Salve a tutti, sono riuscito ad inviare una mail con oggetto e testo verso un destinatario. Ora manca solo l inserimento dell allegato che carico in un form. Posto il codice

Codice PHP:
 $to = "info@danielebarisano.it";                                                             $htmlContent1='<html> <body><div style="width:600px;margin:0 auto;padding:30px 20px;border-radius:10px; border:1px solid yellow;">        <center style="font:18px calibri;color:#333; background:yellow;margin:-30px -17px 0px -17px;">Prova</center> <br/><br/>       <strong style="margin: 0 100px 0 30px;font-size:14px; font-family: sans-serif;"> Nome: <strong style=" font-size:16px; color:#BAAC8F;">'.$name.'</strong>  <br>        <strong style="margin: 0 100px 0 30px;font-size:14px; font-family: sans-serif;"> Email: <strong style=" font-size:16px; color:#BAAC8F;">'.$email.'</strong>  <br>        <strong style="margin: 0 100px 0 30px;font-size:14px; font-family: sans-serif;"> File: <strong style=" font-size:16px; color:#BAAC8F;">'.$uploadedFile.'</strong>  <br>                </div>        </body>       </html>';                           // Set content-type for sending HTML email                    /*$headers = "MIME-Version: 1.0" . "\r\n";                    $headers .= "Content-type:text/html;charset=UTF-8" . "\r\n";                    $headers .= "From:$email";*/ 
                    $file_name = $_FILES['file']['name'];                      $temp_name = $_FILES['file']['tmp_name'];                      $file_type = $_FILES['file']['type'];                     $base = basename($file_name);                    $extension = substr($base, strlen($base)-4, strlen($base));                     //only these file types will be allowed                    $allowed_extensions = array(".doc", "docx", ".pdf", ".zip", ".png",".jpg");                     //check that this file type is allowed                    if(in_array($extension,$allowed_extensions)) {                        //mail essentials                        $from = $email;                        $to = "info@danielebarisano.it";                          //things u need                        $file = $temp_name;                        $content = chunk_split(base64_encode(file_get_contents($file)));                        $uid = md5(uniqid(time()));  //unique identifier                         //standard mail headers                        $header = "From: ".$email."\r\n";                        $header .= "Reply-To: ".$replyto. "\r\n";                        $header .= "MIME-Version: 1.0\r\n";                          //declare multiple kinds of email (plain text + attch)                        $header .="Content-Type: multipart/mixed; boundary=\"".$uid."\"\r\n";                        $header .="This is a multi-part message in MIME format.\r\n";                         //plain txt part                         $header .= "--".$uid."\r\n";                        $header .= "Content-type:text/plain; charset=iso-8859-1\r\n";                        $header .= "Content-Transfer-Encoding: 7bit\r\n";                        $header .= $message. "\r\n";                          //attch part                        $header .= "--".$uid."\r\n";                        $header .= "Content-Type: ".$file_type."; name=\"".$file_name."\"\r\n";                        $header .= "Content-Transfer-Encoding: base64\r\n";                        $header .= "Content-Disposition: attachment; filename=\"".$file_name."\"\r\n";                        $header .= $content."\r\n";  //chucked up 64 encoded attch                         //sending the mail - message is not here, but in the header in a multi part                         if(mail($to, 'Inserimento', $htmlContent1, $header)) {                            echo "success";                        }else {                            echo "fail";                        }                                }else {                        echo "file type not allowed";                        } 
codice HTML:
<form id="fupForm" action="submit.php" method="POST" enctype="multipart/form-data">            <div class="form-group">                <label for="name">Name</label>                <input type="text" class="form-control" id="name" name="name" placeholder="Enter name" required />            </div>            <div class="form-group">              <label for="email">Email</label>                <input type="email" class="form-control" id="email" name="email" placeholder="Enter email" required />            </div>            <div class="form-group">                <label for="file">File</label>                <input type="file" class="form-control" id="file" name="file" required />            </div>            <input type="submit" name="submit" class="btn btn-success submitBtn" value="SUBMIT"/>        </form>
L errore sulla pagina PHP è questo file_get_contents(/tmp/phpGmaZM8): failed to open stream: No such file or directory e avviene in questa riga:
Codice PHP:
$content = chunk_split(base64_encode(file_get_contents($file))); 
Chi sa darmi una mano?