

Execute Shell Script from PHP

print_r(shell_exec("cat /etc/hosts"));die;

Working with Dates

$mytime = Carbon\Carbon::now();
echo $mytime->toDateTimeString();

Use PHPCS globally

Installing globally PHPCS

composer global require squizlabs/php_codesniffer

• Know your path

echo $path

• Add the line below into your ~/.zshrc ou ~/.bashrc

export PATH="/home/$USER/.config/composer/vendor/bin:$PATH"

array_map to utf8_encode

$result = array_map(function ($data) {
    return array_map('utf8_encode', $data);
}, $result);