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How to attach file with feedback form in PHP ?

  • Last Updated : 29 Jan, 2020

Feedback form is used to get the review from the user through mail services. Mailing is one of the server-side utilities that is required in most of the web servers today. In PHP, mail() is the built-in function that is used to send emails from PHP scripts either in a plain-text form or formatted HTML. You can also write a script to attach any files into your mail from send Attachment With Email article.

The PHP mail function has the following basic Syntax:

mail($to_email_address, $subject, $message, [$headers], [$parameters]);

Attaching file in feedback form: To send an email with attachment as feedback, we need to use the multipart/mixed MIME type(set Content-type header to multipart/mixed) that specifies that mixed types will be included in the email. Moreover, we want to use a multipart/alternative MIME type to send both plain-text and HTML versions of the email. Text and attachment sections can be specified within boundaries. A boundary is started with two hyphens followed by a unique number that can not appear in the message part of the email. A PHP function md5() is used to create a 32 digit hexadecimal number to create a unique number. A final boundary denoting the email’s final section must also end with two hyphens.

To include an attachment to our message, we read the data from the specified file into a string, encode it with base64_encode() function for safer transmission, split it in smaller chunks with the chunk_split() function to make sure that it matches the MIME specifications and then include it as an attachment.


$Msg = '';
if(isset($_FILES["file"]["name"]) && isset($_POST['email'])) {
    $toemail = $_POST['email'];
    $name = $_POST['name'];
    $subject = $_POST['subject'];
    $message = $_POST['message'];
    $fromemail "";
    $msg = '<h2 style="color:green;">GeeksforGeeks</h2>
                    <p><b>Hello, '.$name.'</b></p></br>
    $msg = "Please find the attachment<br/>Thank You.";
    $s_m = md5(uniqid(time()));
    $headers = "From: ".$fromemail;
    $mime_boundary = "==Multipart_Boundary_x{$s_m}x";
    $headers .= "\nMIME-Version: 1.0\n" .
    "Content-Type: multipart/mixed;\n" .
    " boundary=\"{$mime_boundary}\"";
    if($_FILES["file"]["name"]!= ""){  
        $file_name = $_FILES["file"]["name"];  
        $content = chunk_split(base64_encode(
        $msg .= "This is a multi-part message in MIME format.\n\n" .
            "--{$mime_boundary}\n" .
            "Content-Type:text/html; charset=\"iso-8859-1\"\n" .
            "Content-Transfer-Encoding: 7bit\n\n" .
            $msg .= "\n\n";
        $msg .= "--{$mime_boundary}\n" .
            "Content-Type: application/octet-stream;\n" .
            " name=\"{$file_name}\"\n" .
            // "Content-Disposition: attachment;\n" .
            // " filename=\"{$fileatt_name}\"\n" .
            "Content-Transfer-Encoding: base64\n\n" .
            $content  .= "\n\n" .
    if(mail($toemail, $subject, $msg, $headers)){
        $Msg= "Email send successfully with attachment";
        $Msg= "Email Not sent";
<!DOCTYPE html>
    <title>Sending file attachment with email</title>
    <meta charset="utf-8">
    <meta name="viewport"
          content="width=device-width, initial-scale=1">
    <link rel="stylesheet" href=
    <script src=
    <script src=
    <script src=
        form {
            box-shadow: 10px 10px 40px grey;
            padding: 50px;
            margin: 20px;
    <?php if(!empty($Msg)){ ?>
        <p class="text-success text-center">
            <?php echo $Msg; ?>
    <?php } ?>
    <form method="post" action=""
            class="w-75 mx-auto">
        <h1 class="text-success text-center">
        <h5 class="text-success text-center">
            Sending email with a
            file attachment
        <div class="form-group">
            <input type="text" name="name"
                placeholder="Name" required="">
        <div class="form-group">
            <input type="email" name="email"
                placeholder="Email address" required="">
        <div class="form-group">
            <input type="text" name="subject"
                placeholder="Subject" required="">
        <div class="form-group">
            <textarea name="message"
                placeholder="Write your message here..."
        <div class="form-group">
            <input type="file" name="file">
        <div class="submit text-center">
            <input type="submit" name="submit"
                class="btn btn-success "
                value="SEND MESSAGE">


  • Feedback form GUI:
  • After receiving mail:

Using mail() on localhost on XAMPP: Sending mail from the localhost can be done using Sendmail package, Sendmail package is inbuild in XAMPP.

  • Step 1: In C:\xampp\php\php.ini find extension=php_openssl.dll and remove the semicolon from the beginning of that line to make SSL working for gmail for localhost.
  • Step 2: In php.ini file find [mail function] and change
    sendmail_from =
    sendmail_path = "\"C:\xampp\sendmail\sendmail.exe\" -t"
  • Step 3: In C:\xampp\sendmail\sendmail.ini. Replace all the existing code in sendmail.ini with following code:
  • Step 4: Change and gmail-password as required. Restart the server the XAMMP control panel so the changes take effect.
  • Step 5: Create a php file and send mail.

Note: However, the PHP mail() function is a part of the PHP core but you need to set up a mail server on your machine to make it really work.

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