I have downloaded Easyrdf, the release of the 2020-07-14 from here https://www.easyrdf.org/downloads and installed it.
When I try to view example ListOfCountries.php for example, I have this error message:
This file html_tag_helpers.php is not present on the directory structure.
Warning: require_once(C:\xampp\htdocs\websemantique\ex1/html_tag_helpers.php): failed to open stream: No such file or directory in C:\xampp\htdocs\websemantique\ex1\index5.php on line 20
Fatal error: require_once(): Failed opening required 'C:\xampp\htdocs\websemantique\ex1/html_tag_helpers.php' (include_path='C:\xampp\php\PEAR') in C:\xampp\htdocs\websemantique\ex1\index5.php on line 20
I have just downloaded easyrdf-1.0.0.tar.gz, to double check, and the file 'html_tag_helpers.php' is in the examples directory.
You can also find a copy of the file here:
Note that the HTML Tag Helpers are just to make the examples more
concise and don't do any RDF functions.