phpmailer auto include local images - php

Question

I'm currently busy with phpmailer and wondered how to automatically embed local images in my email using a script. My idea was to upload a html file and a folder containing images and let a script replace the <img src tags to the cid ones.
Now what I got so far is:
$mail = new PHPMailer(true);
$mail->IsSendmail();
$mail->IsHTML(true);
try
{
$mail->SetFrom($from);
$mail->AddAddress($to);
$mail->Subject = $subject;
$mail->Body = embed_images($message, $mail);
$mail->Send();
}
Now I've got this incomplete function that scans the html body and replace the src tags:
function embed_images(&$body, $mailer)
{
// get all img tags
preg_match_all('/<img.*?>/', $body, $matches);
if (!isset($matches[0])) return;
$i = 1;
foreach ($matches[0] as $img)
{
// make cid
$id = 'img'.($i++);
// now ?????
}
$mailer->AddEmbeddedImage('i guess something with the src here');
$body = str_replace($img, '<img alt="" src="cid:'.$id.'" style="border: none;" />', $body);
}
I'm not sure what I should do here, do you retrieve the src and replace it with cid:$id ?
As they are local images i do not have the trouble of web src links or whatever...

Answer 1

You got the right approach
function embed_images(&$body,$mailer){
// get all img tags
preg_match_all('/<img[^>]*src="([^"]*)"/i', $body, $matches);
if (!isset($matches[0])) return;
foreach ($matches[0] as $index=>$img)
{
// make cid
$id = 'img'.$index;
$src = $matches[1][$index];
// now ?????
$mailer->AddEmbeddedImage($src,$id);
//this replace might be improved
//as it could potentially replace stuff you dont want to replace
$body = str_replace($src,'cid:'.$id, $body);
}
}

Answer 2

Why don't you embed the images directly in the HTML in base64?
You just have to convert your images in base64, and then include them like this:
<img src="data:image/jpg;base64,---base64_data---" />
<img src="data:image/png;base64,---base64_data---" />
I don't know if this is relevant in your case or not, but I hope it helps.

Answer 3

function embed_images(&$body, $mailer) {
// get all img tags
preg_match_all('/<img[^>]*src="([^"]*)"/i', $body, $matches);
if (!isset($matches[0]))
return;
foreach ($matches[0] as $index => $img) {
$src = $matches[1][$index];
if (preg_match("/\.jpg/", $src)) {
$dataType = "image/jpg";
} elseif (preg_match("/\.png/", $src)) {
$dataType = "image/jpg";
} elseif (preg_match("/\.gif/", $src)) {
$dataType = "image/gif";
} else {
// use the oldfashion way
$id = 'img' . $index;
$mailer->AddEmbeddedImage($src, $id);
$body = str_replace($src, 'cid:' . $id, $body);
}
if($dataType) {
$urlContent = file_get_contents($src);
$body = str_replace($src, 'data:'. $dataType .';base64,' . base64_encode($urlContent), $body);
}
}
}