The index.php file is available:
``` ". md5($_REQUEST["combination"]);          }          if(md5($_REQUEST["combination"]) == $hash){              echo " The Flag is flag{...}";          }          else{              echo "Wrong!";          }
      }?>```
The value of hash is just a number using scientific notation. This is a php loose comparison. Using a input that will also be considered as a number will set the condition to true. We use 240610708, which md5 hash is 0e462097431906509019562988736854, as a password and we got the flag.
    The Flag is flag{!5_Ph9_5TronGly_7yPed?}