multiple emails attachment are not working

i am trying to send multiple email same time. it works sometime it not.

Help me ....

# DYNAMICALLY GET ALL ATTACHMENTS   
    for($i=1;$i<count($_FILES)+1; $i++){
        if(!empty($_FILES['atachment'.$i]['tmp_name'])){
            $file_name = $_FILES['atachment'.$i]['name'];
            $temp_name = $_FILES['atachment'.$i]['tmp_name'];
            $file_location = $_FILES['atachment'.$i]['tmp_name'];
            $filetype = $_FILES['atachment'.$i]['type'];
            move_uploaded_file($temp_name,'temp_upload/'.$file_name);   
            $files[] = 'temp_upload/'.$file_name;
        }
    }

    # EMAIL SETTING
    $headers = "From:$from";

    $semi_rand = md5(time());
    $mime_boundary = "==Multipart_Boundary_x{$semi_rand}x";

    // headers for attachment
    $headers .= "\nMIME-Version: 1.0\n" . "Content-Type: multipart/mixed;\n" . " boundary=\"开发者_如何转开发{$mime_boundary}\"";

    // multipart boundary
    $message = "This is a multi-part message in MIME format.\n\n" . "–{$mime_boundary}\n" . "Content-Type: text/plain; charset=\"iso-8859-1\"\n" . "Content-Transfer-Encoding: 7bit\n\n" . $message . "\n\n"; 

    # PREPARE ATTACMENTS
    for($x=0;$x<count($files);$x++){
        $file = fopen($files[$x],"rb");
        $data = fread($file,filesize($files[$x]));
        fclose($file);
        $data = chunk_split(base64_encode($data));
        $message .= "Content-Type: {\"application/octet-stream\"};\n" . " name=\"$files[$x]\"\n" .
        "Content-Disposition: attachment;\n" . " filename=\"$files[$x]\"\n" .
        "Content-Transfer-Encoding: base64\n\n" . $data . "\n\n";
        $message .= "–{$mime_boundary}–\n";
    }

    # CHECK IF SEND FUNCTION
    $ok = @mail($to, $subject, $message, $headers); 
    if ($ok) { 
        echo "<p>mail sent to $to!</p>"; 
    } else { 
        echo "<p>mail could not be sent!</p>"; 
    } enter code here

doing wrong thing here:

// multipart boundary
$message = "This is a multi-part message in MIME format.\n\n" . "–{$mime_boundary}\n" . "Content-Type: text/plain; charset=\"iso-8859-1\"\n" . "Content-Transfer-Encoding: 7bit\n\n" . $message . "\n\n"; 

must be used as:

// multipart boundary
$message = "–{$mime_boundary}\n" . "Content-Type: text/plain; charset=\"iso-8859-1\"\n" . "Content- Transfer-Encoding: 7bit\n\n" . "This is a multi-part message in MIME format.\n\n" . 

If you want to know exact working then kindly read the MIME Specification for sending email here and here

I don't know PHP but it looks like you are trying to attach multiple files at once. In Visual Basic you are required to attach files one at a time. Try using a loop to attach one file at a time until all files are attached. Again, i don't know PHP though so this is pure speculation from what i know in Visual Basic