[PHP] Bug generating client SDK has invalid PHP code

Description

Invalid code is generated when creating a PHP client SDK from a URL. I have made some minor updates to the URL and auth to remove sensative information. I created a gist of the JSON config file that is at the URL and the link is below.

Thank you for the help,
Ken Grigsby

Swagger-codegen version

2.4.31-SNAPSHOT
Unfortunately, I cant use V3 because we are using an internal PHP 7 server.

Swagger declaration file content or url

https://gist.github.com/kengrigsby/885b74d7e61727e0c0fd9ebeeec6c031

Command line used for generation

java -jar swagger-codegen/modules/swagger-codegen-cli/target/swagger-codegen-cli.jar generate \
    -i "https://windchill.com/Windchill/netmarkets/html/wrs/odata-to-swagger.jsp?v=2&d=BACMgmt" \
    -l php \
    --model-name-prefix "WindchillApiBACMgmt" \
    -o "/home/ABC/kgrigsby/windchillApiClassGeneration/swagger-codegen/generatedClasses/BACMgmt" \
    -a "Authorization:Basic [**redacted**]" \
    -c /home/ABC/kgrigsby/windchillApiClassGeneration/config.json \
    -Dio.swagger.parser.util.RemoteUrl.trustAll=true \
    -Dio.swagger.v3.parser.util.RemoteUrl.trustAll=true \
    --git-repo-id=not_used \
    -DcomposerVendorName=testingwindchill,ProjectName=windchillapi;

config.json

{
    "variableNamingConvention":"camelCase"
}

Steps to reproduce

1. Executed the generate command.
2. This PHP code is not valid in file SwaggerClient-php/lib/Api/ServiceEndpointsApi.php
   $resourcePath = '/BACReceivedDeliveries('{BACReceivedDeliveryId}')';
3. This code is repeated in all of the request functions
   protected function deleteBACReceivedDeliveryRequest($bACReceivedDeliveryId, $cSRFNONCE = null)

Related issues/PRs

I didn't find any.

Suggest a fix/enhancement

I don't know what this code should look like.
$resourcePath = '/BACReceivedDeliveries('{BACReceivedDeliveryId}')';

Maybe escaping the single quotes by adding the "\" character before the single quotes that are in the string.
$resourcePath = '/BACReceivedDeliveries(\'{BACReceivedDeliveryId}\')';

Start by reproducing the PHP client with the listed swagger-codegen CLI command and inspect SwaggerClient-php/lib/Api/ServiceEndpointsApi.php, especially the generated $resourcePath and deleteBACReceivedDeliveryRequest method. Done means the generated file contains valid PHP syntax and all repeated request functions use valid resource paths.