13c05-1.php

来自「介绍PHP5的给类型函数应用」· PHP 代码 · 共 237 行

<?php
// Basic FTP client software.

// Start by preparing to read from stdin.
$stdin = fopen('php://stdin', 'r');
$server = false;
$mode = FTP_ASCII;

// Declare all currently valid commands:
$commands = array('open', 'close', 'quit', 'exit', 'cd', 'ls', 'dir', 
    'pwd', 'get', 'put', 'ascii', 'binary', 'bin', 'delete', 'del');

// If parameters were provided, assume they are host, user, pass
if ($argc > 1) {
    // Remove the filename from the line
    array_shift($argv);
    // Now call the open function to handle this:
    _open($argv);
}
    
// Now, Sit and loop forever, taking user input and handling it.
while (true) {
    // First of all, give the prompt:
    echo 'phpftp> ';
    
    // Now accept User Input
    $line = trim(fgets($stdin));
    
    // Only if the line contained anything, continue:
    if ($line) {
        // Split the line into an array of space separated entries:
        $opts = explode(' ', $line);
        $cmd = strtolower(array_shift($opts));

        // Take the first entry as a command, and execute the appropriate
        //  function, but first make sure it is a valid command!
        if (!in_array($cmd, $commands)) {
            echo "! Command not supported.\n";
        }
        // If server is false, only allow 'open'
        // Otherwise, don't allow open!
        elseif (($server xor ($cmd != 'open')) && ($cmd != 'quit') 
                && ($cmd != 'exit')) {
            echo "! Invalid server status for this command.\n";
        } else {
            // Otherwise, we can execute whatever command they gave us.
            // Just call it as a function name, it will exist at this point!
            $func = "_{$cmd}";
            $func($opts);
        }
    }
}

// Now declare a function for each command!

// To open a connection:
function _open($opts) {
    global $server, $stdin;
    
    // Prepare to open the connection, prompt for missing items such as host:
    if (!isset($opts[0])) {
        echo '? Host: ';
        $opts[0] = trim(fgets($stdin));
    }
    
    // And Username:
    if (!isset($opts[1])) {
        echo '? User: ';
        $opts[1] = trim(fgets($stdin));
    }

    // And Finally, password -- Note that this will be visible on the screen
    if (!isset($opts[2])) {
        echo '? Pass: ';
        $opts[2] = trim(fgets($stdin));
    }

    // Now we have what we need, attempt to open!
    if (!($server = @ftp_connect($opts[0]))) {
        echo "! Error, cannot connect to host!\n";
        $server = false;
    } else {
        // We connected, try to login
        if (!(@ftp_login($server, $opts[1], $opts[2]))) {
            echo "! Error, Username/Password not accepted!\n";
            ftp_close($server);
            $server = false;
        } else {
            // It worked, let 'em know!
            echo "- Connected to {$opts[0]}\n";
            
            // Try to let them know the type of server as well:
            if ($type = ftp_systype($server)) {
                echo "- Server type: {$type}\n";
            }
            
            // Set the mode to Ascii & go ahead and let them know 
            //  what directory they are in:
            _ascii(0);
            _pwd(0);
        }
    }
}

// To close a connection:
function _close($opts) {
    @ftp_close($GLOBALS['server']);
    $GLOBALS['server'] = false;
    echo "- Connection Closed.\n";
}

// To change directories
function _cd($opts) {
    // Try to change to the directory that they specified:
    if (!(@ftp_chdir($GLOBALS['server'], @$opts[0]))) {
        echo "! Error, Failed to change directory\n";
    }
    
    // In either case, give them their current directory:
    _pwd(0);
}

// To quit the program!
function _exit($opts) {
    // If we are currently connected, close first:
    if ($GLOBALS['server']) {
        _close(0);
    }
    echo "- Goodbye!\n";
    exit();
}
function _quit($opts) {
    _exit($opts);
}

// To get a directory listing:
function _ls($opts) {
    // Use rawlist to get a nicely formatted version from the server.
    // Pass the opts all collapsed into one string if the person used them:
    $optstring = implode(' ', $opts);
    if ($res = ftp_rawlist($GLOBALS['server'], $optstring)) {
        foreach ($res as $r) { echo "{$r}\n"; }
    } else {
        // Give an error statement
        echo "! Error, could not generate directory listing\n";
    }
}
function _dir($opts) {
    _ls($opts);
}

// To figure out what directory you are in:
function _pwd($opts) {
    // Get the current directory, and echo it:
    $cwd = ftp_pwd($GLOBALS['server']);
    echo "- Current directory: {$cwd}\n";
}

// To get a file from the remote host, and save it locally.
function _get($opts) {
    // If we don't have any options, give an error
    if (!($opts)) {
        echo "! Error, no file specified\n";
    } else {
        // If we don't have a second option, assume a desire to
        // save the file into the current directory, with the same name
        if (!isset($opts[1])) {
            $opts[1] = basename($opts[0]);
        }
        
        // Now, attempt to save the file.
        if (!@ftp_get($GLOBALS['server'], $opts[1], $opts[0], 
                $GLOBALS['mode'])) {
            echo "! Error - Could not download file\n";
        } else {
            echo "- Data saved to file: {$opts[1]}\n";
        }
    }
}

// To put a local file to the remote host:
function _put($opts) {
    // If we don't have any options, give an error
    if (!($opts)) {
        echo "! Error, no file specified\n";
    } else {
        // If we don't have a second option, assume a desire to
        // save the file into the current directory, with the same name
        if (!isset($opts[1])) {
            $opts[1] = basename($opts[0]);
        }
        
        // Now, attempt to save the file.
        if (!@ftp_put($GLOBALS['server'], $opts[1], $opts[0], 
                $GLOBALS['mode'])) {
            echo "! Error - Could not upload file\n";
        } else {
            echo "- Data uploaded to file: {$opts[1]}\n";
        }
    }
}

// To Change the transfer mode to ASCII
function _ascii($opts) {
    // Just change it, and echo
    $GLOBALS['mode'] = FTP_ASCII;
    echo "- Transfer mode: ASCII\n";
}

// To Change the transfer mode to Binary
function _binary($opts) {
    // Just change it, and echo
    $GLOBALS['mode'] = FTP_BINARY;
    echo "- Transfer mode: Binary\n";
}
function _bin($opts) {
    _binary($opts);
}

// Allow for deleting of files
function _delete($opts) {
    // If we don't have any options, give an error
    if (!($opts)) {
        echo "! Error, no file specified\n";
    } else {
        // Now, attempt to delete the file
        if (!@ftp_delete($GLOBALS['server'], $opts[0])) {
            echo "! Error - Could not delete file\n";
        } else {
            echo "- File Deleted: {$opts[0]}\n";
        }
    }
}
function _del($opts) {
    _delete($opts);
}
?>