Who said PHP was a good tool? I'm responding to the parent comment asserting that being a better programmer won't help you, which is clearly not true. All our tools are deficient to a greater or lesser extent, and part of what defines the skill of a programmer is working with the tools you have, working around their deficiencies, and resisting the urge to engage in architecture astronautism.

If you have a choice, sure, don't use PHP. But if you don't have a choice, PHP won't stop you shipping a quality product.