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#19390 - 10/09/05 03:29 PM
to code or not to code. that is my question!
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UGN Member
Registered: 09/21/05
Posts: 102
Loc: Sacramento, CA
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// Ok, So those that have followed and helped me so far understand im learning PHP via books and links. Here is my question.
I have been so far learning the fundamentals of php, IE. Arrays, variables, how to manipulate arrays, foreach else elseif etc....
I have yet to deal with sessions or cookies. I am wondering whether or not I should begin coding my own projects yet.
I have just basically gotten the basics down and havent finished my book. Each time I read a new chapter I get new awesome ideas. the examples in the book are lame but show the point there making nicely. So thats kinda the problem. im a bit tired of writing such boring stuff.
Think I should begin writing my own projects or continue learning the fundamentals as I have been so far? Keep in mind I haven't touched the topic of mysql.
Im thinking of just doing what I have been doing and getting through the entire book. This way I will be familiar with mysql and then my projects can really take off. However if I never start the damn things then all I learn is book work examples and I don't really get to apply the stuff I learn in my own stuff till later.
part of the problem is I only have time to either Learn via the book or work on a project and use the book as reference. Im leaning toward keeping on the path Im on.
I dunno, this questions comes after 2 darvaset and a beer so give me a bit of slack if im rambling without making sense!
Whatcha think?
?>
PS, just realized posted this in wrong forum.. Should prob be in offtopic. sorry.
_________________________
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#19391 - 10/10/05 06:09 AM
Re: to code or not to code. that is my question!
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UGN Super Poster
Registered: 06/16/03
Posts: 807
Loc: Wisconsin
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I have experience with cookies. I haven't really delved into sessions yet, but I'll give you what I know about cookies. First off, you will need to farmiliarize yourself with setcookie() . For example, if I were to set a cookie to a user that authenticated to a script I wrote, i'd do this: if(isset($user_variable) && isset($password_variable)) {
if(is_authenticated()) {
$cookie_data = $user_variable . "-" . md5(md5("$password_variable") . "$salt");
$server_path = $_SERVER['PATH_TRANSLATED'];
$server_name = $_SERVER['SERVER_NAME'];
setcookie("cookie_name", "$cookie_data", , "", "$document_root", "$name", FALSE);
} else {
not_authenticated()
}To read from a cookie, let's say named cookie_name, I would do this: $cookie = $_COOKIE['cookie_name']; You can then deal with $cookie as the data for the cookie cookie_name For example, if I were to want to verify that the password hash sent by a user's browser was valid, like I had done above, I would do this: $cookie_exploded = explode("-", "$cookie");
$password_hash = $cookie_exploded[1];
if(md5(md5("$user_password") . "$salt")) {
is_authenticated();
} elese {
not_authenticated();
}I know this is somewhat confusing seeing as how I made up functions, so I'll put it into context with a full fledged script: <?php
$allowed_users =
array(
"Ghost" => hash("testing123")
);
$user = $_POST['user'];
$password = $_POST['password'];
$cookie = $_COOKIE['cookie_name'];
$server = $_SERVER['SERVER_NAME'];
$self = $_SERVER['PHP_SELF'];
$salt = "98u234ja";
$cookieexploded = explode("-", $cookie);
$user_cookie = $cookieexploded[0];
$password_cookie = $cookieexploded[1];
function hash($hash_password)
{
$hash = md5(md5("$hash_password") . "$salt");
return $hash;
}
function authenticated_function()
{
global $cookie;
global $user_cookie;
global $password_cookie;
$cookieexploded = explode("-", $cookie);
echo "You successfully authenticated!" . "
";
echo "User: " . $user_cookie . "
";
echo "Password Hash: " . $password_cookie . "
";
echo "Cookie Value: " . $cookie . "<br /";
}
function authenticated($cookie_user, $cookie_hash)
{
global $server;
$cookie_data = "$cookie_user" . "-" . "$cookie_hash";
setcookie("cookie_name", "$cookie_data",time() * 60 * 24 * 365, "/", "$server", FALSE);
header("Location: $self");
}
function not_authenticated()
{
echo "Not authenticated, foo.";
}
$allowed_user = $allowed_users[$user_cookie];
if(isset($allowed_user) && $allowed_user == $password_cookie) {
authenticated_function();
} elseif($allowed_users[$user_cookie] != $password_cookie) {
echo "You failed to authenticate with cookies" . "
";
} elseif(isset($user)) {
if($allowed_users[$user] == hash($password)) {
authenticated($user, hash($password));
} else {
not_authenticated();
}
} else {
?>
<html>
<head>
<title>User Authentication Test</title>
</head>
<body>
<form action="<?php echo $self; ?>" method="post">
User:<input name="user" type="text" size="25">
Password: <input name="password" type="password" size="25">
<input type="submit">
</form>
</body>
</html>
<?php
}
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