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    FTP context options

    FTP context options — FTP context option listing

    Description

    Context options for ftp:// and ftps:// transports.

    Options

    overwrite bool

    Allow overwriting of already existing files on remote server. Applies to write mode (uploading) only.

    Defaults to false.

    resume_pos int

    File offset at which to begin transfer. Applies to read mode (downloading) only.

    Defaults to 0 (Beginning of File).

    proxy string

    Proxy FTP request via http proxy server. Applies to file read operations only. Ex: tcp://squid.example.com:8000.

    Notes

    Note: Underlying socket stream context options
    Additional context options may be supported by the underlying transport. For ftp:// streams, refer to context options for the tcp:// transport. For ftps:// streams, refer to context options for the ssl:// transport.

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    User Contributed Notes 3 notes

    up
    17
    php dot net at misterchucker dot com
    15 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($fh);
    }
    else
    {
    die(    'Could not open file.');
    }
    ?>
    up
    -1
    dev at codesatori dot com
    8 years ago
    Apparently the overwrite-option only registers as false if it's absent. If I specify it as false, it acts the same as true and overwrites. Then,
    <?php
    if (empty($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
    3 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');

    $contenido = '';
    //Traduccion mientras el contenido del archivo no este al final del fichero ==> feof
    while (!feof($flujo)) {
    //Entonces lee 8192 bytes del archivo y añadelos a la variable contenido
    $contenido .= fread($flujo, 8192);
    }
    \escribir::verifacionnota($contenido, 'VARDUMP CONTENIDO');
    //Cerramos el flujo
    fclose($flujo);
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