Anda mungkin tahu bagaimana cara mengirim email dengan PHP menggunakan php mail(), hanya membutuhkan beberapa baris kode, tapi sedikit rumit ketika Anda ingin mengirim lampiran dengan email di PHP. Jadi, hari ini kita akan belajar bagaimana mengirim email dengan lampiran menggunakan PHP email.

Buatlah Form HTML dengan field file input mirip seperti di bawah ini. Untuk mengirimkan data ke web server (proses upload), pada tag form dari HTML perlu ditambahkan sebuah atribut enctype dengan nilai multipart/form-data. Atribut ini menginstruksikan kepada web server bahwa data yang dikirim berisi file yang diupload. Selain itu proses pengiriman harus menggunakan method=”POST”. 

<form enctype="multipart/form-data" method="POST" action="">
    <label>Your Name <input type="text" name="sender_name" /> </label> 
    <label>Your Email <input type="email" name="sender_email" /> </label> 
    <label>Subject <input type="text" name="subject" /> </label> 
    <label>Message <textarea name="message"></textarea> </label> 
    <label>Attachment <input type="file" name="my_file" /></label>
    <label><input type="submit" name="button" value="Submit" /></label>
</form>

Berikut kode PHP untuk mengirim lampiran email.

if($_POST && isset($_FILES['my_file']))
{

    $from_email         = 'noreply@your_domain.com'; //from mail, it is mandatory with some hosts
    $recipient_email    = 'my_email@your_domain.com'; //recipient email (most cases it is your personal email)
    
    //Capture POST data from HTML form and Sanitize them, 
    $sender_name    = filter_var($_POST["sender_name"], FILTER_SANITIZE_STRING); //sender name
    $reply_to_email = filter_var($_POST["sender_email"], FILTER_SANITIZE_STRING); //sender email used in "reply-to" header
    $subject        = filter_var($_POST["subject"], FILTER_SANITIZE_STRING); //get subject from HTML form
    $message        = filter_var($_POST["message"], FILTER_SANITIZE_STRING); //message
    
    /* //don't forget to validate empty fields 
    if(strlen($sender_name)<1){
        die('Name is too short or empty!');
    } 
    */
    
    //Get uploaded file data
    $file_tmp_name    = $_FILES['my_file']['tmp_name'];
    $file_name        = $_FILES['my_file']['name'];
    $file_size        = $_FILES['my_file']['size'];
    $file_type        = $_FILES['my_file']['type'];
    $file_error       = $_FILES['my_file']['error'];

    if($file_error > 0)
    {
        die('Upload error or No files uploaded');
    }
    //read from the uploaded file & base64_encode content for the mail
    $handle = fopen($file_tmp_name, "r");
    $content = fread($handle, $file_size);
    fclose($handle);
    $encoded_content = chunk_split(base64_encode($content));

        $boundary = md5("sanwebe");
        //header
        $headers = "MIME-Version: 1.0\r\n"; 
        $headers .= "From:".$from_email."\r\n"; 
        $headers .= "Reply-To: ".$reply_to_email."" . "\r\n";
        $headers .= "Content-Type: multipart/mixed; boundary = $boundary\r\n\r\n"; 
        
        //plain text 
        $body = "--$boundary\r\n";
        $body .= "Content-Type: text/plain; charset=ISO-8859-1\r\n";
        $body .= "Content-Transfer-Encoding: base64\r\n\r\n"; 
        $body .= chunk_split(base64_encode($message)); 
        
        //attachment
        $body .= "--$boundary\r\n";
        $body .="Content-Type: $file_type; name=".$file_name."\r\n";
        $body .="Content-Disposition: attachment; filename=".$file_name."\r\n";
        $body .="Content-Transfer-Encoding: base64\r\n";
        $body .="X-Attachment-Id: ".rand(1000,99999)."\r\n\r\n"; 
        $body .= $encoded_content; 
    
    $sentMail = @mail($recipient_email, $subject, $body, $headers);
    if($sentMail) //output success or failure messages
    {       
        die('Thank you for your email');
    }else{
        die('Could not send mail! Please check your PHP mail configuration.');  
    }

}

Saya berharap kode ini akan berguna dalam proyek PHP Anda. Semoga berhasil!