WP_Filesystem_SSH2::__construct( array $opt = null )

98	public function __construct( $opt = null ) {99		$this->method  = 'ssh2';100		$this->errors  = new WP_Error();101		$this->options = array(102			'port'     => 22,103			'hostname' => '',104			'username' => '',105			'password' => null,106		);107 108		// Check if possible to use ssh2 functions.109		if ( ! extension_loaded( 'ssh2' ) ) {110			$this->errors->add( 'no_ssh2_ext', __( 'The ssh2 PHP extension is not available' ) );111			return;112		}113 114		if ( ! is_array( $opt ) ) {115			$opt = array();116		}117 118		// Set defaults:119		if ( ! empty( $opt['port'] ) ) {120			$this->options['port'] = $opt['port'];121		}122 123		if ( empty( $opt['hostname'] ) ) {124			$this->errors->add( 'empty_hostname', __( 'SSH2 hostname is required' ) );125		} else {126			$this->options['hostname'] = $opt['hostname'];127		}128 129		// Check if the options provided are OK.130		if ( ! empty( $opt['public_key'] ) && ! empty( $opt['private_key'] ) ) {131			$this->options['public_key']  = $opt['public_key'];132			$this->options['private_key'] = $opt['private_key'];133 134			$this->options['hostkey'] = array( 'hostkey' => 'ssh-rsa,ssh-ed25519' );135 136			$this->keys = true;137		}138 139		// A username is always required, whether authenticating with a password or with keys.140		if ( empty( $opt['username'] ) ) {141			$this->errors->add( 'empty_username', __( 'SSH2 username is required' ) );142		} else {143			$this->options['username'] = $opt['username'];144		}145 146		if ( ! empty( $opt['password'] ) ) {147			$this->options['password'] = $opt['password'];148		} elseif ( ! $this->keys ) {149			// Password can be blank if we are using keys.150			$this->errors->add( 'empty_password', __( 'SSH2 password is required' ) );151		}152	}