NEED HELP WITH PHP!

[Anon]

hi there .. I am completely stuck with the following and was hoping if someone could help me there ... i want to do a links-section where u can add your own links to existing links.
to start with i used arrays for the existing links in my flash movie so that i can push additional information easy into it. Currently i am trying to come up with a script that allows me to write the info given by the user (LinkName, LinkURL) to a textfile called subscriber.dat.
from there i wanted to read back the added info and update the info displayed in my flash movie.

the following script is what i came up with but it doesn't work :

<?
if (!isset($linkname) || !isset($linkurl) || empty($linkurl) || empty($linkname)) {fail("Both, name and url, are required");}
$linkname = strtolower($linkname);
$linkurl = strtolower($linkurl);
$subsFile = 'subscriber.dat';

switch($action) {
case "subscribe":
subscribe($linkname, $linkurl);
break;
}

function subscribe($linkname, $linkurl) {
if (isSubscribed($linkurl)) {
fail("$linkurl already exists");
$logEntry="$linkurl already exists");
writeLog($logEntry);
}

$joinDate = time();

$file = fopen('subscriber.dat', 'a+');

if (!$file) {
    fail("Error: Couldn't add link")
    $logEntry="Error: Couldn't add link");
    writeLog($logEntry);
}

fputs($file, "$linkname|$linkurl|$joinDate\n");
fclose($file);
sendEmail($linkname, $linkurl);

success();

}

function sendEmail($linkname, $linkurl) {
$mailTo = "Wolfgang Fruchtl<[e-mail]>";
$mailFrom = "From: WWW.JUSTSAYINGHELLO.COM";
$mailSubject = "NEW LINK HAS BEEN ADDED...";
$mailBody = "$linkname, $linkurl\n\nY";
mail($mailTo, $mailSubject, $mailBody, $mailFrom);
}

function isSubscribed($linkurl) {
$matchFound = false;
$subscribers = file('subscriber.dat');

if ($subscribers) {
    foreach($subscribers as $count => $subscriber) {
        $info = explode('|', $subscriber);

        if($info[1] == $linkurl) {
            $matchFound = true;
        }
    }
}

return $matchFound;

}

function fail($errorMsg) {
$errorMsg = urlencode($errorMsg);
print "&result=Fail&errorMsg=$errorMsg";
exit;
}

function success() {
print "&result=Okay";
exit;
}

function fetchList() {
// Register global variables
global $subsFile;
// Attempt to open subscriber file
$subscribers = file($subsFile);

// For each subscriber line...
foreach($subscribers as $count => $subscriber) {
    // split subscriber info into array
    $info = explode('|', $subscriber);

    // Assign array to meaningful variable name
    $linkname = $info[0];
    $linkurl = $info[1];
    $joined = $info[2];

    // Create a readable joined date out of timestamp
    $joined = strftime("%D", $joined);

    // Output information for each subscriber
    echo "&newlinkname=" . urlencode($linkname);
  	echo "&newlinkurl=" . urlencode($linkurl);
  	echo "&newjoined=" . urlencode($joined);
}

}

function writeLog($logEntry) {
// Filename of log file
$logFile = "error.log";

    // Create human readable date/time string for
    // current time
    $dateStamp = strftime("%D %T", time());

    // Open log file for appending
    $file = @fopen($logFile, "a");

    // If we've opened the file successfully
    if ($file) {
        // Write the log entry and close file
        fwrite($file, "$dateStamp: $logEntry\n");
        fclose($file);

        // Return success
        return true;
    } else {
        // Otherwise, return failure
        return false;
    }
}

?>

can anyone help me with this ... PPLLLEEEAAAAASSSEEEEEE

[Anon]

you would get a lot more volunteers if you pointed out where the problems were. We're not going to wade through every line of code for you.