Prendre les 10 dernieres photos script php

Bonjour,

voici mon code php il scanne un dossier donné et fait un diaporama ensuite mais voici mon probleme

dans mon répertoire il u a au dessus de 300 photos j'aimerait qu il prenne seulement les 10 derniere elle sont numérotés de 1 a 300

merci

<?php

class PHPDiapo {
var $relPath;
var $images;
var $id;
var $className;
var $transition_time=3;
var $transition_pause;

function PHPDiapo ($path,$id,$className="",$timeout=3, $attrs=array()) {
$this->attrs = $attrs;
$this->relPath = $path;
$this->id = $id;
$this->className = $className;
if ($timeout) $this->transition_pause = $timeout;
$this->init();
$this->write();
}

function init() {
$this->images=array();
$dir = $_SERVER["PATH_TRANSLATED"];
$dir = substr($dir,0,strrpos($dir,"/")+1);
$dir .= $this->relPath;
$hdl = opendir($dir);

while (false !== ($file = readdir($hdl))) {
if($file!="." && $file!="..") {
// check file extension
$pattern = '/\.(gif|png|jpg|jpeg)$/i';
if (!preg_match($pattern, $file, $matches)) continue;
if(is_file($dir."/".$file))
$this->images[]="$this->relPath/$file";
}
}
sort($this->images);
}

function write() {
$this->write_func();
$first=$this->images[0];
$this->write_JS_init();
echo $this->img($first,$id=$this->id,$className=$this->className);
$this->write_JS_launch();
}

function write_JS_init() {
echo "images['".$this->id."']=new Array();\r";
for ($i=0;$i<sizeof($this->images);$i++) {
echo "images['".$this->id."'][$i]=new Image();\r";
echo "images['".$this->id."'][$i].src=\"".$this->images[$i]."\";\r";
echo "images['".$this->id."'][$i].alt=\"".$this->get_alt($this->images[$i])."\";\r";
}
echo "</script>\r\r";
}


function write_func(){
echo "\r<script type=\"text/javascript\">\r";

static $already_write = false;
if ($already_write) {

}
else {

echo "
var FRAME_PER_SEC = 20;
function set_opacity(el, op) {
el.style.opacity = op;
el.style.MozOpacity = op;
el.style.KhtmlOpacity = op;
el.style.filter = 'alpha(opacity=' + op*100 + ')';
el.opacity = op;
}

function fade_in(imageId) {
var img = document.getElementById(imageId);
var incr = 1/((img.transition_time/3)*FRAME_PER_SEC);
var newOp = img.opacity+incr;
newOp = (newOp > 1) ? 1.0 : newOp;
set_opacity(img, newOp);
if (newOp < 1) setTimeout('fade_in(\"'+imageId+'\")',1000/FRAME_PER_SEC);
}

var images = new Array();
function run_diapo(diapoId) {
obj = document.getElementById(diapoId);
obj.src = images[diapoId][obj.index].src;
obj.alt = images[diapoId][obj.index].alt;
obj.title = images[diapoId][obj.index].alt;
obj.opacity = 0.0;

fade_in(diapoId);
obj.index+=1;
if (obj.index >= obj.length_diapo) obj.index=0;
obj.timeout = setTimeout('run_diapo(\"'+diapoId+'\")', obj.transition_pause * 1000);
}\r";
$already_write = true;
}
}

function write_JS_launch() {
$diapoID=$this->id;
echo "\r<script type=\"text/javascript\">\r";
echo "obj = document.getElementById('".$diapoID."');\r";
echo "obj.transition_time=".$this->transition_time.";\r";
echo "obj.transition_pause=".$this->transition_pause.";\r";
echo "obj.index=0;\r";
echo "obj.length_diapo=images['".$diapoID."'].length;\r";
echo "obj.timeout;\r";

echo "if (obj.length_diapo > 0) run_diapo('".$diapoID."');\r";
echo "</script>\r\r";
}

function get_alt($src) {
# strip path
$txt=substr($src,strrpos($src,"/")+1);
# strip extension
$txt=substr($txt,0,strrpos($txt,"."));
# strip special chars
$tostrip=array("_",",","-");
for ($i=0;$i<sizeof($tostrip);$i++) $txt=str_replace($tostrip[$i]," ",$txt);
return $txt;
}

function img($src,$id="",$class="") {
$has_link = false;
$alt=$this->get_alt($src);
$img = "<img id='$id' name='$id' class='$class' alt='$alt' title='$alt' src='$src'";
foreach($this->attrs as $key=>$value)
{
if ($key=="href" && !$has_link) {
$has_link = true;
$img = "<a href=$value>$img";
}
else {
$img .= " $key='$value' ";
}
}
$img .= "/>\r";
if ($has_link) $img .= "</a>";
return $img;
}
}