PHP正则表达式替换字符串中的数字

Question

I'm trying to replace a number in a string with another number by using regex. This should be super simple, but for some reason it's giving me grief today. "feed" in the string is dynamic and can contain letters or numbers only.

Here is what I've tried:

$new_number = 999;
$string = '/feed/page/1/?param=true';
preg_replace('/\/([0-9a-z])\/page\/([0-9])\/(.*)/i', '/$1/page/'.$new_number.'/$3', $string);

Should output: '/feed/page/999/?param=true'

Answer 1

forgetting the +'s, are you? :P Try this as your regEx:

'/\/([0-9a-z]+)\/page\/([0-9]+)\/(.*)/i' 

Answer 2

尝试这个：

\/([0-9a-z]{1,})\/page\/([0-9]{1,})\/(.*)