php - Multiple User Registration MYSQL -


so have api script , people going have hwid , has add information account when open program, when there multiple user same hwid screws , doesn't add info account, here's code i'm using:

$cpukey = mysql_escape_string($_get['cpukey']);     $ip = mysql_escape_string($_get['ip']);     $pcname = mysql_escape_string($_get['pcname']);     $con = mysql_connect($host,$username,$password);     mysql_select_db("$db_name", $con);     $sql="select * $table cpukey = '$cpukey'";     $result=mysql_query($sql);     $count=mysql_num_rows($result);     if($count == 1){         $result = mysql_query("select * $table") or die(mysql_error());          while($row = mysql_fetch_array( $result )) {         $time = time();         if ($row['ip'] = '-' , $row['pcname'] = '-'){             mysql_query("update $table set pcname = '$pcname'             cpukey = '$cpukey' , pcname = '-'");             mysql_query("update $table set ip = '$ip'             cpukey = '$cpukey' , pcname = '$pcname'");             if ( $row['expire'] > $time) {                 $str1 = "not expired";             }else{                 $str1 = "expired";                 mysql_query("update $table set expired = 'yes'                 cpukey = '$cpukey' , pcname = '$pcname'");                 mysql_query("update $table set banned = '1'                 cpukey = '$cpukey' , pcname = '$pcname'");             }             echo $str1;         } else {             mysql_query("update $table set pcname = '$pcname'             cpukey = '$cpukey' , pcname = '$pcname'");             mysql_query("update $table set ip = '$ip'             cpukey = '$cpukey' , pcname = '$pcname'");             if ( $row['expire'] > $time) {                 $str1 = "not expired";             }else{                 $str1 = "expired";                 mysql_query("update $table set expired = 'yes'                 cpukey = '$cpukey' , pcname = '$pcname'");                 mysql_query("update $table set banned = '1'                 cpukey = '$cpukey' , pcname = '$pcname'");             }             echo $str1;             }         }     }     mysql_close($con);     mysql_connect($host, $username, $password) or die(mysql_error());     mysql_select_db($db_name) or die(mysql_error());     $result = mysql_query("select * $table") or die(mysql_error());      while($row = mysql_fetch_array( $result )) {     if ( $cpukey == $row['cpukey'] ) {        if ( $row['banned'] == 0) {         $str = "not banned";             break;        }else{             $str = "banned";}             break;     } else {             $str = "don't exist";}      }     echo $str;

now want code add users' info if info hasn't been entered yet, witch info "-" , when open program change info else... in other words make people can have same hwid , won't give errors...

here problem:

if ($row['ip'] = '-' , $row['pcname'] = '-'){

it should be

if ($row['ip'] == '-' , $row['pcname'] == '-'){

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