reading files in a directory for a slideshow.

[Chelsea7]

Hello,

I have a brief question. I'm looking to have php read and display the images from the a folder named images on a webpage. In other words, have each picture appear as a slide show, one at a time. For what I'm gathering , a for loop type statement is required.

Any assistance will be appreciated.

 

[jpadie]

Opendir
followed by readdir
followed by validating that the file is an image
followed by deriving the URL for each image
followed by outputting <img> tags for each limits.

There will be examples in the php manual under readdir or opendir most likely.

 

[Chelsea7]

Okay this is what I have below. I can get it to select an image randomally. But I want it to appear on the page on at a time like an automated slideshow;

<?php


$imageDirectory = "/upload/";


$dirHandle = opendir($_SERVER['DOCUMENT_ROOT'].$imageDirectory);


while (false !== ($dirFile = readdir($dirHandle)))
{

if ($dirFile != "." && $dirFile != "..")
{

$randomFile[] = $dirFile;
}
}


echo "<img src=\"".$imageDirectory.$randomFile[rand(0,count($randomFile)-1)]."\" alt=\"Random Image\">\n";


closedir($dirHandle);

?>

Any suggestions will be appreciated.

 

[jpadie]

use a bit of javascript on your page to update the img src from time to time. name the source image.php and append the current time to a query string

image.php?curTime=somerandomdata

the changing time as a query variable is for cachebusting

then on the php side rename the script image.php and change it slightly as follows:

<?php
$imageDirectory = "/upload/";
$dirHandle = opendir($_SERVER['DOCUMENT_ROOT'].$imageDirectory);
while (false !== ($dirFile = readdir($dirHandle))){
    if ($dirFile != "." && $dirFile != ".." && !is_dir($dirFile) ){
        $randomFile[] = $dirFile;
    }
}
closedir($dirHandle);
header ('Content-type: image/jpeg');
readfile ( $imageDirectory.$randomFile[rand(0,count($randomFile)-1)] );
exit;
?>

for performance reasons you might wish to create the randomisation at the first visit and store the random order in a session variable.