You also have to provide in the command line the file that contains the bookmarks in a json format. It's placed on your opera folder, and it's a file called, literally, Bookmarks, without extension.

Usage: php opera25_to_html_bookmarks.php /path/to/opera/folder/Bookmarks output_file.html

So, gryzor, the script has been updated!

Now it exports all folders, even empty ones. Importing the output file has been tested with chrome. Also, I don't have imported bookmarks on Opera so I couldn't test that, but bookmarks bar are exported, even empty folders, so I guess exporting everything you have on Opera 25 developer bookmarks will work just fine, even imported bookmarks (importing import export exported imported exporting).

As previously said, you need php-cli in order to run the script. More details on the script itself.

Hope you use it, it has been a while to change it, so make it worth!

THE LINK: https://gist.github.com/alesegdia/e88f3bd23a5fd83fc3a9

hey! lol, I forgot to remove debugging stuff =D! about the script, well, I made it for my current needs, but I'll change it when I have a little time (not very sure when I'll do), I think those bookmarks are also inside that file, so I guess it'll be no problem.

I made simple a script to parse Opera 25 Bookmarks JSON file to an HTML that works imported on Chrome and should work on other browsers, since it's been based on a Firefox bookmarks html file. Read header comments in script for more details.

You need php with cli support to run the script. Hope it's of use for anyone as a workaround, as it's being for me.

The link: https://gist.github.com/alesegdia/e88f3bd23a5fd83fc3a9