Random image generator help request

[tonto68]

Hello, I'm a total rookie at this. I have a script which generates a random image from a file ( of images uploaded by my forum users) . It works fine except one user uploads a .png image with all of his posts and its' showing up too frequently. I thought I had the script pulling just jpg and jpeg images but for some reason this .png shows up. I'm trying to modify the code to block or at least limit this .png image from showing up. The file is also 541 bytes(?) if that helps. The other images (pics) are much larger sizes so maybe a line of code specifying a minimum file size would work.  My code is below. Please let me know how I should modify this (please give step by step instructions because this is Greek to me)...thanks!  My code is below:

<?php
Header("Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0");
Header("Expires: Thu, 19 Nov 1981 08:52:00 GMT");
Header("Pragma: no-cache");
Header("Content-Type: image/jpg");
Header("Content-Type: image/jpeg");


$dir = "forums/uploads/images"; // This is the folder where the images are

srand((double)microtime()*1000000);
$i = 0;
$dirHandle = opendir($dir); // Open the images folder
while(($im = readdir($dirHandle)))
{
if($im != ".." && $im != ".") // Don't read in the 2 folders ".." and "."
{
$image[$i] = $im; // Select an image
$i++;
}
}
closedir($dirHandle); // Close the folder
$n = rand(0,(count($image)-1));

if(!readfile($dir."/".$image[$n])) // Read the image
readfile($dir."error/error.gif"); // If the script can't find the directory, display this image
?>

[Orio]

[code]<?php

header("Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0");
header("Expires: Thu, 19 Nov 1981 08:52:00 GMT");
header("Pragma: no-cache");
header("Content-Type: image/jpg");
header("Content-Type: image/jpeg");


$dir = "forums/uploads/images"; // This is the folder where the images are

srand((double)microtime()*1000000);
$i = 0;
$dirHandle = opendir($dir); // Open the images folder
while(($im = readdir($dirHandle)))
{
if($im != ".." && $im != ".") // Don't read in the 2 folders ".." and "."
{
$ext = strtolower(strrchr($filename,"."));
if($ext == ".jpg" || $ext == ".jpeg" || $ext == ".jpe")
{
$image[$i] = $im; // Select an image
$i++;
}
}
}
closedir($dirHandle); // Close the folder
$n = rand(0,(count($image)-1));

if(!readfile($dir."/".$image[$n])) // Read the image
readfile($dir."error/error.gif"); // If the script can't find the directory, display this image

?>[/code]

I added a part that checks if the extension is jpg, jpe or jpeg.

Orio.

[tonto68]

Thanks for your reply.  I tried using the code you gave me but unfortunately all that shows up where the pic should go is a vertical line. 

[corillo181]

you should try going with mysql.