Remove resolution string from image url in PHP

Question

I have following image url:

http://www.example.org/wp-content/blogs.dir/29/files/2013/02/Personalized-Results-Asterisk-600x417.png

Here url con

Answer 1

$str=preg_replace("/^(.+)-\d+?x\d+?(\.\w+)$/i","$1$2",$str);