Truncated PHP example code in the html2 generated client

[david-vde]

Description

When I generate the HTML2 client, we have a lot of code example for several languages. All langages examples looks great except for PHP. A part of the PHP code is truncated above

Swagger-codegen version

Current one.

Steps to reproduce

Simply generate an html2 client and check the PHP code example.

Thanks.

[wing328]

@David-Vander-Elst thanks for reporting the issue. May I know if you've time to contribute the enhancements?

[david-vde]

it looks like this is simply an opened tag at line 3 witch is commented and not the closed one.
I'm not able to test it right now as I'm a PHP developer only, but I can try later to set an environment, but not my priority right now.

This should resolve it;
#4212

The opening PHP tag seems to be screwing up the HTML, and tbh its not really needed anyway in this context so I removed it. I may look into it in more detail in the future as it could cause issues with new languages

[wing328]

PR merged into master. Please pull the latest master to give it a try.