I agree completely. It's why I started using PHP and why I continue to use it.
I think the only thing around right now with a realistic shot of replacing PHP is JavaScript with node.js, but it will require widespread deployability. If and when node.js becomes easy to deploy on cheap hosts it has a huge number of wins over PHP (to begin with -- one less language to learn, and then even more importantly node.js understands the web page it's buildings and no other server-side language does this).
I think the only thing around right now with a realistic shot of replacing PHP is JavaScript with node.js, but it will require widespread deployability. If and when node.js becomes easy to deploy on cheap hosts it has a huge number of wins over PHP (to begin with -- one less language to learn, and then even more importantly node.js understands the web page it's buildings and no other server-side language does this).