[Resolved] Rotating background fails – except in Edge

[Hans]

I use the following php in wp-head:

<?php if ( is_home()  || is_front_page()) : ?>
<img src='http://huppenbroich.de/wp-content/uploads/hintergrundbilder/rotate.php' id='ktgbild' alt=''>
<?php endif; ?>

This works fine in edge – but not in Chrome, Opera, Firefox. It doesn’t change the picture and works in an endless loop.

rotate.php is a standard routine which worked fine in other installations with generatepress.

This is my site.

What might be the problem???

[Tom]

Not sure what rotate.php does, but I would do it this way:

<?php
$headers = array(
	'http://yourwebsite.com/URL/TO/header1.jpg',
	'http://yourwebsite.com/URL/TO/header2.jpg',
	'http://yourwebsite.com/URL/TO/header3.jpg',
	'http://yourwebsite.com/URL/TO/header4.jpg',
);

$random = $headers[ rand( 0, count( $headers ) -1 ) ];
?>
<style>
	body{background-image:url('<?php echo $random; ?>');background-size:cover;}
</style>

[Hans]

Hi Tom,

unfortunately this is very uncomfortable as I change the background very often. Could you please have a look at rotate:

<?php
/*
By Matt Mullenweg > http://photomatt.net
Inspired by Dan Benjamin > http://hiveware.com/imagerotator.php
Latest version always at:
http://photomatt.net/scripts/randomimage
*/// Make this the relative path to the images, like "../img" or "random/images/".
// If the images are in the same directory, leave it blank.
$folder = '';

// Space seperated list of extensions, you probably won't have to change this.
$exts = 'jpg jpeg png gif';

$files = array(); $i = -1; // Initialize some variables
if ('' == $folder) $folder = './';

$handle = opendir($folder);
$exts = explode(' ', $exts);
while (false !== ($file = readdir($handle))) {
foreach($exts as $ext) { // for each extension check the extension
if (preg_match('/\.'.$ext.'$/i', $file, $test)) { // faster than ereg, case insensitive
$files[] = $file; // it's good
++$i;
}
}
}
closedir($handle); // We're not using it anymore
mt_srand((double)microtime()*1000000); // seed for PHP < 4.2
$rand = mt_rand(0, $i); // $i was incremented as we went along

header('Location: '.$folder.$files[$rand]); // Voila!
?>

I really wonder what could be the reason.

[Tom]

That script was last updated in 2003.

You’re definitely better off going with a more modern approach.

[Hans]

It seems to be a caching problem. The editors handle it differently.

[Author]

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