Question

I have a MySQL table in which some data blob data is stored in a cell.

I tried to echo it.

But I don’t know about the mime type of that data. How do I decide the mime type from the given blob data?

I tried this code but don’t know about the mime type of blob:

<?php

    mysql_connect("localhost","root","");
    mysql_select_db("contents");
    $sql="SELECT * FROM `contents` limit 1";
    $result=mysql_query($sql);
    $row=mysql_fetch_assoc($result);
    echo $row['html']

?>

Answer 1

You must add mime with insert “blob” in db for if you force ,you can choose this way :

if (!function_exists('mime_content_type ')) {
    function mime_content_type($filename) {
        $finfo    = finfo_open(FILEINFO_MIME);
        $mimetype = finfo_file($finfo, $filename);
        finfo_close($finfo);
        return $mimetype;
    }
}

$filename = tempnam('/tmp', 'cre');
$fp = fopen($filename, 'w'); 
fwrite($fp, $row['html']);
fclose($fp); 

$ctype = mime_content_type($filename) ;


header("Content-Type: $ctype");
header("Content-Disposition: attachment; filename=\"".'samename'."\";" );
header("Content-Transfer-Encoding: binary");
header("Content-Length: ".filesize($filename)); 
unlink($filename);
echo $row['html'];

This way is not good , because have many usage , but is possible.
I offer you update table and add mime-type and edit all record by top code …

And you have second way and use :

  header("Content-type: application/force-download");

This is force download header and can save files in user’s PC.