convert doc to pdf in php - php

Question

I need to convert doc file in pdf format
for that I am following saaspose functions mentioned below
(http://api.saaspose.com/v1.0/words/help)
I am not getting an error and a garbage file is uploaded along with doc file but I need to upload pdf file with same doc contents.
private function convertDocToPdf($inputFileName,$outputFileName)
{
$doc = new WordDocument("");//Word document is a class to create new document
$result = $doc->ConvertLocalFile($inputFileName, $outputFileName,"pdf");
}
private function ConvertLocalFile($input_path, $output_path, $output_format) {
try {
$str_uri = "http://api.saaspose.com/v1.0/words/convert?format=" + $output_format;
$signed_uri = Sign($str_uri);
$responseStream = uploadFileBinary($signed_uri, $input_path, "xml");
$v_output = ValidateOutput($responseStream);
if ($v_output === "") {
if ($output_format == "html")
$save_format = "zip";
else
$save_format = $output_format;
saveFile($responseStream,$outputFilename);
return "";
}
else
return $v_output;
} catch (Exception $e) {
throw new Exception($e->getMessage());
}
}
public static function saveFile($input, $fileName){
$fh = fopen($fileName, 'w') or die("can't open file");
fwrite($fh, $input);
fclose($fh);
}
public static function Sign($UrlToSign) {
// parse the url
$url = parse_url($UrlToSign);
if (isset($url['query']) == "")
$urlPartToSign = $url['path'] . "?appSID=" . 1fc17cb5-6c47-462e-9dfd-d1a9525220fa;
else
$urlPartToSign = $url['path'] . "?" . str_replace(" ","%20",$url["query"]) . "&appSID=" . SaasposeApp::$AppSID;
// Decode the private key into its binary format
$decodedKey = self::decodeBase64UrlSafe(87c027855aebf72e204b3bcd710de1c0);
// Create a signature using the private key and the URL-encoded
// string using HMAC SHA1. This signature will be binary.
$signature = hash_hmac("sha1", $urlPartToSign, $decodedKey, true);
$encodedSignature = self::encodeBase64UrlSafe($signature);
if (isset($url['query']) == "")
return $url["scheme"] . "://" . $url["host"] . str_replace(" ", "%20",$url["path"]) . "?appSID=" . 1fc17cb5-6c47-462e-9dfd-d1a9525220fa . "&signature=" . $encodedSignature;
else
return $url["scheme"] . "://" . $url["host"] . str_replace(" ", "%20",$url["path"]) . "?" . str_replace(" ","%20",$url["query"]) . "&appSID=" . 1fc17cb5-6c47-462e-9dfd-d1a9525220fa . "&signature=" . $encodedSignature;
}
public static function uploadFileBinary($url, $localfile, $headerType="XML") {
$headerType = strtoupper($headerType);
$fp = fopen($localfile, "r");
$session = curl_init();
curl_setopt($session, CURLOPT_VERBOSE, 1);
curl_setopt($session, CURLOPT_URL, $url);
curl_setopt($session, CURLOPT_PUT, 1);
curl_setopt($session, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($session, CURLOPT_HEADER, false);
if ($headerType == "XML") {
curl_setopt($session, CURLOPT_HTTPHEADER, array('Accept: application/xml', 'Content-Type: application/xml'));
} else {
curl_setopt($session, CURLOPT_HTTPHEADER, array("Content-Type: application/json"));
}
curl_setopt($session, CURLOPT_INFILE, $fp);
curl_setopt($session, CURLOPT_INFILESIZE, filesize($localfile));
$result = curl_exec($session);
//$error = curl_error($session);
//$http_code = curl_getinfo($session, CURLINFO_HTTP_CODE);
curl_close($session);
fclose($fp);
return $result;
}
public static function ValidateOutput($result)
{
$string = (string)$result;
$validate = array("Unknown file format.", "Unable to read beyond the end of the stream",
"Index was out of range", "Cannot read that as a ZipFile", "Not a Microsoft PowerPoint 2007 presentation",
"Index was outside the bounds of the array", "An attempt was made to move the position before the beginning of the stream",
);
$invalid = 0;
foreach ($validate as $key => $value) {
$pos = strpos($string, $value);
if ($pos === 1)
{
$invalid = 1;
}
}
if($invalid == 1)
return $string;
else
return "";
}
Kindly provide me the solution because this error hampers my work terribly.