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Navigation through a page-list, which is returned by a Database

Navigation through a page-list, which is returned by a Database

<?php 

//*

//    Function, which automaticly prints a page-navigation, 
//    when there are more entries which are returned from 
//    a database then should be printed on a page 
// 
// 
//    The function needs three parameter 
// 
//    1. allEntries:    Integer, Number of all DB-Entries 
//    2. limitBy:     Integer, Number of Entries, which are printed on one Page 
//    3. limitStart:               Integer, Offset 
// 
//

function showPageNavigation($allEntries, $limitStart=0, $limitBy=20) 
    { 
    $lastPageEntries = ($allEntries % $limitBy);   
    $allPages = round(($allEntries - $lastPageEntries) / $limitBy)+1;   
    if($lastPageEntries>0 and $allPages==0) {$allPages=$allPages+1;}   
    $thisPage = round(($limitStart+$limitBy) / $limitBy);   
    print "<b><br>Page ".$thisPage." of ".$allPages."<br><br></b>";   
    if($allEntries > $limitBy)   
        { 
        print "<b>Pages:</b> "; 
        for($entryNr=1; $entryNr<=$allPages; $entryNr++) 
            { 
            $startPage = ($entryNr * $limitBy) - $limitBy; 
            if($thisPage!=$entryNr){print "<b><a href=\"".$PHP_SELF."?limitStart=".$startPage."\">".$entryNr."</a></b> ";} 
            else{print "<b>".$entryNr."</b> ";}   
            } 
        } 
    $startNext = $thisPage * $limitBy; 
    if($startNext < ($allPages * $limitBy) and $allEntries > $limitBy)   
        {print "     <b><a href=\"".$PHP_SELF."?limitStart=".$startNext."\">next</a></b> ";} 
    } 
?> 

<?php 
    if(!isset($limitStart)){$limitStart = 0;} 
    showPageNavigation(130,$limitStart,20); 
?>