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Nov 12th, 2019
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  1. $sql = "select * from user where username = '$username' and password = '$password' ";
  2. echo $sql;
  3. $query = mysql_query($conn,$sql);
  4. $num_rows = mysql_num_rows($query);
  5. printf("Result set has %d rows.\n",$num_rows);
  6. if ($num_rows==0) {
  7. echo "tên đăng nhập hoặc mật khẩu không đúng !";
  8. }
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