Open PH File
The PH extension is used for a type of header file that can be referenced by one or more Perl (.PL) scripts.
About PERL
Perl is a family of two high-level, general-purpose, interpreted, dynamic programming languages.
PERL 5 and PERL 6, which is a sister to PERL 5, before PERL 6's name was officially changed to Raku in October 2019.
Raku is basically a 'blender' as it introduces elements from many modern and historical languages.
Raku is PERL compliant, however this was not intended, even though it was part of the specification.
The PH file contains Perl code that can include variable and function declarations, being similar to a C header file with extension H, but used by Perl programs.
It is important to note that PH files are often referenced within other Perl files.