Yes, if PHP is appropriate to the task at hand AND you have an existing set of PHP talent in-house then it would be hard to argue that isn't an optimal solution

Yes, if PHP is appropriate to the task at hand AND you have an existing set of PHP talent in-house then it would be hard to argue that isn't an optimal solution. However, if PHP is not appropriate, that in-house PHP talent does not change the fact that PHP is the wrong tool.