PHP利用curl上传文件到FTP服务器(无ftp扩展情况下)
在一次需求中,需要一个FTP服务器作为中转站,程序定时在FTP服务器获取数据,定时上传数据库的数据到FTP服务器上,由于PHP没有安装ftp扩展,导致FTP操作很是麻烦,对于socket的理解不够深入,由于时间比较紧急,在同事指点下,想到了用curl方法,经过自己的整理,将curl方法整理为一个类:
?
<?php /* * To change this template, choose Tools | Templates * ftp curl方法操作类 */ class ftp{ //FTP服务器地址 public static $host = "127.0.0.1"; //FTP端口 public static $port = "2121"; //上传的FTP目录 public static $uploaddir = "upblod"; //读取的FTP目录 public static $readdir = "read"; //FTP用户名 public static $usrname = "user"; //FTP密码 public static $pwd = "pwd"; /* * curl 方法将文件上传到FTP服务器 * $filename上传到FTP的文件名,$uploadfile具体需要上传文件的地址(我用的绝对路径) */ public static function ftp_upload($filename,$uploadfile) { $url = "ftp://".self::$host.":".self::$port."/".self::$uploaddir."/".$filename; //需要上传的文件 $fp = fopen ($uploadfile, "r"); $ch = curl_init(); curl_setopt($ch, CURLOPT_VERBOSE, 1); //有意外发生则报道 curl_setopt($ch, CURLOPT_USERPWD, self::$usrname.':'.self::$pwd); //FTP登陆账号密码,模拟登陆 curl_setopt($ch, CURLOPT_URL, $url); curl_setopt($ch, CURLOPT_PUT, 1); //用HTTP上传一个文件 curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); //不输出 curl_setopt($ch, CURLOPT_INFILE, $fp); //要上传的文件 $http_result = curl_exec($ch); //执行 $error = curl_error($ch); curl_close($ch); fclose($fp); //成功上传文件 返回true if (!$error) { return true; } } /* * curl 方法将读取FTP文件并保存在本地使用 * $filenameFTP服务器文件名,$filepath 保存到本地(服务器)的目录 */ public static function ftp_read($filename,$filepath) { $curl = curl_init(); $target_ftp_file = "ftp://".self::$host.":".self::$port."/".self::$readdir."/".$filename;//完整路径 curl_setopt($curl, CURLOPT_URL,$target_ftp_file); curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1); curl_setopt($curl, CURLOPT_VERBOSE, 1); curl_setopt($curl, CURLOPT_FTP_USE_EPSV, 0); curl_setopt($curl, CURLOPT_TIMEOUT, 300); // times out after 300s curl_setopt($curl, CURLOPT_USERPWD,self::$usrname.':'.self::$pwd);//FTP用户名:密码 // Sets up the output file //本地保存目录 if(is_dir($filepath)){ $outfile = fopen($filepath.$filename, 'w');//保存到本地的文件名 curl_setopt($curl,CURLOPT_FILE,$outfile); // Executes the cURL $info = curl_exec($curl); fclose($outfile); $error_no = curl_errno($curl); curl_close($curl); //成功读取文件,返回 true if($info){ return true; } } } } ?>
?这里只是做了上传与下载文件,删除文件的操作没有涉及,有兴趣的童鞋可以研究下

PHPsessionstrackuserdataacrossmultiplepagerequestsusingauniqueIDstoredinacookie.Here'showtomanagethemeffectively:1)Startasessionwithsession_start()andstoredatain$_SESSION.2)RegeneratethesessionIDafterloginwithsession_regenerate_id(true)topreventsessi

In PHP, iterating through session data can be achieved through the following steps: 1. Start the session using session_start(). 2. Iterate through foreach loop through all key-value pairs in the $_SESSION array. 3. When processing complex data structures, use is_array() or is_object() functions and use print_r() to output detailed information. 4. When optimizing traversal, paging can be used to avoid processing large amounts of data at one time. This will help you manage and use PHP session data more efficiently in your actual project.

The session realizes user authentication through the server-side state management mechanism. 1) Session creation and generation of unique IDs, 2) IDs are passed through cookies, 3) Server stores and accesses session data through IDs, 4) User authentication and status management are realized, improving application security and user experience.

Tostoreauser'snameinaPHPsession,startthesessionwithsession_start(),thenassignthenameto$_SESSION['username'].1)Usesession_start()toinitializethesession.2)Assigntheuser'snameto$_SESSION['username'].Thisallowsyoutoaccessthenameacrossmultiplepages,enhanc

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.


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

SublimeText3 English version
Recommended: Win version, supports code prompts!

VSCode Windows 64-bit Download
A free and powerful IDE editor launched by Microsoft

PhpStorm Mac version
The latest (2018.2.1) professional PHP integrated development tool

WebStorm Mac version
Useful JavaScript development tools

Dreamweaver CS6
Visual web development tools
