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Password authentification

Password authentification

<? 
if (!empty($addtolog)) { 

$connection = mysql_pconnect($dbhost,$dbuser,$dbpass); 
$verify = "SELECT * FROM tablename WHERE username='$admin' and password='$password'"; 
$verres = mysql_db_query($dbname,$verify,$connection); 
$num = mysql_numrows($verres); 
        if ($num != "0") { 
$query = "INSERT INTO adminlog (id,admin,entry,date) VALUES ('0000','".$admin."','".$entry."','".$date."')"; 
$result = mysql_db_query($dbname,$query,$connection); 
mysql_close($connection); 
exit; 
        } else { 
        echo "username and password are either incorrect or not in the database"; 
        exit; 
        } 
} 
?> 
<form method="post"> 
name: <input type="text" name="admin"><br> 
passwd <input type="password" name="password"><br> 
entry: <textarea cols="30" rows="4" wrap="virtual" name="entry"></textarea> 
<br><input type="submit" name="addtolog"> 
</form>

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