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基于 Drools 激励的 PHP 规则引擎的概念证明。

用法

        // initialise rules engines with the top of the directory containing namespaced rule files. Ex: __DIR__ . "/../Fixtures/namespaces"
       $rulesEngine = new RulesEngine(__DIR__ . "/../Fixtures/namespaces"[, EventDispatcher $eventDispatcher]);
       // add facts to provide information to the rules engine via class, array, etc.
       $rulesEngine->addFact(
       'SimpleObject', [
            $value => 0,
            $hasPassed => false
       ]);
       
       //Set the Namespace, this loads all rules  in the hierarchy of the namespace.
       $rulesEngine->setNamespace('Org\Test');

        // Optionally pass in a PSR-3 Compliant logger.
       $rulesEngine->setLogger(new Logger());

       // Run the rules on the facts
       $rulesEngine->run();

示例规则文件 (.rf.yml)

namespace: Org\Test
rules:
  'Simple Object Rule':
    when:
      # When an evaluation line is prefixed with "<key>:"  the result 
      # is stored as a fact that can be referenced later.
      - obj: 'SimpleObject' 
      - 'obj.value == 42'
    then:
      - 'SimpleObject.hasPassed = true'
  
  'Simple Object Two Rule':
    when:
      'SimpleObjectTwo.getValue() == 5555'
    then:
      - 'SimpleObjectTwo.setString("Woo!")'

注意：更多示例可以在 tests/Fixtures/namespaces 目录中找到。

事件监听器

在规则的整个生命周期中会触发多个事件。这些事件目前存在于 src/Events 目录中，可以通过将 Symfony 事件调度器作为可选参数传递给构造函数来监听。未来的版本可能会允许在规则中触发自定义事件。

mcneely / rulesengine

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