Question

有一个非常大的xml数据源我在PHP中解析所以我使用xmlReader因为simpleXML每次都失败 - 只是锁定并停止。即使使用xmlReader / simpleXML混合代码，它仍然会失败，所以我在xmlReader中完成所有操作 - 不幸的是。

所以，我很困惑在哪里打开和关闭与我的循环相关的xmlReader。我需要最好的记忆管理。

****Open reader Here????

Foreach ($modelArray as $model)// there are 10000 models

****OR open reader Here???

    if(!$reader->open($request_url)){
        echo "Error";
        break;
    }
    while ($reader->readToNext('Product'){ // There are 500 Products  per model
       //do my node processing here. Grab nodes and add to mysql DB
    }

    return array('msg' => $msg,'addedProdsPerManu' =>$counter_addedProdsManu);

****Close Reader HERE?

}//close foreach

****OR Close Reader HERE?

对于最有效的内存利用率，我们非常感谢任何建议，因此该程序将一直运行。

谢谢

Answer 1

以下/** */

之间的评论

/**
 * If you can, open it here.
 */

Foreach ($modelArray as $model)// there are 10000 models

    /**
     * If you open the reader here, you are doing 10000 network requests.
     *
     * BUT depends on your needs, if the url must be get from the model, you'll
     * have to connect here.
     */
    if(!$reader->open($request_url)){
        echo "Error";
        break;
    }

    while ($reader->readToNext('Product'){ // There are 500 Products  per model
       //do my node processing here. Grab nodes and add to mysql DB
    }

    /**
     * IF you opened the connection just before the while, THEN close it here.
     */

    /**
     * return HERE!?? 
     * You're just checking the first model then!!
     */        
    return array('msg' => $msg,'addedProdsPerManu' =>$counter_addedProdsManu);

}//close foreach

/**
 * If you could open the connection before the foreach, then close it here.
 */

PHP xmlReader：何时打开和关闭

1 个答案: