问题
I have emails sent via base64 encoding and 8bit encoding. I was wondering how I could check the encoding of the message using imap_fetchstructure (been doing this for about two hours, so lost) and then decode it properly.
Gmail and Mailbox (app on iOS) are sending it as 8bit while Windows 8's Mail app is sending it as base64. Either way, I need to decode whether its 8bit or base64 by detecting what type of encoding it has used.
Using PHP 5.1.6 (yes, I should update, been busy).
I really have no code to show. This is all I have:
<?php
$hostname = '{********:993/imap/ssl}INBOX';
$username = '*********';
$password = '******';
$inbox = imap_open($hostname,$username,$password) or die('Cannot connect to server: ' . imap_last_error());
$emails = imap_search($inbox,'ALL');
if($emails) {
$output = '';
rsort($emails);
foreach($emails as $email_number) {
$overview = imap_fetch_overview($inbox,$email_number,0);
$message = imap_fetchbody($inbox,$email_number,2);
$struct = imap_fetchstructure($inbox, $email_number);
$output.= '<div class="toggle'.($overview[0]->seen ? 'read' : 'unread').'">';
$output.= '<span class="subject">'.$overview[0]->subject.'</span> ';
$output.= '<span class="from">'.$overview[0]->from.'</span>';
$output.= '<span class="date">on '.$overview[0]->date.'</span>';
$output.= '</div>';
/* output the email body */
$output.= '<div class="body">'.$message.'</div>';
}
echo $output;
}
imap_close($inbox);
?>
回答1:
imap_bodystruct() or imap_fetchstructure() should return this info to you. The following code should do exactly what you're looking for:
<?php
$hostname = '{********:993/imap/ssl}INBOX';
$username = '*********';
$password = '******';
$inbox = imap_open($hostname,$username,$password) or die('Cannot connect to server: ' . imap_last_error());
$emails = imap_search($inbox,'ALL');
if($emails) {
$output = '';
rsort($emails);
foreach($emails as $email_number) {
$overview = imap_fetch_overview($inbox,$email_number,0);
$structure = imap_fetchstructure($inbox, $email_number);
if(isset($structure->parts) && is_array($structure->parts) && isset($structure->parts[1])) {
$part = $structure->parts[1];
$message = imap_fetchbody($inbox,$email_number,2);
if($part->encoding == 3) {
$message = imap_base64($message);
} else if($part->encoding == 1) {
$message = imap_8bit($message);
} else {
$message = imap_qprint($message);
}
}
$output.= '<div class="toggle'.($overview[0]->seen ? 'read' : 'unread').'">';
$output.= '<span class="from">From: '.utf8_decode(imap_utf8($overview[0]->from)).'</span>';
$output.= '<span class="date">on '.utf8_decode(imap_utf8($overview[0]->date)).'</span>';
$output.= '<br /><span class="subject">Subject('.$part->encoding.'): '.utf8_decode(imap_utf8($overview[0]->subject)).'</span> ';
$output.= '</div>';
$output.= '<div class="body">'.$message.'</div><hr />';
}
echo $output;
}
imap_close($inbox);
?>
回答2:
You can look at this example.
Imap/Imap
Here's code snippet
switch ($encoding) {
# 7BIT
case 0:
return $text;
# 8BIT
case 1:
return quoted_printable_decode(imap_8bit($text));
# BINARY
case 2:
return imap_binary($text);
# BASE64
case 3:
return imap_base64($text);
# QUOTED-PRINTABLE
case 4:
return quoted_printable_decode($text);
# OTHER
case 5:
return $text;
# UNKNOWN
default:
return $text;
}
回答3:
Returned Objects for imap_fetchstructure()
- encoding (Body transfer encoding)
Transfer encodings (may vary with used library)
0 7BIT 1 8BIT 2 BINARY 3 BASE64 4 QUOTED-PRINTABLE 5 OTHER
$s = imap_fetchstructure($mbox,$mid);
if ($s->encoding==3)
$data = base64_decode($data);
回答4:
// Best for reading attached file from e-mail as well as body of the mail
$hostname = '{imap.gmail.com:993/imap/ssl}Inbox';
$username = 'xzy.xyz@xyz.com';
$password = '****************';
$inbox = imap_open($hostname,$username,$password) or die('Cannot connect to Gmail: ' . imap_last_error());
$emails = imap_search($inbox, 'SUBJECT "'.$subject.'"');
rsort($emails);
foreach ($emails as $key => $value) {
$overview = imap_fetch_overview($inbox,$value,0);
$message_date = new DateTime($overview[0]->date);
$date = $message_date->format('Ymd');
$message = imap_fetchbody($inbox,$value,2);
$structure = imap_fetchstructure($inbox, $value);
$attachments = [];
if(isset($structure->parts) && count($structure->parts))
{
for($i = 0; $i < count($structure->parts); $i++)
{
$attachments[$i] = array(
'is_attachment' => false,
'filename' => '',
'name' => '',
'attachment' => ''
);
if($structure->parts[$i]->ifdparameters)
{
foreach($structure->parts[$i]->dparameters as $object)
{
if(strtolower($object->attribute) == 'filename')
{
$attachments[$i]['is_attachment'] = true;
$attachments[$i]['filename'] = $object->value;
}
}
}
if($structure->parts[$i]->ifparameters)
{
foreach($structure->parts[$i]->parameters as $object)
{
if(strtolower($object->attribute) == 'name')
{
$attachments[$i]['is_attachment'] = true;
$attachments[$i]['name'] = $object->value;
}
}
}
if($attachments[$i]['is_attachment'])
{
$attachments[$i]['attachment'] = imap_fetchbody($inbox, $value, $i+1);
if($structure->parts[$i]->encoding == 3) //3 = BASE64 encoding
{
$attachments[$i]['attachment'] = base64_decode($attachments[$i]['attachment']);
}
elseif($structure->parts[$i]->encoding == 4) //4 = QUOTED-PRINTABLE encoding
{
$attachments[$i]['attachment'] = quoted_printable_decode($attachments[$i]['attachment']);
}
}
}
}
}
imap_close($inbox);//Never forget to close the connection
来源：https://stackoverflow.com/questions/15539902/php-imap-decoding-messages