user defined function not returning value

[brockn]

I have created function to authenticate a user. It sets a variable to true and then every page will make sure that variable is set to true. The only problem is that the function gopher_auth() is not returning a value??

$auth, $userid, and $password are all set via session_register in the form that submits to the page which calls the function.

I will first show how the function is called and then the function.

THE CALLING OF THE FUNCTION.

                               //Include global functions
		include("function_code.php");

	//Check to see if user is authenticated.
	gopher_auth();

	if ( $auth == true ) {

	        // You are authenticated!!        
	        session_unregister("password");
		exit;

	} else {

		header( 'HTTP/1.0 401 Unauthorized' );
		echo '<br>Authorization Required.<br>';
		exit;
	}

THE FUNCTION ITSELF.

function gopher_auth() {

    if (isset( $userid ) && isset($password)) {

    	//Call function to connect to database.
    	gopher_connect();

    	// Formulate the query

    	$sql = "SELECT * FROM users WHERE userid = '$userid' AND password = '$password'";

    	// Execute the query and put results in $result
    	$result = mysql_query( $sql )
            or die ( 'Unable to execute query.' );

    	// Get number of rows in $result.
    	$num = mysql_numrows( $result );

    	if ( $num != 0 ) {

            	// A matching row was found - the user is authenticated.

    	        $auth = true;
    		return $auth;

    	} else {

    		$auth = false;
    		return $auth;
    	}
    print "auth = $auth";
    }

}

[barand]

It is returning a value - you are not using it.

    [COLOR=orangered]$auth = [/COLOR] gopher_auth(); 

    if ( $auth == true ) { 

    .....

hth

[brockn]

If you goto http://www.gopherbooks.com/userLogin.php and you should be able to login with userid= "php" and password = "php" you will see that it does not work.

Thank you...

I have changed the "Calling" code below. It should print $auth's value but it does not have a value.

Thanks in advance for any help..

	//Include global functions
	include("function_code.php");

	//Check to see if user is authenticated.
                            //Set variable
	$auth = gopher_auth();

	if ( $auth == true ) {

	        // You are authenticated!!        
	        session_unregister("password");
		exit;

	} else {

		header( 'HTTP/1.0 401 Unauthorized' );
                                            //Print $auth value
		print "$auth";
		echo '<br>Authorization Required.<br>';
		exit;
	}

[YappyDog]

Your function isn't returning anything because it isn't doing anything. The first thing you do is to check to see if you have a $userid and $password. Since those haven't been either passed into the function, or declared as global, you have nothing.

Try this:

function gopher_auth() {
global $userid, $password;

    if (isset( $userid ) && isset($password)) {

[brockn]

they are registered with

session_register

and given a value previously. I will check to make sure they still have that value. Thanks..

[brockn]

I have changed the first code block to this. If you goto the previous mentioned website you will see that it prints out the username and password. Thus they have values.

	//Include global functions
	include("function_code.php");

	//Check to see if user is authenticated.
	$auth = gopher_auth();

	if ( $auth == true ) {

	        // You are authenticated!!        
	        session_unregister("password");
		exit;

	} else {

		header( 'HTTP/1.0 401 Unauthorized' );
		print "$auth <br> $userid <br> $password";
		echo '<br>Authorization Required.<br>';
		exit;
	}

[YappyDog]

You proven they have values outside of your function. Try doing something similar inside the function.

[brockn]

How can I do this? I tried printing but it does not print because its not outputing the function on the webpage?? Thanks alot!

[YappyDog]

Try this:

function gopher_auth() {
echo "<li>userid = $userid<br>";
echo "<li>password = $password<br>";

if (isset( $userid ) && isset($password)) {