I have found a file on ../setup/install.php!
In this file, i find "short_open_tag" but where can i set it on?
//Basic checks
$inc='install.inc.php';
$info=$install;
if(file_exists('../ostconfig.php')) { //old installation? try upgrading it buddy.
header('Location: upgrade.php');
die('Old installation exists....try upgrade instead');
}elseif((double)phpversion()
$errors='PHP installation seriously out of date';
$inc='php.inc.php';
}elseif(!ini_get('short_open_tag')) {
$errors='Short open tag disabled! - osTicket requires it turned on.';
$inc='shortopentag.inc.php';
}elseif(!file_exists(CONFIGFILE)) {
$errors=sprintf('Configuration file (%s) missing!',basename(CONFIGFILE));
$inc='missing.inc.php';
}elseif(($cFile=file_get_contents(CONFIGFILE)) && preg_match("/define\('OSTINSTALLED',TRUE\)\;/i",$cFile)){
$errors='Configuration file already modified!';
$inc='unclean.inc.php';
}elseif(!file_exists(CONFIGFILE) || !is_writable(CONFIGFILE)) { //writable config file??
$errors='Configuration file is not writable';
$inc='chmod.inc.php';
...
