Requirements

• PHP 7.1+
• Composer

Installation

composer require flashios09/php-union-types

Usage

UnionTypes::assert

UnionTypes::assert(mixed $value, string[] $types, array $options = []): void

Throw a TypeError if the given value isn't in the passed union type.

See the full list of the valid types $types string array, e.g. ['int', 'string', Posts::class, ...].

Examples:

• UnionTypes::assert(1.2, ['int', 'float']);

  ✓ should pass

• UnionTypes::assert('1.2', ['int', 'float']);

  ✖ will throw a TypeError "'1.2' must be of the union type int|float, string given"

• UnionTypes::assert('1.2', ['int', 'float', 'string']);

  ✓ should pass

• Check for instance of, added on 1.0.2

  use \DateTime;
  
  class Time extends DateTime
  {
    public static function today()
    {
      return new Time();
    }
  }
  
  $today = Time::today();

  // `instanceOf` check is enabled by default
  UnionTypes::assert($today, [\DateTime::class, 'string']);

  ✓ should pass

  // disabled using the `instanceOf` option
  UnionTypes::assert($today, [\DateTime::class, 'string', ['instanceOf' => false]]);

  ✖ will throw a TypeError "object(Time)" must be of the union type \DateTime|string, Time given"

UnionTypes::is

UnionTypes::is(mixed $value, string[] $types, array $options = []): bool

Check if the value type is one of the passed types.

Works just like UnionTypes::assert($value, $types) but it will return a bool(true/false) instead of throwing a TypeError.

See the full list of the valid types $types string array, e.g. ['int', 'string', Posts::class, ...].

Examples:

• UnionTypes::is(1.2, ['int', 'float']);

  equivalent to is_int(1.2) || is_float(1.2)

  ✓ return true

• UnionTypes::is('1.2', ['int', 'float']);

  equivalent to is_int('1.2') || is_float('1.2')

  ✖ return false

• UnionTypes::is('1.2', ['int', 'float', 'string']);

  equivalent to is_int('1.2') || is_float('1.2') || is_string('1.2')

  ✓ return true

• Check for instance of, added on 1.0.2

  use \DateTime;
  
  class Time extends DateTime
  {
    public static function today()
    {
      return new Time();
    }
  }
  
  $today = Time::today();

  // `instanceOf` check is enabled by default
  UnionTypes::assert($today, [\DateTime::class, 'string']);

  ✓ return true

  // disabled using the `instanceOf` option
  UnionTypes::assert($today, [\DateTime::class, 'string', ['instanceOf' => false]]);

  ✖ return false

UnionTypes::assertFuncArg

UnionTypes::assertFuncArg(string $argName, string[] $types, array $options = []): void

Throw a TypesError if the value of the argument isn't in the union type.

See the full list of the valid types $types string array, e.g. int, string, Posts::class ...

Examples:

• function add($a, $b)
  {
      UnionTypes::assertFuncArg('a', ['int', 'float']);
      return $a + $b;
  }
  // invocation
  add(1.2, 1);

  ✓ should pass

• class Math
  {
    public static function add($a, $b)
    {
      UnionTypes::assertFuncArg('a', ['int', 'float']);
      return $a + $b;
    }
  }
  // invocation
  Math::add('1.2', 1);

  ✖ will throw TypeError "Argument a passed to Math::add(int|float $a, ...) must be of the union type int|float, string given"

• $closure = function ($a, $b) {
      UnionTypes::assertFuncArg('a', ['int', 'float', 'string']);
      return $a + $b;
  };
  // invocation
  $closure('1.2', 1);

  ✓ should pass

• Check for instance of, added on 1.0.2

  use \DateTime;
  
  class Time extends DateTime
  {
    public static function today()
    {
      return new Time();
    }
  }
  
  $today = Time::today();

  $closure = function ($today) {
      // `instanceOf` check is enabled by default
      UnionTypes::assertFuncArg($today, [\DateTime::class, 'string']);
      // some logic here
  
      return $today;
  };
  // invocation
  $closure($today);

  ✓ should pass

  $closure = function ($today) {
      // disabled using the `instanceOf` option
      UnionTypes::assertFuncArg($today, [\DateTime::class, 'string', ['instanceOf' => false]]);
      // some logic here
  
      return $today;
  };
  // invocation
  $closure($today);

  ✖ will throw a TypeError "object(Time)" must be of the union type \DateTime|string, Time given"

Valid types:

• 'string'
• 'int'(not 'integer' or 'double')
• 'float'(not 'double' or 'decimal')
• 'bool'(not 'boolean')
• 'null'(not 'NULL')
• 'array'
• Any valid classname string, e.g Table::class or 'Cake\ORM\Table'
• resource

Configuration

• Friendly editor file path:

  By default, every thrown Error or Exception will have a called in at the end of the message called in #{stackTraceIndex} {file}:{line}, e.g. called in #0 /path/to/app/src/Controller/PostsController.php:126.

  To have a friendly editor(VSCode, Atom, SublimeText, ...) file path relative to the workspace, you need to define a constant UnionTypes.PATH_TO_APP somewhere, e.g:

  // config/bootstrap.php
  define('UnionTypes.PATH_TO_APP', '/path/to/app/');
  
  // using `$_SERVER`(isn't available in **php cli**)
  $PATH_TO_APP = isset($_SERVER['DOCUMENT_ROOT']) ? $_SERVER['DOCUMENT_ROOT'] . DIRECTORY_SEPARATOR : '';
  define('UnionTypes.PATH_TO_APP', $PATH_TO_APP);
  // using `dirname(__FILE__)`, maybe you need to remove/add some parts, depending on the `__FILE__` location.
  define('UnionTypes.PATH_TO_APP', dirname(__FILE__) . DIRECTORY_SEPARATOR;
  // using the `PWD` key of the `getEnv()` array
  define('UnionTypes.PATH_TO_APP', getEnv()['PWD'] . DIRECTORY_SEPARATOR;

  Now the /path/to/app/ prefix will be removed from the called in, e.g. called in #0 src/Controller/PostsController.php:126.

Contributing

Installation

• git clone git@github.com:flashios09/php-union-types.git
• cd php-union-types
• composer install(will install dev dependencies like whoops, kahlan, var-dumper, cakephp-codesniffer)

Start a local php server with livereload

• yarn install(node dependencies)
• yarn serve(then add your code to php-union-types/index.php and open a browser window at http://localhost:3080)

Start a local kahlan test with livereload

• yarn install(node dependencies)
• yarn test(it will watch any change in the spec folder and re-launch the test)

Linting

• composer cs-check
• composer cs-fix

Running test

• composer test

License

This project is licensed under the MIT License.