Convert strings into asterisks - php

Question

im working on a php-based system. one of its features is allows user to download an excel file containing all the information in one of my table in my database. my problem is, one data of that information is classified to other users. thus, i want to convert the output of that data into a string of asterisk.
<?PHP
//MySQL Database Connect
include 'datalogin.php';
function cleanData(&$str)
{
$str = preg_replace("/\t/", "\\t", $str);
$str = preg_replace("/\r?\n/", "\\n", $str);
if(strstr($str, '"')) $str = '"' . str_replace('"', '""', $str) . '"';
}
# filename for download
$filename = "website_data_" . date('Ymd') . ".xls";
header("Content-Disposition: attachment; filename=\"$filename\"");
header("Content-Type: application/vnd.ms-excel");
$flag = false;
//$result = pg_query("SELECT * FROM data_mapping ORDER BY CE_Hostname") or die('Query failed!');
/*$query = "SELECT * FROM data_mapping";
while(false !== ($row = pg_fetch_assoc($result))) {
//while(false !== ($row = pg_fetch_assoc($result))) {
//$result=mysql_query($query);
$row=mysql_fetch_array($result);
$row=mysql_fetch_assoc ($result);
//$row=$row['Cust_Segment'];
// foreach($data as $row)
# display field/column names as first row
if(!$flag) {
echo implode("\t", array_keys($row)) . "\r\n";
$flag = true;
}
array_walk($row, 'cleanData');
echo implode("\t",($row)) . "\r\n";
}
*/
$sql = 'SELECT CE_Hostname, Cust_Segment, Cust_Site_Name, CE_WAN_IP_Addr, CE_Bkp_IP_Addr, Cust_Name, Svc_Type, com_string FROM data_mapping';
$result = mysql_query($sql);
if (!$result) {
echo "DB Error, could not query the database<br>";
echo 'MySQL Error: ' . mysql_error();
exit;
}
echo "Hostname\t Group/System\t Site Name\t IP ADDR\t BKP IP ADDR\t System Name\t Device Type\t Comm_String\r\n";
while ($row = mysql_fetch_assoc($result)) {
echo implode("\t",($row)) . "\r\n";
}
mysql_free_result($result);
//exit;
?>
i want to convert only the comm_string result. thanks.

Answer 1

$sql = 'SELECT CE_Hostname, Cust_Segment, Cust_Site_Name, CE_WAN_IP_Addr, CE_Bkp_IP_Addr, Cust_Name, Svc_Type, com_string FROM data_mapping';
Can simply be updated to not included the classified field
$sql = 'SELECT CE_Hostname, Cust_Segment, Cust_Site_Name, CE_WAN_IP_Addr, CE_Bkp_IP_Addr, Cust_Name, Svc_Type FROM data_mapping';
Or if you still want to show some value there without any change in your PHP code then you could do
$sql = 'SELECT CE_Hostname, Cust_Segment, Cust_Site_Name, CE_WAN_IP_Addr, CE_Bkp_IP_Addr, Cust_Name, Svc_Type, 'SECRET' FROM data_mapping';
This will then show SECRET instead of that code

Answer 2

Try this:
while ($row = mysql_fetch_assoc($result))
{
$row['Comm_String'] = preg_replace( '/./', '*', $row['Comm_String'] );
echo implode("\t",($row)) . "\r\n";
}