FTP 上下文选项

FTP 上下文选项FTP 上下文选项列表

说明

ftp://ftps:// 传输的上下文选项。

可选项

overwrite bool

允许覆盖远程服务器上已有的文件。仅适用于写入模式(上传)。

默认为 false

resume_pos int

开始传输的文件偏移量。仅适用于读取模式(下载)。

默认为 0 (文件开头)。

proxy string

通过 http 代理服务器代理 FTP 请求。 仅适用于文件读取操作。 例如:tcp://squid.example.com:8000

注释

注意: 底层套接字流上下文选项
底层传输 可能支持其他上下文选项。 对于 ftp:// 流,请参阅 tcp:// 传输的上下文选项。 对于 ftps:// 流,请参阅 ssl:// 传输的上下文选项。

添加备注

用户贡献的备注 3 notes

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17
php dot net at misterchucker dot com
16 years ago
This is an example of how to allow fopen() to overwrite a file on an FTP site. If the stream context is not modified, an error will occur: "...failed to open stream: Remote file already exists and overwrite context option not specified...".<?php// The path to the FTP file, including login arguments$ftp_path = 'ftp://username:password@example.com/example.txt';// Allows overwriting of existing files on the remote FTP server$stream_options = array('ftp' => array('overwrite' => true));// Creates a stream context resource with the defined options$stream_context = stream_context_create($stream_options);// Opens the file for writing and truncates it to zero length if ($fh = fopen($ftp_path, 'w', 0, $stream_context)){    // Writes contents to the file    fputs($fh, 'example contents');        // Closes the file handle    fclose($fh);}else{    die('Could not open file.');}?>
up
-1
dev at codesatori dot com
8 years ago
Apparently the overwrite-option only registers as false if it's absent. If I specify it as false, it acts the same as true and overwrites. Then, <?phpif (empty($opts['overwrite'])) {    unset($opts['overwrite']);}?>...was the simple fix for my FTP stream wrapper class sporting default options. This is quite unexpected though; false means false even if I say so? Apparently PHP (7.0.2) just checks if the option exists, not its boolean value.
up
-3
instatiendaweb at gmail dot com
4 years ago
// Ruta del ftp debe coincidir con la ruta del localhost$ftp_path = 'ftp://francisco:aaa@localhost:21/ftparchivo.txt';// Escribimos las opciones de stream$stream_options = array('ftp' => array('overwrite' => TRUE));// Creamos un contexto$stream_context = stream_context_create($stream_options);\escribir::verifacionnota($stream_context, 'STREAMCONTEXT');// Abrimos el fichero que vamos a leer$flujo = fopen($ftp_path, 'r', false, $stream_context);//Funcion creada :vardump + string\escribir::verifacionnota($flujo, 'VARDUMP FOPEN');$contenido = '';//Traduccion mientras el contenido del archivo no este al final del fichero ==> feofwhile (!feof($flujo)) {//Entonces lee 8192 bytes del archivo y añadelos a la variable contenido$contenido .= fread($flujo, 8192);}\escribir::verifacionnota($contenido, 'VARDUMP CONTENIDO');//Cerramos el flujofclose($flujo);
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