output buffer

I try to buffer a page. But it send output before my "echo $content" command. How can i disable this?
echo $content; //I want to send output just this command....

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Is  that the only files that's loaded? Look for blank lines in other files if that's not the case.

Finally, check for UTF BOM (some hiding characters at the very beginning of a file that identifies it a UTF-encoded). You may want to look for the UTF-encoding related settings in your text editor. PHP doesn't handle these bits very well, and they may be the ones causing problem.
erenpasaAuthor Commented:
i've looked my file but it's seem normal.can you upload a small file for me?
is my code run at your system?
If it's a UTF BOM issue, yes, your file will look normal. As stated, the BOM is hidden in common text editor, so it looks like there is nothing at the first line. So you really need to look at your editor's settings to see if UTF BOM is enabled or not. If it is, you want to turn it off, and save your file making sure it doesn't use UTF BOM marking.

That's one of the possible problem.

Another reason might be that you use ob_get_flush() which returns the buffer's content AND output it to the client. Look at ob_get_clean() (PHP5) or ob_get_contents() / ob_end_clean() (PHP4) otherwise.

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Whe you call ob_get_flush(); The buffer is outputted;
Instead use ob_get_clean(); if you need to cleand the buffer after get the content;
or ob_get_contents(); if you need the buffer intact;
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