At the end of the day, these things are tools really. Focus on your customers, product, feature-set, etc. If you find that implementing feature x is going to be

At the end of the day, these things are tools really. Focus on your customers, product, feature-set, etc. If you find that implementing feature x is going to be really difficult/impossible in PHP, look at other tools that measure up to the job. Else, stick to PHP. That is what you know and that is what you will be most productive in.