PHP FTP 函数

PHP FTP简介

FTP 功能使客户端可以通过文件传输协议(FTP) 访问文件服务器。

FTP 功能用于打开、登录和关闭连接，以及从文件服务器上传、下载、重命名、删除和获取文件信息。并非所有 FTP 功能都适用于每个服务器或返回相同的结果。 PHP 3 中提供了 FTP 功能。

如果您只想读取或写入 FTP 服务器上的文件，请考虑使用 ftp:// 包装器和文件系统函数，它提供更简单、更直观的界面。

安装

为了使这些功能发挥作用，您必须使用 --enable-ftp 编译 PHP。

Windows 版本的 PHP 内置了对此扩展的支持。

PHP FTP 函数

Function	Description
ftp_alloc()	Allocates space for a file to be uploaded to the FTP server
ftp_cdup()	Changes to the parent directory on the FTP server
ftp_chdir()	Changes the current directory on the FTP server
ftp_chmod()	Sets permissions on a file via FTP
ftp_close()	Closes an FTP connection
ftp_connect()	Opens an FTP connection
ftp_delete()	Deletes a file on the FTP server
ftp_exec()	Executes a command on the FTP server
ftp_fget()	Downloads a file from the FTP server and saves it into an open local file
ftp_fput()	Uploads from an open file and saves it to a file on the FTP server
ftp_get()	Downloads a file from the FTP server
ftp_get_option()	Returns runtime options of the FTP connection
ftp_login()	Logs in to the FTP connection
ftp_mdtm()	Returns the last modified time of a specified file
ftp_mkdir()	Creates a new directory on the FTP server
ftp_mlsd()	Returns the list of files in the specified directory
ftp_nb_continue()	Continues retrieving/sending a file (non-blocking)
ftp_nb_fget()	Downloads a file from the FTP server and saves it into an open file (non-blocking)
ftp_nb_fput()	Uploads from an open file and saves it to a file on the FTP server (non-blocking)
ftp_nb_get()	Downloads a file from the FTP server (non-blocking)
ftp_nb_put()	Uploads a file to the FTP server (non-blocking)
ftp_nlist()	Returns a list of files in the specified directory on the FTP server
ftp_pasv()	Turns passive mode on or off
ftp_put()	Uploads a file to the FTP server
ftp_pwd()	Returns the current directory name
ftp_quit()	Alias of ftp_close()
ftp_raw()	Sends a raw command to the FTP server
ftp_rawlist()	Returns a list of files with file information from a specified directory
ftp_rename()	Renames a file or directory on the FTP server
ftp_rmdir()	Deletes an empty directory on the FTP server
ftp_set_option()	Sets runtime options for the FTP connection
ftp_site()	Sends an FTP SITE command to the FTP server
ftp_size()	Returns the size of the specified file
ftp_ssl_connect()	Opens a secure SSL-FTP connection
ftp_systype()	Returns the system type identifier of the FTP server

PHP 预定义 FTP 常量

Constant	Type	Description
FTP_ASCII	Integer
FTP_AUTOSEEK	Integer
FTP_AUTORESUME	Integer
FTP_BINARY	Integer
FTP_FAILED	Integer	Asynchronous transfer has failed
FTP_FINISHED	Integer	Asynchronous transfer is completed
FTP_IMAGE	Integer	Alias of FTP_BINARY
FTP_MOREDATA	Integer	Asynchronous transfer is in progress
FTP_TEXT	Integer	Alias of FTP_ASCII
FTP_TIMEOUT_SEC	Integer	The timeout used for network operations
FTP_USEPASVADDRESS	Boolean