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# Secure Shell 2

`ssh2.shell://` `ssh2.exec://` `ssh2.tunnel://` `ssh2.sftp://` `ssh2.scp://` PHP 4.3.0 and up (PECL)

- `ssh2.shell://user:pass@example.com:22/xterm`

- `ssh2.exec://user:pass@example.com:22/usr/local/bin/somecmd`

- `ssh2.tunnel://user:pass@example.com:22/192.168.0.1:14`

- `ssh2.sftp://user:pass@example.com:22/path/to/filename`

> This wrapper is not enabled by default: In order to use the `ssh2.*://` wrappers you must install the SSH2 extension available from PECL.

In addition to accepting traditional URI login details, the ssh2 wrappers will also reuse open connections by passing the connection resource in the host portion of the URL.

Beispiel M-2. Opening a stream from an active connection

`<?php $session = ssh2_connect('example.com', 22); ssh2_auth_pubkey_file($session, 'username', '/home/username/.ssh/id_rsa.pub', '/home/username/.ssh/id_rsa', 'secret'); $stream = fopen("ssh2.tunnel://$session/remote.example.com:1234", 'r'); ?>`

Tabelle M-8. Wrapper Summary

Attribute | ssh2.shell | ssh2.exec | ssh2.tunnel | ssh2.sftp | ssh2.scp
--- | --- | --- | --- | --- | ---
Restricted by allow_url_fopen. | Yes | Yes | Yes | Yes | Yes
Allows Reading | Yes | Yes | Yes | Yes | Yes
Allows Writing | Yes | Yes | Yes | Yes | No
Allows Appending | No | No | No | Yes (When supported by server) | No
Allows Simultaneous Reading and Writing | Yes | Yes | Yes | Yes | No
Supports stat() | No | No | No | Yes | No
Supports unlink() | No | No | No | Yes | No
Supports rename() | No | No | No | Yes | No
Supports mkdir() | No | No | No | Yes | No
Supports rmdir() | No | No | No | Yes | No

Tabelle M-9. Context options

Name | Usage | Default
--- | --- | ---
session | Preconnected ssh2 resource to be reused |
sftp | Preallocated sftp resource to be reused |
methods | Key exchange, hostkey, cipher, compression, and MAC methods to use |
callbacks |  |
username | Username to connect as |
password | Password to use with password authentication |
pubkey_file | Name of public key file to use for authentication |
privkey_file | Name of private key file to use for authentication |
env | Associate array of environment variables to set |
term | Terminal emulation type to request when allocating a pty |
term_width | Width of terminal requested when allocating a pty |
term_height | Height of terminal requested when allocating a pty |
term_units | Units to use with term_width and term_height | `SSH2_TERM_UNIT_CHARS`

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