php - Enforce Method Call Required by Object -

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i created ssh2 wrapper. have read constructor should not fail, ssh2 connection not done in wrapper, method connect(). question is: how make sure connect() called? need called once.

class uploader {    private $user; private $pass; private $host;    private $ssh = null; private $sftp = null;    public function __construct($host, $user, $pass) {       $this->host = $host; $this->user = $user; $this->pass = $pass;    }    public function connect() {       if ($this->ssh === null) {          $this->ssh = ssh2_connect($this->host);          ssh2_auth_password($this->ssh, $this->user, $this->pass);          $this->sftp = ssh2_sftp($this->ssh);       }    } }

what best way ensure connect() called? should application call it?

$ssh = new uploader('host', 'user', 'pass'); $ssh->connect();

or in class methods?

... public function upload($source, $dest, $filename) {    $this->connect();    ... }  public function delete($file) {    $this->connect();    ... }

neither of these seems ideal.

i thought making static method wrap constructor , connect, constructor have private , have read static methods undesirable (mostly unit testing).

i have read static methods undesirable (mostly unit testing).

static methods undesirable things, factory methods isn't 1 of them. make perfect sense there , not impact unit testing. so, go ahead , make static factory method.


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