I am currently using phped 9

What is the latest version of php I can use.

If I purchase phped 10
What is the latest version of php I can use.

If I purchase phped 11
What is the latest version of php I can use.

Although you use phped v9, you didn't purchase it. What you purchased is _SUBSCRIPTION_.
Read the terms and calcuate the date when it's over.

What Dmitri in his exuberant kindness means is that if you have a valid subscription, you can use whatever version you want. The current version is 12 (just released).

From your account you can download additional files that cover additional PHP versions. From my downloaded files I'd say that these are the PHP versions supported by PhpED:

PhpED 9: PHP 5.4.x
PhpED 10: PHP 5.5.3
PhpED 11: PHP 5.5.5
PhpED 12: PHP 5.5.5

Cheers,
Jan

Dmitri is an excellent developer which means he will lack customer service skills.

Guys, it's time to stop. We're here neither to discuss NuSphere policy nor my skills.
All "crying stories" please keep for your children.