Call to undefined function cur_init() - php

Question

I've seen plenty of these both here on stackoverflow and in other places - by try as I might i am still getting this error.
Any way - useful information
The Code I am trying to execute is as follows
<?php
function getOAuthToken ( $grantCode, $grant_type ) {
global $client_id;
global $client_secret;
global $refresh_token;
try {
ini_set('display_errors', '1');
error_reporting(E_ALL);
$oauth2token_uri = "https://accounts.google.com/o/oauth2/token";
$clienttoken_post = array(
"client_id" => $client_id,
"client_secret" => $client_secret
);
if ($grant_type === "online") {
$clienttoken_post["code"] = $grantCode;
$clienttoken_post["redirect_uri"] = $refresh_token;
$clienttoken_post["grant_type"] = "authorization_code";
}
if ($grant_type == "offline") {
$clienttoken_post["refresh_token"] = $grantCode;
$clienttoken_post["grant_type"] = "refresh_token";
}
$curl = cur_init($oauth2token_uri);
}
catch ( Exception $e )
{
echo 'Message: ' .$e->getMessage();
}
};
session_start();
if (isset($_GET['code'])) {
try
{
$accessToken = getOAuthToken($_GET['code'],'online');
}
catch (Exception $e)
{
echo 'Message: ' .$e->getMessage();
}
}
?>
Windows 7 (64bit) IIS Express
PHP.INI
executing phpInfo() gives the following information.
Php Version 5.3.24
Loaded Configuration File C:\Program Files (x86)\php\php.ini
cURL support enabled
cURL Information 7.29.0
Age 3
Features
AsynchDNS Yes
Debug No
GSS-Negotiate Yes
IDN No
IPv6 Yes
Largefile Yes
NTLM Yes
SPNEGO Yes
SSL Yes
SSPI Yes
krb4 No
libz Yes
CharConv No
Protocols dict, file, ftp, ftps, gopher, http, https, imap, imaps, ldap, pop3, pop3s, rtsp, scp, sftp, smtp, smtps, telnet, tftp
Host i386-pc-win32
SSL Version OpenSSL/0.9.8y
ZLib Version 1.2.7
libSSH Version libssh2/1.4.2
Executing the following code;
<?php
$ci=#curl_version(); $cv=$ci["version_number"]; if($cv) echo "curl
installed"; else echo "curl is not installed";
?>
Shows curl installed
Libcurl.dll (v7.13) installed in Windows\System32 C:\Windows\SysWOW64
Extensions directory is given as C:\Program Files (x86)\php\v5.3\ext
this contains php_curl.dll (ver 5.3.24)
in the php.ini file the line
extension=php_curl.dll
has no semi-colon in front of it
The DLL ssleay32.dll (ver 0.9.8y) has been copied into c:\windows\System32 and C:\Windows\SysWOW64
the DLL libeay32.dll (ver 1.0.1e) has been copied into c:\windows\System32 and c:\windows\sysWOW64
Which I think covers all the answers I have been able to find but still have the ' Call to undefined function cur_init() ' error and have no idea what to try next.

Answer 1

should be
$curl = curl_init($oauth2token_uri);
and not
$curl = cur_init($oauth2token_uri);