Send Multiple File Attachments with Email in PHP
Introduction
When dealing with email communication involving the transfer of documents, you may occasionally need to attach multiple files rather than just a single one. PHP provides a robust platform for handling such email operations.
Understanding the Original Code
The original code you provided successfully sends a single file attachment. However, to attach multiple files, certain modifications are necessary.
Solution: Enhancements for Multiple File Attachment
The improved code below enables the sending of multiple files as attachments:
<code class="php"><form action="#" method="POST" enctype="multipart/form-data" >
<input type="file" name="csv_file[]" />
<br/>
<input type="file" name="csv_file[]" />
<br/>
<input type="file" name="csv_file[]" />
<br/>
<input type="submit" name="upload" value="Upload" />
<br/>
</form>
<?php
if ($_POST) {
$csv_files = array();
$files = array();
for ($i=0; $i < count($_FILES['csv_file']['name']); $i++){
$csv_files[] = $_FILES['csv_file']['name'][$i];
}
// array with filenames to be sent as attachments
$files = $csv_files;
// email fields: to, from, subject, and so on
$to = "[email protected]";
$from = "[email protected]";
$subject = "My subject";
$message = "My message";
$headers = "From: $from";
// boundary
$semi_rand = md5(time());
$mime_boundary = "==Multipart_Boundary_x{$semi_rand}x";
// headers for attachment
$headers .= "\nMIME-Version: 1.0\n" . "Content-Type: multipart/mixed;\n" . " boundary=\"{$mime_boundary}\"";
// multipart boundary
$message = "This is a multi-part message in MIME format.\n\n" . "--{$mime_boundary}\n" . "Content-Type: text/plain; charset=\"iso-8859-1\"\n" . "Content-Transfer-Encoding: 7bit\n\n" . $message . "\n\n";
$message .= "--{$mime_boundary}\n";
// preparing attachments
for($x=0;$x<count($files);$x++){
$file = fopen($files[$x],"rb");
$data = fread($file,filesize($files[$x]));
fclose($file);
$data = chunk_split(base64_encode($data));
$message .= "Content-Type: {\"application/octet-stream\"};\n" . " name=\"$files[$x]\"\n" .
"Content-Disposition: attachment;\n" . " filename=\"$files[$x]\"\n" .
"Content-Transfer-Encoding: base64\n\n" . $data . "\n\n";
$message .= "--{$mime_boundary}\n";
}
// send
$ok = @mail($to, $subject, $message, $headers);
if ($ok) {
echo "<p>mail sent to $to!</p>";
} else {
echo "<p>mail could not be sent!</p>";
}
}
?></code>
Explanation:
- The form (
- The loop iterates over uploaded files, capturing their names into the $csv_files array.
- The $files array is populated with filenames to be attached.
- The email body is multipart, containing text and attachments separated by boundaries (--{$mime_boundary}).
- Each attached file has a unique Content-Disposition to specify its filename and type.
- The email sends successfully with attachments if $ok is true.
The above is the detailed content of How to Send Multiple File Attachments with Email in PHP?. For more information, please follow other related articles on the PHP Chinese website!
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