[PHP] risolvere problema Undefined variable

[luigi777]

Salve, è possibile risolvere i problemi Undefined variable delle variabili:
avete idea come mettere un isset a form_data?
e result, sent, info.

grazie mille e aspetto vostre risposte e vi auguro una buona settimana.

ecco i listati:

Notice: Undefined variable: result in D:\www\xxx\wp-content\plugins\wptuts-contact-form\contactform.php on line 71

Notice: Undefined variable: form_data in D:\www\xxx\wp-content\plugins\wptuts-contact-form\contactform.php on line 77

Notice: Undefined variable: form_data in D:\www\xxxx\wp-content\plugins\wptuts-contact-form\contactform.php on line 81

Notice: Undefined variable: form_data in D:\www\xxx\wp-content\plugins\wptuts-contact-form\contactform.php on line 85

Notice: Undefined variable: form_data in D:\www\xxx\wp-content\plugins\wptuts-contact-form\contactform.php on line 89

Notice: Undefined variable: sent in D:\www\xxx\wp-content\plugins\wptuts-contact-form\contactform.php on line 96

Notice: Undefined variable: info in D:\www\xxx\wp-content\plugins\wptuts-contact-form\contactform.php on line 99

<?php
/*
Plugin Name: Simple Contact Form Shortcode
Version: 1.0

*/
// function to get the IP address of the user
function get_the_ip() {
    if (isset($_SERVER["HTTP_X_FORWARDED_FOR"])) {
        return $_SERVER["HTTP_X_FORWARDED_FOR"];
    }
    elseif (isset($_SERVER["HTTP_CLIENT_IP"])) {
        return $_SERVER["HTTP_CLIENT_IP"];
    }
    else {
        return $_SERVER["REMOTE_ADDR"];
    }
}

// the shortcode
function contact_form_sc($atts) {
    extract(shortcode_atts(array(
        "email" => get_bloginfo('admin_email'),
        "subject" => '',
        "label_name" => 'Your Name',
        "label_email" => 'Your E-mail Address',
        "label_subject" => 'Subject',
        "label_message" => 'Your Message',
        "label_submit" => 'Submit',
        "error_empty" => 'Please fill in all the required fields.',
        "error_noemail" => 'Please enter a valid e-mail address.',
        "success" => 'Thanks for your e-mail! We\'ll get back to you as soon as we can.'
    ), $atts));

    if ($_SERVER['REQUEST_METHOD'] == 'POST') {
        $error = false;
        $required_fields = array("your_name", "email", "message", "subject");

        foreach ($_POST as $field => $value) {
            if (get_magic_quotes_gpc()) {
                $value = stripslashes($value);
            }
            $form_data[$field] = strip_tags($value);
        }

        foreach ($required_fields as $required_field) {
            $value = trim($form_data[$required_field]);
            if(empty($value)) {
                $error = true;
                $result = $error_empty;
            }
        }

        if(!is_email($form_data['email'])) {
            $error = true;
            $result = $error_noemail;
        }

        if ($error == false) {
            $email_subject = "[" . get_bloginfo('name') . "] " . $form_data['subject'];
            $email_message = $form_data['message'] . "\n\nIP: " . get_the_ip();
            $headers  = "From: ".$form_data['your_name']." <".$form_data['email'].">\n";
            $headers .= "Content-Type: text/plain; charset=UTF-8\n";
            $headers .= "Content-Transfer-Encoding: 8bit\n";
            wp_mail($email, $email_subject, $email_message, $headers);
            $result = $success;
            $sent = true;
        }
    }

    if($result != "") {
        $info = '<div class="info">'.$result.'</div>';
    }
    $email_form = '<form class="contact-form" method="post" action="'.get_permalink().'">
        <div>
            <label for="cf_name">'.$label_name.':</label>
            <input type="text" name="your_name" id="cf_name" size="50" maxlength="50" value="'.$form_data['your_name'].'" />
        </div>
        <div>
            <label for="cf_email">'.$label_email.':</label>
            <input type="text" name="email" id="cf_email" size="50" maxlength="50" value="'.$form_data['email'].'" />
        </div>
        <div>
            <label for="cf_subject">'.$label_subject.':</label>
            <input type="text" name="subject" id="cf_subject" size="50" maxlength="50" value="'.$subject.$form_data['subject'].'" />
        </div>
        <div>
            <label for="cf_message">'.$label_message.':</label>
            <textarea name="message" id="cf_message" cols="50" rows="15">'.$form_data['message'].'</textarea>
        </div>
        <div>
            <input type="submit" value="'.$label_submit.'" name="send" id="cf_send" />
        </div>
    </form>';
   
    if($sent == true) {
        return $info;
    } else {
        return $info.$email_form;
    }
} add_shortcode('contact', 'contact_form_sc');

?>