tag clud

[Werwolfe]

Ragazzi ho questo script per la tag cloud che non funziona ma non capisco qual'è il problema:

codice è questo

<?php

// Define user variables
$fontSizeUnit = "px";
$maxFontSize = 50;
$minFontSize = 12;
$tagsToDisplay = 50;
$tagDivider = "/"; // Leave blank for none

// Calculations
$fontSizeSpread = $maxFontSize - $minFontSize;

// Create a few blank arrays
$tagArray = array();
$tempTagArray = array();

// Connect to and query mySQL Database (NOTE: change "hostname," "username,"
// "password," and "databasename" to your information)
include ('config.php');
// Get all rows that don't have blank tags (NOTE: change "tablename" to your table)
$result = mysql_query("SELECT * FROM tag_tbiz WHERE tag!=''");

// Loop through each result of the query
while($row = mysql_fetch_array($result)){

    // Split the result of each query ", " (our tags will be in the form "tag 1,
    // tag 2, tag 3" etc.) and store the results to an array
    $tempStringArray = preg_split("/, /", $row["tag"]);

    // Loop through all items of this string array (i.e. loop through each tag)
    // Use a "for" loop
    for ($a = 0; $a < count($tempStringArray); $a++) {
         // Convert to lowercase
         $tempStringArray[$a] = strtolower($tempStringArray[$a]);
         // Check if it exists in tag array
         if ($tagArray[$tempStringArray[$a]] == '') {
             // If it doesn't exist, create it with value 1
             $tagArray[$tempStringArray[$a]] = 1;
         } else {
             // If it does exist, increase the value by 1
             $tagArray[$tempStringArray[$a]] += 1;
         }
     }
}
// Store to temporary array to be used to choose the top tags, then sort
// temporary array according to tag value, descending
arsort($tagArray);
$numberOfTags = 0;
foreach ($tagArray as $key => $val) {
    $numberOfTags++;

    if ($numberOfTags > $tagsToDisplay) {
        break;
    }

    $finalTagArray[$key] = $val;
}
ksort($finalTagArray);

$maxTagCount = max($finalTagArray);
$minTagCount = min($finalTagArray);

$tagCountSpread = $maxTagCount - $minTagCount;

$unitsPerCount = $fontSizeSpread/$tagCountSpread;

// Function to calculate the font size
function calcSize($thisTagCount) {

    // Import necessary global variables
    global $minTagCount, $minFontSize, $fontSizeUnit, $unitsPerCount;

    // Calculate the font size
    $thisFontSize = $minFontSize+($unitsPerCount*($thisTagCount-$minTagCount));

    // Round the font size and add units
    $thisFontSize = round($thisFontSize) . $fontSizeUnit;

    // Return the font size
    return $thisFontSize;

}

$b = 1;
foreach ($finalTagArray as $key => $val) {
    echo "<span style='font-size: ";
        echo calcSize($val);
        echo "'>" . $key . "</span>";
    if ($b != count($finalTagArray)) {
        echo " " . $tagDivider . " ";
    }
    $b++;
}

?>

l'errore che mi da è :

Warning: Division by zero in /web/htdocs/technologybiz.eu/home/prova2.php on line 65

corrispondente a questo:

$unitsPerCount = $fontSizeSpread/$tagCountSpread;


ringrazio in anticipo per l'aiuto