Pop up window ?

I don't think if its possible to generate popups with only PHP. You can use Javascript to achieve this.

you can use this code to open a new window. but not php...
window.open('new-window.php','mywindow','width=550,height=420')

If the link is <a href=\"modules.php?name=News&file=article&sid=$sid&page=$next_pagenumber ... > </a> Name

how to make the pop up window after the click? Thanks!

You can make the browser window a certain size via JS as mentioned. php can't do this, as it's done before the browser gets it. ditty has it.

Depending on the content, you could always use a "faux-window", by using jQuery dialog or similar.

Please ignore the size of window, I just want to have pop up window by the above mentioned link!

just use the attribute: target="_blank" in your <a> tag.

To insert the javascript on the link, do an onclick event.

<a href="http://www.java2s.com" onClick='window.open('new-window.php','mywindow','width=550,height=420')'>www.java2s.com</a>

More information regarding the topic at: http://www.java2s.com/Tutorial/JavaScript/0420__HTML-Tags/LinkonClick.htm