replace blank lines in php

Question

How do I remove multiple blank lines from a string. I have looked at the examples on stackoverflow and have tried to change my code accordingly but I am not getting the rig

Answer 1

also put a trim on it:

   function removeMultipleBlankLines(&$array) {
      return trim(preg_replace("/(^[\r\n]*|[\r\n]+)[\s\t]*[\r\n]+/", "\n", $array));
    }

Answer 2

try this:

$string = str_replace("\r\n",'',$string);

Answer 3

why not $string = trim($string);?

you can even specify what you want to be trimmed with a second optional parameter, that is trim ( string $str [, string $charlist ] ) see the docs http://php.net/manual/en/function.trim.php

Answer 4

You can do:

$array_with_nonblank_lines = array_filter($textarray, 'trim');

to get exactly what you want.

Here is link to php's docs page about trim function, which does the job.

Answer 5

Try this one:

$str =preg_replace("/(^[\r\n]*|[\r\n]+)[\s\t]*[\r\n]+/", "\r\n", $str);

The output file will give same output on simple notepad and also on text editors eg Notepad++.

Answer 6

Using regular expressions works, but some people unfamiliar with regular expressions could get confused as to how you lay out your expression. Using the familiar trim command is simply a better choice in my opinion, but in the end I think trim would be faster because it doesn't need to evaluate the regular expression etc.