README

This is an PHP7 implementation to easy generate an little bit of "magic" extra functionality to you're PHP classes.

If you extend you're class from one of the classes of \UK\DynamicProperties so it adds dynamic class instance properties with read or read+write access. It requires only the presence of some get*() and/or set*() methods.

Status

Installation

composer require uk/dynamic-properties

Usage

The usage is really simple.

Why should I use dynamic properties?

You should not use it but you can, if you see the advantages.

Most modern IDE's like PHPStorm or Netbeans supports the dynamic properties with the code completion feature if the Properties have the correct PHP-Doc tag notation.

It means for example, if you provide a dynamic readonly property with the name $foo of type string

/**
 * …
 *
 * @property-read string $foo Description of the property…
 */

For read + write access you only have to replace @property-read with @property.

Dynamic property read access

If you have an class that define methods for getting some instance properties and they are with an name format like getPropertyName1() or getPropertyName2() etc. pp. You only must extend the class from the \UK\DynamicProperties\ExplicitGetter class and you can access the Properties directly like $myClassInstance->propertyName1 or $myClassInstance->propertyName2 for read access.

The class will always work like before but with the extra properties.

# include \dirname( __DIR__ ) . '/vendor/autoload.php';

use UK\DynamicProperties\ExplicitGetter;

/**
 * @property-read string $foo …
 * @property-read bool   $bar …
 */
class MyClass extends ExplicitGetter
{

   private $properties = [
      'foo'      => 'foo',
      'bar'      => true
   ];

   public function getFoo() : string
   {
      return $this->properties[ 'foo' ];
   }
   public function getBar() : bool
   {
      return $this->properties[ 'bar' ];
   }

}

Remember to do not forget to write the required class documentation for the dynamic available read only properties, like in the example docblock below.

Dynamic property read+write access

If you also need write access to the properties you must replace the UK\DynamicProperties\ExplicitGetter with the UK\DynamicProperties\ExplicitGetterSetter class an implement the required set???() methods

#include \dirname( __DIR__ ) . '/vendor/autoload.php';


use UK\DynamicProperties\ExplicitGetterSetter;


/**
 * @property      string $foo …
 * @property-read bool   $bar …
 */
class MyClass extends ExplicitGetterSetter
{

   private $properties = [
      'foo'      => 'foo',
      'bar'      => true
   ];

   public function getFoo() : string
   {
      return $this->properties[ 'foo' ];
   }

   public function getBar() : bool
   {
      return $this->properties[ 'bar' ];
   }

   public function setFoo( string $value ) : MyClass
   {
      if ( \strlen( $value ) < 1 )
      {
         throw new \LogicException( 'Foo can not use an empty string' );
      }
      $this->properties[ 'foo' ] = $value;
      return $this;
   }

}

Special cases: Ignore Getters and/or Setters

Often not all get* and/or set* methods should be usable as dynamic properties.

For this cases you can explicit declare the names of the properties that should not be accessible by the dynamic way.

Fo it you have to define this dynamic property names inside the constructor of the extending class:

   public function __construct()
   {

      // ignore the getBar() method
      $this->ignoreGetProperties = [ 'bar' ];

      // If the class extends from ExplicitGetterSetter you can also
      // Define the getter that should be ignored. e.g.: ignore setFoo()
      $this->ignoreSetProperties = [ 'foo' ];

   }

End of document :-)

uk / dynamic-properties

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