Random image background change PHP CSS

Question

I have set up a background changing script, which works just fine on one of my other web sites and when I have tried to do it on this new one (http://bit.ly/1Hwbn94), it just shows the first background image and does not randomly change it every 20 seconds (after clicking on another page).

Did I mess something up with the PHP code? I cannot find the error up to now. Maybe I have to add something to the header.php?

PHP code in random_img.php

<?php
header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
header("Cache-Control: no-store, no-cache, must-revalidate"); // HTTP/1.1
header("Cache-Control: post-check=0, pre-check=0", false);
header("Pragma: no-cache"); // HTTP/1.0
header("Expires: Sat, 26 Jul 1997 05:00:00 GMT"); // Date in the past
header('Content-Type: image/jpeg');
$bilder = glob( "../showcase/images/*.jpg" );
$seed = floor(time()/20); 
srand($seed); 
$random_image = $bilder[rand(0, count($result)-1)];
header('Location:'.$random_image.'');
?>

CSS code

body { 
width: 100%;
height: 100%;
margin: 0;
padding: 0;
background: url("../random_img.php") no-repeat top left fixed; -webkit-background-size: cover; -moz-background-size: cover; -o-background-size: cover; background-size: cover; background-attachment: fixed;
}

Well, I guess so. If the path would not be right, there would be no background picture at all, but it is loading the first one. — vega
– vega, Commented Apr 24, 2015 at 13:26

cske · Accepted Answer · 2015-04-24 13:27:45Z

1

At this line $result is undefined

$random_image = $bilder[rand(0, count($result)-1)];

Correct

$random_image = $bilder[rand(0, count($bilder)-1)];

answered Apr 24, 2015 at 13:27

cske

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1 Comment

vega Over a year ago

Haha, yeah, it is a pest. Especially, when reading stuff allover thousands of times. :D

pablorsk · Accepted Answer · 2015-04-24 13:28:17Z

0

The problem maybe is the cache of CSS.

Try in your CSS

 background: url("../random_img.php?nocache=1") no-repeat top left fixed;

Regards...

answered Apr 24, 2015 at 13:28

pablorsk

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Comments

Eko3alpha · Accepted Answer · 2015-04-24 13:30:20Z

0

Try doing this, there may be a php error happening in the background that you wont be able to see if you have your headers set as image/jpeg. Remove all the custom headers and try the following code in a php file in the same directory and see if you get any errors.

$bilder = glob( "../showcase/images/*.jpg" );
$seed = floor(time()/20); 
srand($seed); 
$random_image = $bilder[rand(0, count($bilder)-1)];
echo $random_image;

If all is setup correctly, your images are in the right directories you should see a string of the image chosen.

answered Apr 24, 2015 at 13:30

Eko3alpha

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