/**
* Check latex cgi script
*
* @param string latex cgi url
* @return boolean true -> OK | false -> not OK
*/
function testLatex($a_latex_url)
{
// latex is optional, so empty path is ok
if (trim($a_latex_url) == "") {
return "";
}
// open the URL
include_once "./setup/classes/class.ilHttpRequest.php";
$http = new ilHttpRequest(ilUtil::stripSlashes($a_latex_url) . "?x_0");
$result = @$http->downloadToString();
if (strpos(substr($result, 0, 5), "PNG") !== FALSE || strpos(substr($result, 0, 5), "GIF") !== FALSE) {
return "";
} else {
return "check_failed_latex";
}
}
