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Author Topic: Random image from folder block  (Read 7484 times)

0 Members and 1 Guest are viewing this topic.

Offline SMiller

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  • SMF Version: 2.0.9
  • SP Version: 2.3.6
Random image from folder block
« on: February 09, 2014, 04:02:59 AM »
Trying to make a right-column-block which will display one random image from a folder of images. This way I can just simply add/remove images from that folder, not have to redo code in the block, to change which images it may display.

I'm using a php block with this code within it:

Code: [Select]
<?php 

$dir 
'http://mahjong.us.com/random';
$images glob($dir'*.{jpg,jpeg,png,gif}'GLOB_BRACE);
$randomImage $images[array_rand($images)];

echo 
'<img src="'.$dir.$randomImage.'" width=188>';

?>


I'm specifying the exact folder with an entire url because I'm not sure from which directory a simpleportal php block operates from.
All I get is a question-mark placeholder for a missing image in the block.

Any help?

Thanks.

simpleportal 2.3.5
SMF 2.0.7

Offline AngelinaBelle

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  • SP Version: 2.3.2
Re: Random image from folder block
« Reply #1 on: February 09, 2014, 04:18:58 PM »
If you fully specify the URL to your image, it does not matter which directory your SMF forum is running in, for the purposes of
creating an img tag.

Please have a look at the HTML you have generated.
What is actually in the src= portion of the <img tag.  ?

Is there a file at that URL?

-----------

For more information about SMF global variables like $boarddir, please see http://wiki.simplemachines.org/smf/Global_variables
Please to keep this website running, if you like SimplePortal, make a
one-time subscription. Thank you for your support.

Have you tried the SimplePortal documentation?

Offline SMiller

  • Semi Newbie
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  • Posts: 21
  • SMF Version: 2.0.9
  • SP Version: 2.3.6
Re: Random image from folder block
« Reply #2 on: February 09, 2014, 04:51:15 PM »
Quote
Please have a look at the HTML you have generated.
What is actually in the src= portion of the <img tag.  ?

To be clear, I'm typing this code into a php block of simple portal, not an html block.

the line of code for the src= is exactly as cut and pasted from that php block:

Code: [Select]
echo '<img src="'.$dir.$randomImage.'" width=188>';
Quote
Is there a file at that URL?

Yes, I have 24 image files at that directory. Here's just one to demonstrate:

http://mahjong.us.com/random/babcock.jpg

« Last Edit: February 09, 2014, 04:56:34 PM by SMiller »

Offline AngelinaBelle

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Re: Random image from folder block
« Reply #3 on: February 09, 2014, 07:12:09 PM »
Of course!

Please look at the HTML generated by your code, and cut/paste the URL of the broken image source from your page.
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Have you tried the SimplePortal documentation?

Offline SMiller

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  • Posts: 21
  • SMF Version: 2.0.9
  • SP Version: 2.3.6
Re: Random image from folder block
« Reply #4 on: February 09, 2014, 07:28:34 PM »
Ok, the html source from that page as it loads into my browser:

Code: [Select]
<div class="sp_block"><img src="http://mahjong.us.com/random" width=188>
and the image address when you right-click on the place holder:

http://mahjong.us.com/random


edit to add: OK! That is the problem, glob can't work with a url, it needed a local directory address, so I changed the code to this:

Code: [Select]
<?php 

$dir 
'../random/';
$images glob($dir'*.{jpg,jpeg,png,gif}'GLOB_BRACE);
$randomImage $images[array_rand($images)];

echo 
'<img src="'.$dir.$randomImage.'" width=188>';

?>


And it works PERFECT!!!! YAY!!!

Thank you for getting me thinking int eh right direction!

OK, so let me take it up a notch... is there a way to add a button to this block to force it to refresh... to see a new random image?

Thanks.
« Last Edit: February 09, 2014, 11:39:42 PM by SMiller »

Offline AngelinaBelle

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  • SP Version: 2.3.2
Re: Random image from folder block
« Reply #5 on: February 10, 2014, 02:43:53 PM »
Congratulations!  You solved your problem by doing a little debugging.  That is always a good thing to do.

If you want a button to change the picture, you will have to use some javascript.
And, when the page loads, it will have to already contain that list of file names for your little bit of javascript to rotate, choose randomly, etc.
You can write this all yourself, or you can look into some image rotators that are already available out there for your convenience.
Please to keep this website running, if you like SimplePortal, make a
one-time subscription. Thank you for your support.

Have you tried the SimplePortal documentation?