i use implode,page very slow,why?

[xixi]

when I use "include" to call php files, they can only be displayed at the top of page. how to displayed them on other place?

[xixi]

Help me,please!!!

[xixi]

What I do?
Please tell me!!!...

[xixi]

but no use implode
page very fast!!!

[xixi]

i use implode,page very slow,why?

[xixi]

no
because

$news = implode("\n",file("$bburl/news.php")); 

use:
ob_start();
require("news.php");
$news= ob_get_contents();...

[xixi]

display very slow!!
why?...

[xixi]

use it,my page very slow
why?