Title: POP3::user
Published: February 3, 2022
Last modified: February 24, 2026

---

# POP3::user( $user )

[ Back to top](https://developer.wordpress.org/reference/classes/pop3/user/?output_format=md#wp--skip-link--target)

## Source

    ```php
    function user ($user = "") {
        // Sends the USER command, returns true or false

        if( empty($user) ) {
            $this->ERROR = "POP3 user: " . _("no login ID submitted");
            return false;
        } elseif(!isset($this->FP)) {
            $this->ERROR = "POP3 user: " . _("connection not established");
            return false;
        } else {
            $reply = $this->send_cmd("USER $user");
            if(!$this->is_ok($reply)) {
                $this->ERROR = "POP3 user: " . _("Error ") . "[$reply]";
                return false;
            } else
                return true;
        }
    }
    ```

[View all references](https://developer.wordpress.org/reference/files/wp-includes/class-pop3.php/)
[View on Trac](https://core.trac.wordpress.org/browser/tags/6.9.4/src/wp-includes/class-pop3.php#L125)
[View on GitHub](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/class-pop3.php#L125-L142)

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