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removing carriage returns/line feeds/line breaks

Posted by Stooshie (Stooshie), 13 March 2006
Hi there,

I am currently working on code to publish a flat xhtml page by parsing a second php page that takes content from a database (the flat page loads quicker for the public).

Anyway, I have the following code to reduce the size of the page a little.
                       foreach($fin as $num => $line)
                             $line = ereg_replace("/\n\r|\r\n|\n|\r/", "", $line);
                             $line = preg_replace("/\t/", "", $line);
                             fwrite($fout, $line);

However, the output is all on one line and older browsers may struggle with this.

What I would ideally like is to replace 2 or more carriage returns, line feeds or line breaks with 1 line break.

I've tried things like:
$line = ereg_replace("/[\n|\r|\n\r|\r\n]{2,}/", "\n", $line);

but to no avail.

I've been struggling with this regular expression for a while and my head is now sore!! .

Any ideas.



ps. I know the second regular expression to remove tabs can probably be added to the first one, but I was trying to get the first one working before I attempt that.

Posted by admin (Graham Ellis), 13 March 2006
At first glance, I would replace all the new lines and returns with a tab and then replace all groups of 2 or more tabs with a new line. That way, you're left with single tabs or single new lines.

Code would look something like this:

$line = ereg_replace("[\n\r]", "\t", $line);
$line = ereg_replace("\t\t+", "\n", $line);

This page is a thread posted to the opentalk forum at and archived here for reference. To jump to the archive index please follow this link.

Comment: "I agree that ereg should be replaced by preg functions. ..."
Visitor Ranking 3.3 (5=excellent, 1=poor)

Comment by Graham Ellis (published 2011-02-18)
I agree that ereg should be replaced by preg functions. Note that this page is a blog archive dating from six years ago .... I'm adding this note as an alert to people reading the page, rather than going back and altering history. [#3890]

Comment by Interesting Articles (published 2011-02-18) Suggested link.
Avoid this at all costs. ereg() is depreciated and is being removed from php, use preg_match instead. [#3887]

Comment by Anon (published 2011-01-16)
Good information, but the code example font size is too small [#3826]

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