note 89045 added to function.getenv

This is a sample function for checking if your visitor comes from this certain country. This is especially useful for amateur webmasters who don't want to use sql databases. Sample use of function: <?php if(check_coutry('http://www.domain.com/files/philippines.csv') === true) echo 'You are from the Philippines'; ?> Basically, you'll need CSV (or TXT) which lists the IP ranges of a certain country. Example (excerpt of the philippines.csv only): 58.69.0.0, 58.69.255.255 58.71.0.0, 58.71.127.255 61.9.0.0, 61.9.127.255 61.14.28.0, 61.14.28.63 61.14.41.136, 61.14.41.143 and so on until the end You may obtain these CSV files in a number of websites out there. Be sure to update these CSV files regularly as these IP ranges change from time to time. Here is the function: <?php function check_country($url_csv){ $curl_handle = curl_init(); curl_setopt($curl_handle, CURLOPT_URL, $url_csv); curl_setopt($curl_handle, CURLOPT_RETURNTRANSFER, 1); $str_fromfile = curl_exec($curl_handle); curl_close($curl_handle); $range = explode("\n", $str_fromfile); $ip_addr = getenv(REMOTE_ADDR); //gets the IP of the visitor $ip_byte = explode('.', $ip_addr); $ip_number = (16777216 * (int) $ip_byte[0]) + (65536 * (int) $ip_byte[1]) + (256 * (int) $ip_byte[2]) + ((int) $ip_byte[3]); for($i = 0; $range[$i] != NULL && $is_positive == NULL; $i++){ // the condition $line[$i] != NULL means that you should not put blank lines before the end of your CSV. The values should start at line 1. $range[$i] = rtrim(ltrim($range[$i])); //you may remove this if you are sure the CSV doesnt contain whitespaces $ends_addr = explode(',', $range[$i]); //for CSV (comma-separated values), comma is the separator. You may change this if your TXT uses different separator. $ends_addr[0] = rtrim($ends_addr[0]); //again, you may remove this if your CSV is free from whitespaces $ends_addr[1] = ltrim($ends_addr[1]); //yet, again $start_ip_byte = explode('.', $ends_addr[0]); $end_ip_byte = explode('.', $ends_addr[1]); $start_ip_number = (16777216 * (int) $start_ip_byte[0]) + (65536 * (int) $start_ip_byte[1]) + (256 * (int) $start_ip_byte[2]) + ((int) $start_ip_byte[3]); $end_ip_number = (16777216 * (int) $end_ip_byte[0]) + (65536 * (int) $end_ip_byte[1]) + (256 * (int) $end_ip_byte[2]) + ((int) $end_ip_byte[3]); if($ip_number >= $start_ip_number && $ip_number <= $end_ip_number) $is_positive = 1; } if($is_positive == 1) return true; else return false; } ---- Server IP: 202.90.158.134 Probable Submitter: 202.92.128.31 ---- Manual Page -- http://www.php.net/manual/en/function.getenv.php Edit -- https://master.php.net/note/edit/89045 Del: integrated -- https://master.php.net/note/delete/89045/integrated Del: useless -- https://master.php.net/note/delete/89045/useless Del: bad code -- https://master.php.net/note/delete/89045/bad+code Del: spam -- https://master.php.net/note/delete/89045/spam Del: non-english -- https://master.php.net/note/delete/89045/non-english Del: in docs -- https://master.php.net/note/delete/89045/in+docs Del: other reasons-- https://master.php.net/note/delete/89045 Reject -- https://master.php.net/note/reject/89045 Search -- https://master.php.net/manage/user-notes.php