我正在编写一个代码，将表单输入数据与wp中的用户表相匹配，但它工作不正常，无论条件是真是假，它都会给出相同的消息。请帮我解决这个问题。

  function email_form_code() {
    echo \'<form action="\' . esc_url( $_SERVER[\'REQUEST_URI\'] ) . \'" method="post">\';
    echo \'<p>\';
    echo \'<p>\';
    echo \'Your Email (required) <br />\';
    echo \'<input type="email" name="email" value="\' . ( isset( $_POST["email"] ) ? esc_attr( $_POST["email"] ) : \'\' ) . \'" size="40" />\';
    echo \'</p>\';
    echo \'<p><input type="submit" name="submit" value="Send"/></p>\';
    echo \'</form>\';
}

function checkpoint_email() {
    global $wpdb;
    if(isset($_POST[\'submit\'])){
    $email = sanitize_email($_POST[\'email\']);
    if(!is_email($email)) {
        echo \'<div class="error"><p>Invalid e-mail!</p></div>\';
     }
    $datum = $wpdb->get_results("SELECT COUNT(*) FROM wp8p_users WHERE $current_user->user_email = $email");
    if($datum < 0) {
       echo "Email Verified";
    }
    else {
         echo "Email Not Verified";
    }   
}
}
function ec_shortcode() {
    ob_start();
    checkpoint_email();
    email_form_code();
    return ob_get_clean();
}
add_shortcode( \'av_email_cform\', \'ec_shortcode\' );
?>