PHP language server

This folder contains the deployment files for the PHP language server.

You can enable it by:

Append the kubectl apply command for the PHP language server deployment to kubectl-apply-all.sh.

echo kubectl apply --prune -l deploy=xlang-php -f configure/xlang/php/ --recursive >> kubectl-apply-all.sh

Adding the following environment variables to the lsp-proxy deployment to make it aware of the PHP language server's existence:
```
# base/lsp-proxy/lsp-proxy.Deployment.yaml
env:
  - name: LANGSERVER_PHP
    value: tcp://xlang-php:2088
```
Apply your changes to lsp-proxy and the PHP language server to the cluster.
```
./kubectl-apply-all.sh
```