这是一个快速的函数，我有躺在那里，它正是你所说的。它使用一些核心WP功能来完成工作，您必须对其进行修改以满足您的需要，可能需要再次检查事物的安全性，但它应该给您一个良好的开端。

function auto_function() {
    if ( isset( $_GET[\'username\'] ) && isset( $_GET[\'email\'] ) ){

        $user_name   = $_GET[\'username\'];
        $user_email  = $_GET[\'email\'];

        $user_id = username_exists( $user_name );
        if ( ! $user_id and email_exists( $user_email ) == false ) {
            $random_password = wp_generate_password( $length=12, $include_standard_special_chars=false );
            $user_id         = wp_create_user( $user_name, $random_password, $user_email );

            $creds = array();
            $creds[\'user_login\'] = $user_name;
            $creds[\'user_password\'] = $random_password;
            $creds[\'remember\'] = true;
            $user = wp_signon( $creds, false );

            $meta_key = \'some_meta_key\';
            $meta =& get_user_meta($user, $meta_key, true);
            $site_allowance = 3;

            add_user_meta( $user->id, $meta_key, $site_allowance , TRUE );

            #Redirect to help page
            wp_redirect( site_url(\'/user-profile/\') ); exit;

        } else {
            $random_password = __(\'User already exists.  Password inherited.\');
        }
    }
}