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我需要在基于数据的函数中声明一堆变量，这些数据通过使用foreachwithswitch语句与 another循环foreach。我想我误解了我正在使用的变量的范围，任何帮助都会很棒。

class Users {

    public function createUserData(){
        $user = $this->getUserData(); //not shown function
        $this->createFullDataSet($user);
    }

    private function createFullDataSet($user){
        foreach( $user['meta'][0] as $key => $value) {
        //variables required later
        $entity_def_id = 0;
        $entity_id = 0;
        $data_def_id = 0;
        $user_id = 0;
        //thats plenty, you get the idea

        switch( $key ){
           case "id":
               //set $user_id to use later
               $user_id = $value; // <<-- DOESN'T WORK, only works within the case
               break;
           case "email":
           case "username":
           case //lots of other cases...
               break;
           case "location":
           case "hometown":
           case "something":
               //for the last three, the data structure is the same, good test case
               //foreach starts when certain conditions met, irrelevant for question
               foreach( $value as $data_key => $data_value ){
                   $data_type = 'string';
                   if( is_numeric( $data_value )
                       $data_type = 'integer';

                   $data_def_id = $this->createDataDef( some $vars ); //returns an ID using $pdo->lastInsertId(); ( works as has echo'd correctly, at least within this case )

                   $this->createSomethingElse //with variables within this foreach, works
               }
               break;
            } //end of switch
            $this->createRelation( $data_def_id ); // <<-- DOESN'T WORK!! Empty variable
        }
    }

    private function createRelation( $data_def_id ){
        // something awesome happens!
    }
}

从上面的代码可以看出，我想在switch语句之外使用一个变量，虽然由于现有数据结构需要在foreach-> switch->中声明foreach（这个数据结构很痛苦，这就是为什么需要在任何人问之前完成：不，不能“只是改变以使其更容易”）。

现在我一直在阅读 foreach 和 switch 语句的变量范围（here、here、here和here并试图找到更多），但是对于为什么$data_def_id在函数的开头设置为 的0, 没有更明智不要重置为内部出现的任何值foreach。我试图避免使用global变量，因为其中一些功能将在产品中使用。

我需要能够在private function整个私有函数（包括foreach,switch等）中使用 , 中的变量。我做错了什么，我该如何解决？

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2 回答 2

1

好的，找到了答案。

class Users {

    public function createUserData(){
        $user = $this->getUserData(); //not shown function
        $this->createFullDataSet($user);
    }

    private function createFullDataSet($user){//variables required later
        static $entity_def_id = 0; //static within function instead of non-static within foreach
        static $entity_id = 0;
        static $data_def_id = 0;
        static $user_id = 0;
        //thats plenty, you get the idea
        foreach( $user['meta'][0] as $key => $value) {
            //remainder of that method with switch( foreach () )
        }
    }

    private function createRelation( $data_def_id ){
        // something awesome happens!
    }
}

通过将变量声明为static函数内，整个函数，包括其中的方法都可以使用变量。花了我足够长的时间：s。

于 2013-06-18T10:18:00.057 回答
0

您如何将它们定义为class properties？

class User {

    private $data_def_id;

    private function createFullDataSet($user){
        //....
        $this->data_def_id = $this->createDataDef( some $vars );

    }
}
于 2013-06-18T09:33:50.070 回答