send email with attachment in php without saving the file to webserver

Question

I am creating a simple form that let user "upload" a file, and a comments box. after the user choose the file(can be image or pdf) and click submit, i am not gonna store the file into my web server, the file will be inserted into an email and send to me.

my question is: how can i attach the file without storing it in any place.

I don't want to use third party module.

Update:

$attachment = $_FILES["OrderList"]["tmp_name"];
$content = file_get_contents($attachment);
$content = chunk_split(base64_encode($content));

I got an error:

Filename cannot be empty in C:\dir\orders\upload.php on line 24

line 24 is $content = file_get_contents($attachment);

Answer 1

Today i ran into similar situation and found a solution , so here it is

if ($_FILES["file"]["error"] > 0) {
echo "Error: " . $_FILES["file"]["error"] . "<br>";
} else {


$temp = explode(".", $_FILES["file"]["name"]);
$extension = end($temp);
$newname= $_FILES["file"]["tmp_name"].".".$extension;
rename($_FILES["file"]["tmp_name"],$newname);
$attachments = array( $newname );

   wp_mail('emailto send', 'title', 'message','',$attachments );
}

Answer 2

You have already stored it when you accept the file-upload from PHP.

Simply use it when it is stored in the tmp folder.

PHP will automagically delete it for you when your script ends.