vb.org Archive - Random background image with PHP

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- - Random background image with PHP (https://vborg.vbsupport.ru/showthread.php?t=285178)

stryka

07-03-2012 09:20 PM

Random background image with PHP

I currently have a PHP function that does a directory scan and randomly pulls an image to appear in the background CSS tag...

It essentially creates the following entry before the BODY tag

PHP Code:


		
			
<style type="text/css">

body {

background-image: url(http://www.sitename.com/img/bg/IMG_1461_edit.jpg);

}

</style>

Any idea how i can do this in VB3.8?

Thanx

kh99	07-03-2012 10:12 PM

Try creating a new plugin using hook parse_templates and code like this (insert your function at the comment):

Code:

ob_start();

// call your function here

$str = ob_get_contents();

ob_end_clean();



$vbulletin->templatecache['headinclude'] .= addcslashes($str, '\\"');

stryka

07-04-2012 09:55 PM

hmm... I think I lost you... what value does $str need to be for it to work?

is this the value i am sending

PHP Code:


		
			
background-image: url(http://www.sitename.com/img/bg/IMG_1461_edit.jpg);

kh99	07-04-2012 10:03 PM

$str would have to be the entire thing you posted in the first post. If your function is only returning the part you posted above, then try this:

PHP Code:


		
			
ob_start();
// call your function here
$str = ob_get_contents();
ob_end_clean();

$str = '<style type="text/css">
body {
' . $str . '
}
</style>
';
$vbulletin->templatecache['headinclude'] .= addcslashes($str, '\\"');

Also, I was assuming that your function output a string. If it returns a string, then you don't need the ob_start()/ob_end_clean() calls.

stryka

07-04-2012 10:24 PM

ahh... so my plugin would look like this...

PHP Code:


		
			




function get_random_image() {



    $files = scandir($_SERVER['DOCUMENT_ROOT'].'/app/webroot/img/bg');

    $count  = count($files);

    srand(time());

    $img = $files[rand(0,$count)];

    if(($count-2) <= 0) return FALSE;

    return $img;



}



function get_random_image_ex() {

do {

    $img = get_random_image();

    if($img === FALSE) return FALSE;

    if($img != '.' && $img != '..' && !empty($img))  break;

    }while(true);

    

    return FULL_BASE_URL.'/img/bg/'.$img;

}





$str = get_random_image_ex();



if($str!== FALSE) {





$str = '<style type="text/css">

body {background-image: 

' . $str . '

}

</style>

';

$vbulletin->templatecache['headinclude'] .= addcslashes($str, '\\"');

kh99	07-04-2012 10:27 PM

Looks good, except the post is missing the last } .

stryka

07-04-2012 10:45 PM

Darn... the entry is getting inserted into the HTML when i view source... but the page isn't taking the value and showing the image... i even tried deleting the "background" value in style template of admincp... hmmmm.... so close

kh99	07-04-2012 10:56 PM

What does it look like when you view the html? Looking more closely at the function you posted, I don't see where the "background-image: url(" and the closing ")" come from - maybe those need to be added to the plugin code?

stryka

07-05-2012 09:54 AM

yup.. that was it.. i usually dont get much help in this forum....

THanks for the help!

Quote:

Originally Posted by kh99 (Post 2345166)

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