Intenta comprender el código bien previamente a adaptarlo a tu trabajo si tquieres aportar algo puedes compartirlo con nosotros.

Solución:

No está proporcionando el número de sección correcto para los archivos adjuntos anidados. Debe pasar el número de sección en el paso recursivo.

function parse_parts($parts, $parentsection = "")
    foreach($parts as $subsection => $part)
        $section = $parentsection . ($subsection + 1);
        if(isset($part->parts))

            // some mails have one extra dimension
            $this->parse_parts($part->parts, $section . "." );

        
        elseif(isset($part->disposition))
            if(in_array(strtolower($part->disposition), array('attachment','inline')))
                $data = imap_fetchbody($this->stream, $this->msgno, $section );
                echo 'Getting section ' . $section;
                echo $part->dparameters[0]->value.' '.strlen($data)."n";
            
        
    

(No probado, pero debería hacer lo correcto …)

El siguiente código le muestra los directorios y el correo electrónico en el INBOX

    $mailbox = imap_open ("correo.servidor.com:993/imap/ssl/novalidate-certINBOX", "[email protected]", "PASSWORD");

    if (!$mailbox)
        die('murio');
    

    echo "
Buzones
n";
    $carpetas = imap_listmailbox($mailbox, "correo.patronato.unam.mx:993", "*");

    if ($carpetas == false) 
        echo "Llamada fallida
n";
     else 
        foreach ($carpetas as $val) 
            echo $val . "
n";
        
    

    echo "
Cabeceras en INBOX
n";
    $cabeceras = imap_headers($mailbox);

    if ($cabeceras == false) 
        echo "Llamada fallida
n";
     else 
        foreach ($cabeceras as $val) 
            echo $val . "
n";
        
    



    $numMessages = imap_num_msg($mailbox);
    for ($i = $numMessages; $i > 0; $i--) 
        $header = imap_header($mailbox, $i);

        $fromInfo = $header->from[0];
        $replyInfo = $header->reply_to[0];

        // print_r($header);

        $details = array(
            "fromAddr" => (isset($fromInfo->mailbox) && isset($fromInfo->host))
                ? $fromInfo->mailbox . "@" . $fromInfo->host : "",
            "fromName" => (isset($fromInfo->personal))
                ? $fromInfo->personal : "",
            "replyAddr" => (isset($replyInfo->mailbox) && isset($replyInfo->host))
                ? $replyInfo->mailbox . "@" . $replyInfo->host : "",
            "replyName" => (isset($replyTo->personal))
                ? $replyto->personal : "",
            "subject" => (isset($header->subject))
                ? $header->subject : "",
            "udate" => (isset($header->udate))
                ? $header->udate : "",
            "Unseen" => (isset($header->Unseen))
                ? $header->Unseen  : "-"
        );
        $uid = imap_uid($mailbox, $i);

        echo "
";
        echo "
From:" . $details["fromName"];
        echo " " . $details["fromAddr"] . "
";
        echo "
Subject: " . $details["subject"] . "
";
        echo "
Estatus: " . $details["Unseen"] . "
";
        echo '
Read
';
        echo "
";
    


    imap_close($mailbox);

El código test_imap_attachment.php que muestra los archivos adjuntos

function getAttachments($imap, $mailNum, $part, $partNum) 
    $attachments = array();

    if (isset($part->parts)) 
        foreach ($part->parts as $key => $subpart) 
            if($partNum != "") 
                $newPartNum = $partNum . "." . ($key + 1);
            
            else 
                $newPartNum = ($key+1);
            
            $result = getAttachments($imap, $mailNum, $subpart,
                $newPartNum);
            if (count($result) != 0) 
                 array_push($attachments, $result);
             
        
    
    else if (isset($part->disposition)) 
        // print_r($part);
        if (strtoupper($part->disposition) == "ATTACHMENT") 
            $partStruct = imap_bodystruct($imap, $mailNum, $partNum);
            $attachmentDetails = array(
                "name"    => $part->dparameters[0]->value,
                "subtype" => $partStruct->subtype,
                "partNum" => $partNum,
                "enc"     => $partStruct->encoding
            );
            return $attachmentDetails;
        
    

    return $attachments;


$mailbox = imap_open ("correo.servidor.com:993/imap/ssl/novalidate-certINBOX", "[email protected]", "PASSWORD");

$uid = $_GET['uid'];

$mailStruct = imap_fetchstructure($mailbox, $uid);

$attachments = getAttachments($mailbox, $uid, $mailStruct, "");

echo "Attachments: ";
echo "
";
foreach ($attachments as $attachment)   
    echo '
' .
        $attachment["name"] . "
";

echo "
";

El siguiente código guarda el archivo en el mismo servidor: test_imap_download.php

function downloadAttachment($imap, $uid) 
    $structure = imap_fetchstructure($imap, $uid);
    $attachments = '';
    if(isset($structure->parts) && count($structure->parts)) 
        for($i=0; $iparts); $i++) 
            if(strtoupper($structure->parts[$i]->disposition) == 'ATTACHMENT') 

                $attachments[$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($imap, $uid, $i+1);
                    if($structure->parts[$i]->encoding == 3)  // 3 = BASE64
                        $attachments[$i]['attachment'] = base64_decode($attachments[$i]['attachment']);
                    elseif($structure->parts[$i]->encoding == 4)  // 4 = QUOTED-PRINTABLE
                        $attachments[$i]['attachment'] = quoted_printable_decode($attachments[$i]['attachment']);
                    
                

                file_put_contents('directorio/'.$attachments[$i]['filename'], $attachments[$i]['attachment']);

            
         
    
   

$mailbox = imap_open ("correo.servidor.com:993/imap/ssl/novalidate-certINBOX", "[email protected]", "PASSWORD");


$uid        = $_GET["uid"];
$partNum    = $_GET["partNum"];

downloadAttachment($mailbox, $uid);

He usado código de estas páginas:

http://www.sitepoint.com/exploring-phps-imap-library-2/

La descarga de archivos adjuntos al directorio con IMAP en PHP funciona de forma aleatoria

Puedes auxiliar nuestro ensayo añadiendo un comentario o valorándolo te lo agradecemos.

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