Re: Remove blank lines from a file

Nathan Rixham wrote:

Robert Cummings wrote:

tedd wrote:

At 1:02 PM -0400 5/22/10, Robert Cummings wrote:

tedd wrote:

If that is all (i.e., removing double linefeeds), then this will do it: $text_array = array(); $text_array = explode("\n\n", $input_text); $output_text = implode("\n",$text_array);

Sorry tedd, this is broken. It doesn't solve problems with runs of greater than 2 newlines which is even in the example :) I would use the following instead which is also line break agnostic with final output in the style for your system: <?php $data = preg_replace( "#[\r\n]+#", PHP_EOL, $input ); ?> Cheers, Rob.

Rob: It's not broken according to my "given", which was "If that is all (i.e., removing double linefeeds), then this will do it:" My code does exactly what was stated.

Actually, his comment didn't say double line feeds... his comment said I want THIS to look like THAT. And THIS had a triple line feed and THAT completely normalized it to a single line feed. I realize you misunderstood the problem, but where I work, clients don't think a solution based on incorrect presumptions is a valid solution for a clearly defined problem :)

I did not catch there were more than two linefeeds in the OP's problem. Doing more was something I did not address. Also, the solution you provided works better this way: :-) $input = preg_replace( "#[\r\n]+[[:space:]]+[\r\n]+#", "\n", $input ); $input = preg_replace( "#[\r\n]+#", PHP_EOL, $input ); $input = trim( $input );

preg_replace( "/(\s)\s+/im", '\\1', $input ); :)

ahh just read the rest of this thread.. icnase it gets a bit pedantic then here's a horizontal white space only one: preg_replace( "/(\h)\h+/im", '\\1', $input ); and vertical only: preg_replace( "/(\v)\v+/im", '\\1', $input ); (spot a pattern?) Best, Nathan