Default value for page_attr

[caigner]

I am using the page attribute 'alias' to switch background images like so:

Code: Select all

</__body style="background-image: url(https://www.my-domain.com/uploads/images/background/bg_{page_attr key='alias'}.jpg);">

Now, if that background image does not exist I would like to use a generic bg_default.jpg. How can this be accomplished?

[caigner]

By some trial and error I found this to work for me:

Code: Select all

{page_attr key='alias' assign='bgImage'}
{$imageName="bg_default.jpg"}

{if !file_exists("/uploads/images/background/bg_$bgImage.jpg")}
  {$imageName="bg_{$bgImage}.jpg"}
{/if}

</__body style="background-image: url(https://www.my-domain.com/uploads/images/background/{$imageName});">

It works, but I can't explain, why I have to use !file_exists.

[caigner]

Well, my joy about the solution didn't last long.
Actually it doesn't work as I expected. So I am still looking for an answer.

[caigner]

Oh, now it works. Take note of the path in the if clause: The first / was too much.

Code: Select all

{page_attr key='alias' assign='bgImage'}
{$imageName="bg_default.jpg"}

{if file_exists("uploads/images/background/bg_$bgImage.jpg")}
  {$imageName="bg_{$bgImage}.jpg"}
{/if}

</__body style="background-image: url(https://www.my-domain.com/uploads/images/background/{$imageName});">

[DIGI3]

I think you're on the right track, but need to do some troubleshooting. I think file_exists will need the full server path, not just from the web root (like /home/domain/public_html/uploads/images/etc). It might also be better to build the path as a variable first, then test it. Something like:
{$path="/path/to/$myfile"}
{if file_exists($path)}...{/if}