This article mainly introduces about exporting mongo library to local, which has certain reference value. Now I share it with everyone. Friends in need can refer to it
Requirements:
In yii Under the framework, export the data in the production mongo library to a json file and download it to the local
Call:
1. Quote
public function actionExport() { public $target='/WWW/web/html/import/'; //windows 导出文件所在目录 $export =new Export($target,'QuestionUser',96); }# under /web/Controllers/TestController.php ##2. Create Export.php under /web/model
<?php /*导出mongo库中的数据 * @author lizhihui * @date 2018-5-29 * 调用例子:Export('MyModel',96); //导出数据库MyModel中qId为96的数据 */ Class Export { public $target; public $model; //数据库对象 string,例如:'QuestionAnswer','QuestionUser' public $qId; //问卷id int public $db; /* * $target 导出文件所在目录 * $model * $qId */ public function __construct($target,$model,$qId) { $this->target = $target; $this->db=$model; $this->model = new $model; $this->qId = (int)$qId; $this->export(); } /** * 导出mongo生产数据用于本地测试 * @author lizhihui * @date 2018-5-29 */ public function Export() { $iCount = $this->model->count(array( 'conditions'=>array( 'qId'=>array('equals' => $this->qId), )) ); if(!$iCount){ $this->showMessage('数据为空'); } $nStart = 0; //起始记录 $nCount = 100; //每次处理记录数 $nPage = intval($iCount/$nCount)+1; $aReault=array(); for ($i=0;$iarray( 'qId'=>array('equals' => $qId), ), 'limit'=>$nCount, 'offset'=>$nStart, ); $arr = $this->model->findAll($sWhere); if(!is_dir($this->target)){ mkdir($this->target); } //写入文件 $limit = 1000;//每隔$limit行,刷新一下输出buffer,不要太大,也不要太小 foreach ($arr as $key => $val) { if($key!=0 && $key%$limit==0){ ob_flush(); flush(); } $attr=$val->attributes; //整理数据,删除不必要的键值 unset($attr['_id']); unset($attr['current_db']); unset($attr['pageInfo']); $aReault[]=$attr; } $i++; $nStart = $i*$nCount; } $filePath=$this->target.$this->db.'_'.$this->qId.'.json'; file_put_contents($filePath,json_encode($aReault)); //下载文件 if(!file_exists($filePath)){ $this->showMessage('目标文件不存在!'); } header('Content-Type: application/json'); header('Content-Disposition: attachment; filename='.$this->db.'_'.$this->qId.'.json'); header('Accept-Ranges: bytes'); echo file_get_contents($filePath); } /** * 信息输出 */ private function showMessage($str, $err = 0) { if (!$str) { return false; } if ($err) { echo "[ERROR]"; } else { echo "[SUCCESS]"; } echo date("Y-m-d H:i:s", time()) . " " . $str . "\n"; exit; } }The above is the entire content of this article. I hope it will be helpful to everyone’s study. For more related content, please pay attention to the PHP Chinese website! Related recommendations:
How to scan files in a directory and enter them into the database in the Yii framework
The above is the detailed content of Problem solving on how to export mongo library to local. For more information, please follow other related articles on the PHP Chinese website!

Reasons for PHPSession failure include configuration errors, cookie issues, and session expiration. 1. Configuration error: Check and set the correct session.save_path. 2.Cookie problem: Make sure the cookie is set correctly. 3.Session expires: Adjust session.gc_maxlifetime value to extend session time.

Methods to debug session problems in PHP include: 1. Check whether the session is started correctly; 2. Verify the delivery of the session ID; 3. Check the storage and reading of session data; 4. Check the server configuration. By outputting session ID and data, viewing session file content, etc., you can effectively diagnose and solve session-related problems.

Multiple calls to session_start() will result in warning messages and possible data overwrites. 1) PHP will issue a warning, prompting that the session has been started. 2) It may cause unexpected overwriting of session data. 3) Use session_status() to check the session status to avoid repeated calls.

Configuring the session lifecycle in PHP can be achieved by setting session.gc_maxlifetime and session.cookie_lifetime. 1) session.gc_maxlifetime controls the survival time of server-side session data, 2) session.cookie_lifetime controls the life cycle of client cookies. When set to 0, the cookie expires when the browser is closed.

The main advantages of using database storage sessions include persistence, scalability, and security. 1. Persistence: Even if the server restarts, the session data can remain unchanged. 2. Scalability: Applicable to distributed systems, ensuring that session data is synchronized between multiple servers. 3. Security: The database provides encrypted storage to protect sensitive information.

Implementing custom session processing in PHP can be done by implementing the SessionHandlerInterface interface. The specific steps include: 1) Creating a class that implements SessionHandlerInterface, such as CustomSessionHandler; 2) Rewriting methods in the interface (such as open, close, read, write, destroy, gc) to define the life cycle and storage method of session data; 3) Register a custom session processor in a PHP script and start the session. This allows data to be stored in media such as MySQL and Redis to improve performance, security and scalability.

SessionID is a mechanism used in web applications to track user session status. 1. It is a randomly generated string used to maintain user's identity information during multiple interactions between the user and the server. 2. The server generates and sends it to the client through cookies or URL parameters to help identify and associate these requests in multiple requests of the user. 3. Generation usually uses random algorithms to ensure uniqueness and unpredictability. 4. In actual development, in-memory databases such as Redis can be used to store session data to improve performance and security.

Managing sessions in stateless environments such as APIs can be achieved by using JWT or cookies. 1. JWT is suitable for statelessness and scalability, but it is large in size when it comes to big data. 2.Cookies are more traditional and easy to implement, but they need to be configured with caution to ensure security.


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

SecLists
SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.

mPDF
mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),

SublimeText3 Linux new version
SublimeText3 Linux latest version

Notepad++7.3.1
Easy-to-use and free code editor

DVWA
Damn Vulnerable Web App (DVWA) is a PHP/MySQL web application that is very vulnerable. Its main goals are to be an aid for security professionals to test their skills and tools in a legal environment, to help web developers better understand the process of securing web applications, and to help teachers/students teach/learn in a classroom environment Web application security. The goal of DVWA is to practice some of the most common web vulnerabilities through a simple and straightforward interface, with varying degrees of difficulty. Please note that this software
