PHP 电子邮件包括但不显示内联图像

Question

它在电子邮件中包含编码图像，但不会显示它。我得到的只是一个占位符。我知道图书馆，但感觉我太接近了:)

这是一封 html 电子邮件，带有附件，内联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\r\nReply-To: customerservice@forte.net"; 
$headers .= "\r\nContent-Type: multipart/html; boundary=\"PHP-mixed-".$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."\r\n"; ?>  

--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 ); 
?>

如有任何帮助，我们将不胜感激。

Answer 1

以下是使用 URL 引用图像的方法：

<?php

date_default_timezone_set('America/Chicago');
$heading_s_date = date("F j, Y",strtotime($start_date));
$heading_e_date = date("F j, Y",strtotime($end_date));
$subject = 'Account Updater Report for: ' . $merchant_name . '--' . $start_date . ' to ' . $end_date;; 
$random_hash = md5(date('r', time())); 
$headers = "From: customerservice@calligraphydallas.com\r\nReply-To: customerservice@forte.net"; 
$headers .= "\r\nContent-Type: multipart/mixed; boundary=\"PHP-mixed-".$random_hash."\""; 
$attachment = chunk_split(base64_encode(file_get_contents($filename))); 
ob_start();
?>
--PHP-mixed-<?php echo $random_hash; ?>  
Content-Type: multipart/alternative; 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: text/html; charset="iso-8859-1" 
Content-Transfer-Encoding: 7bit

<a href="https://www.forte.net/"><img border="0" src="http://www.calligraphydallas.com/updater/banner02.png" alt="Forte Payment Systems" width="804" height="166"></a><br>
<p><font face="Calibri"><span style="font-size: 15pt;"><b>Attached please find your Account Updater report.</b></span></font></p>
<p><font face="Calibri"><span style="font-size: 12pt;">For: <?php echo $merchant_name?></span></font><br>
<font face="Calibri"><span style="font-size: 12pt;"><?php echo $heading_s_date . ' to ' . $heading_e_date; ?></span></font><br>
<font face="Calibri"><span style="font-size: 12pt;">Created on: <?php echo date("F j, Y") . ' at ' . date("g:i a"); ?> CST</span></font><br><br>
<font face="Calibri"><span style="font-size: 13pt;"><b>Forte Customer Service:</b></span><br>
<span style="margin-left:50px; font-size:12pt;">7:00 am - 7:00 pm CST</span><br>
<span style="margin-left:50px; font-size:12pt;">866.290.5400 option 1</span><br>
<span style="margin-left:50px; font-size:12pt;">customerservice@forte.net</span></font></p>
<p>&nbsp;</p>
<p>&nbsp;</p>
<p>&nbsp;</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 echo $attachment; ?> 
--PHP-mixed-<?php echo $random_hash; ?>-- 

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

Answer 2

天哪，我成功了哈哈

<?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\r\nReply-To: customerservice@forte.net"; 
$headers .= "\r\nContent-Type: multipart/mixed; boundary=\"PHP-mixed-".$random_hash."\""; 
$image = 'banner02.png';
$attachment = chunk_split(base64_encode(file_get_contents($filename))); 
$banner = chunk_split(base64_encode(file_get_contents($image))); 
ob_start();
?>
--PHP-mixed-<?php echo $random_hash; ?>  
Content-Type: multipart/related; boundary="PHP-rel-<?php echo $random_hash; ?>"  

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

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

Here is your Account Updater report.  

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

<a href="https://www.forte.net/"><img border="0" src="cid:image_identifier" title="Forte Payment Systems" alt="Forte Payment Systems" width="804" height="166"></a><br>
<p><font face="Calibri"><span style="font-size: 15pt;"><b>Attached please find your Account Updater report.</b></span></font></p>
<p><font face="Calibri"><span style="font-size: 12pt;">For: <?php echo $merchant_name?></span></font><br>
<font face="Calibri"><span style="font-size: 12pt;"><?php echo $heading_s_date . ' to ' . $heading_e_date; ?></span></font><br>
<font face="Calibri"><span style="font-size: 12pt;">Created on: <?php echo date("F j, Y") . ' at ' . date("g:i a"); ?> CST</span></font><br><br>
<font face="Calibri"><span style="font-size: 13pt;"><b>Forte Customer Service:</b></span><br>
<span style="margin-left:50px; font-size:12pt;">7:00 am - 7:00 pm CST</span><br>
<span style="margin-left:50px; font-size:12pt;">866.290.5400 &nbsp;option 1</span><br>
<span style="margin-left:50px; font-size:12pt;"><a href="mailto:customerservice@forte.net">customerservice@forte.net</a></span></font><br>
<span style="margin-left:50px; font-size:12pt;"><a href="https://www.forte.net/">www.forte.net</a></span></font></p>
<p>&nbsp;</p>
<p>&nbsp;</p>
<p>&nbsp;</p>
<p>&nbsp;</p>
<p>&nbsp;</p>

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

--PHP-rel-<?php echo $random_hash; ?>  
Content-Type: image/png;
 name="banner02.png"  
Content-Transfer-Encoding: base64  
Content-ID: <image_identifier>  
Content-Disposition: inline;
 filename="banner02.png"  

<?php echo $banner; ?>

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

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

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