PHP电子邮件包括但不显示内嵌图像

Question

它将编码图像包含在电子邮件中，但不会显示它。我得到的只是一个占位符。我知道这些库，但感觉就像我太近了:)

这是一个带有附件的html电子邮件，内嵌图像只是顶部的横幅。附件工作正常。

<?php

date_default_timezone_set('America/Chicago');
$heading_s_date = date("F j, Y",strtotime($start_date));  //to get format 2018-11-31 only
$heading_e_date = date("F j, Y",strtotime($end_date));    //to get format 2018-11-31 only
$subject = 'Account Updater Report for: ' . $merchant_name . '--' . $start_date . ' to ' . $end_date;; 
$random_hash = md5(date('r', time())); 
$headers = "From: customerservice@calligraphydallas.com
Reply-To: customerservice@forte.net"; 
$headers .= "
Content-Type: multipart/html; boundary="PHP-mixed-".$random_hash."""; 
$image = 'banner010.jpg';
$attachment = chunk_split(base64_encode(file_get_contents($filename)));
$inline = chunk_split(base64_encode(file_get_contents($image)));
ob_start();
?>

This is a multi-part message in MIME format.

--PHP-mixed-<?php echo $random_hash; ?>  
Content-Type: multipart/mixed; boundary="PHP-alt-<?php echo $random_hash; ?>" 

--PHP-alt-<?php echo $random_hash; ?>  
Content-Type: text/plain; charset="iso-8859-1" 
Content-Transfer-Encoding: 7bit

Here is your Account Updater report.

--PHP-alt-<?php echo $random_hash; ?>  
Content-Type: image/jpg; name="banner010.jpg"
Content-Transfer-Encoding: base64  
Content-ID: <image_identifier>
Content-Disposition: inline; filename="banner010.jpg"

<?php $headers .= $inline."
"; ?>  

--PHP-alt-<?php echo $random_hash; ?>  
Content-Type: text/html; charset="iso-8859-1" 
Content-Transfer-Encoding: 7bit

<a href="https://www.forte.net/"><img border="0" src="cid:image_identifier"></a><br>
<p><font face="Calibri"><span style="font-size: 15pt;"><b>Attached please find your Account Updater report.</b></span></font></p>

--PHP-alt-<?php echo $random_hash; ?>-- 

--PHP-mixed-<?php echo $random_hash; ?>  
Content-Type: application/text; name="<?php echo $filename; ?>"
Content-Transfer-Encoding: base64  
Content-Disposition: attachment 

--PHP-alt-<?php echo $random_hash; ?>  

<?php echo $attachment; ?> 
--PHP-mixed-<?php echo $random_hash; ?>-- 

<?php 
$message = ob_get_clean(); 
$mail_sent = @mail( $sendto, $subject, $message, $headers ); 
?>

任何帮助，将不胜感激。

Answer 1

另一答案