Common paging functions on the Web:
What is the meaning of this sentence?
$url _query=ereg_replace ("(^|&) page= $page", "", $url _query);
(^|&)
This is the meaning of the sentence:
^ represents the starting position, or in the [^..] Non-representative;
The meaning of being or;
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(^|&) is ^ or & or what? In addition, it is not possible to appear in the URL ^ this symbol ah; why replace ^
You should add an escape character even if you want to replace ^.
Reply to discussion (solution)
^ denotes string start
& denotes characters &
^|& means starting from a string or starting with a character &
Your rule string is expected to match to:
Page=1
id=2& page=1
Empty or &??, followed by page???
Http://www.example.com/?page=1
Http://www.example.com/?action=list&page=1
Use fewer regular expressions
An empty note or a match at the beginning of A &
