Re: Remove blank lines from a file

Nathan Rixham wrote:

Robert Cummings wrote:

Nathan Rixham wrote:

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?)

Hi Nathan, You may want to start testing your solutions. None have worked yet. Not even close :)

filed under 'works for me' <?php $input = 'blah b asd as d asd a sd da asd d asd

    da';

echo preg_replace( "/(\s)\s+/im", '\\1', $input ); on PHP/5.2.8 produces: blah b asd as d asd a sd da asd d asd da unless I'm completely missing the elephant in the room here!

Doesn't appear to work on the following: $input = ' 1 2 3 4 5 6'; Additionally, your solution modifies lines that weren't asked to be modified :) I realize it potentially makes for a more succinct solution (if you ever get it to work properly in the general case) but it is not a valid solution for the requested functionality-- The OP did not ask for trimming of lines with content ;) Cheers, Rob. -- E-Mail Disclaimer: Information contained in this message and any attached documents is considered confidential and legally protected. This message is intended solely for the addressee(s). Disclosure, copying, and distribution are prohibited unless authorized.