PHP

• check ini file: php --ini

• regex: preg_match ( string $pattern , string $subject , array &$matches === null , int $flags === 0 , int $offset === 0 ) : int|false

• hash password: $hash = password_hash("admin", PASSWORD_DEFAULT);

• suppress warning messages: error_reporting(E_ERROR | E_PARSE);
• install common packages: sudo apt install php-common php-curl php-json php-mbstring php-mysql php-xml php-zip php-sqlite3 php-gd php-bcmath
• turn on types: declare(strict_types=1)

composer

• install lib: composer require symfony/http-kernel
• uninstall lib: composer remove vendor/package
• docker: docker run --rm --volume $PWD:/app --user $(id -u):$(id -g) composer <command>

docker

• run php server inside docker:
  • docker run --rm -it -p 8080:8080 -v $PWD:/code php sh
  • cd /code
  • php -S 0.0.0.0:8080