PHP ftp_delete()函数用法示例和解析

【PHP ftp_delete()函数用法示例和解析】ftp_delete()函数是PHP中的内置函数, 用于删除FTP服务器上的文件。
语法如下:

ftp_delete( $ftp_connection, $file )

参数:此函数接受上述和以下所述的两个参数:
  • $ftp_connection:它是必填参数。它指定用于执行FTP命令或功能的现有FTP连接。
  • $file:它是必填参数。它指定要删除的服务器的文件路径。
返回值:成功返回TRUE, 失败返回FALSE。
注意:
  • 此功能可用于PHP 4.0.0和更高版本。
  • 以下示例无法在在线IDE上运行。因此, 请尝试使用适当的ftp服务器名称, 用户名和密码在某些PHP托管服务器或localhost中运行。
  • ★★★确保作为参数删除提供的文件存在并且具有登录ftp连接的ftp用户的删除权限, 否则会产生错误。
例子:
< ?php//Connect to FTP server//Assign ftp server to the variable $ftp_server = "localhost" ; //Use correct ftp username $ftp_username = "user" ; //Use correct ftp password corresponding //to the ftp username $ftp_userpass = "user" ; //Filename or filename with path to specify //the file on server to be deleted $file = "test.txt" ; //Establishing ftp connection $ftp_connection = ftp_connect( $ftp_server ) or die ( "Could not connect to $ftp_server" ); if ( $ftp_connection ) { echo "successfully connected to the ftp server!" ; //Logging in to established connection with //ftp username and password $login = ftp_login( $ftp_connection , $ftp_username , $ftp_userpass ); if ( $login ) { //Checking whether logged in successfully or not echo "< br> logged in successfully!" ; //ftp_delete() function to delete file from FTP server if (ftp_delete( $ftp_connection , $file )) { echo "< br> deletion of " . $file . " is successful." ; } else { echo "< br> Error while deleting the file " . $file ; } } else { echo "< br> login failed!" ; }//Closeingconnection if (ftp_close( $ftp_connection )) { echo "< br> Connection closed Successfully!" ; } } ?>

输出如下:
successfully connected to the ftp server! logged in successfully! deletion of ./htdocs/test.txt is successful. Connection closed Successfully!

如果该文件被删除并再次运行同一程序, 但前提是该文件不存在(已删除), 因此会发生错误。输出看起来像
successfully connected to the ftp server! logged in successfully! Error while deleting the file ./htdocs/test.txt Connection closed Successfully!

参考: https://www.php.net/manual/en/function.ftp-delete.php

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