problema con header

[Hidek1]

quitale la primera condicional y cambiale el nombre a otro
te dejo la function modificada

Código PHP:

function getMime($filename) {
    $mime_types = array(
    'txt' => 'text/plain',
    'htm' => 'text/html',
    'html' => 'text/html',
    'php' => 'text/html',
    'css' => 'text/css',
    'js' => 'application/javascript',
    'json' => 'application/json',
    'xml' => 'application/xml',
    'swf' => 'application/x-shockwave-flash',
    'flv' => 'video/x-flv',
    
    // images
    'png' => 'image/png',
    'jpe' => 'image/jpeg',
    'jpeg' => 'image/jpeg',
    'jpg' => 'image/jpeg',
    'gif' => 'image/gif',
    'bmp' => 'image/bmp',
    'ico' => 'image/vnd.microsoft.icon',
    'tiff' => 'image/tiff',
    'tif' => 'image/tiff',
    'svg' => 'image/svg+xml',
    'svgz' => 'image/svg+xml',
    
    // archives
    'zip' => 'application/zip',
    'rar' => 'application/x-rar-compressed',
    'exe' => 'application/x-msdownload',
    'msi' => 'application/x-msdownload',
    'cab' => 'application/vnd.ms-cab-compressed',
    
    // audio/video
    'mp3' => 'audio/mpeg',
    'qt' => 'video/quicktime',
    'mov' => 'video/quicktime',
    
    // adobe
    'pdf' => 'application/pdf',
    'psd' => 'image/vnd.adobe.photoshop',
    'ai' => 'application/postscript',
    'eps' => 'application/postscript',
    'ps' => 'application/postscript',
    
    // ms office
    'doc' => 'application/msword',
    'rtf' => 'application/rtf',
    'xls' => 'application/vnd.ms-excel',
    'ppt' => 'application/vnd.ms-powerpoint',
    
    // open office
    'odt' => 'application/vnd.oasis.opendocument.text',
    'ods' => 'application/vnd.oasis.opendocument.spreadsheet',
    );
    $ext = explode('.',$filename);
    $ext = array_pop($ext);
    $ext = strtolower($ext);
    if (array_key_exists($ext, $mime_types)) {
        return $mime_types[$ext];
    }elseif(function_exists('finfo_open')){
        $finfo = finfo_open(FILEINFO_MIME);
        $mimetype = finfo_file($finfo, $filename);
        finfo_close($finfo);
        return $mimetype;
    }else{
        return 'application/octet-stream';
    }
}