Remove blank lines from a text file [duplicate]

Answer 1

You can do the whole thing in one go:

file_put_contents('newFile.txt',
    preg_replace(
        '/\R+/',
        "\n",
        file_get_contents('tagged.txt')
    )
);

Answer 2

Here's a foreach-based solution to just filter out empty lines (without writing to a file):

$lines = file('in.txt');
foreach ($lines as $k => $v) {
    if (!trim($v))
        unset($lines[$k]);
}

Answer 3

If the file is not too large:

file_put_contents('newFile.txt',
                  implode('', file('tagged.txt', FILE_SKIP_EMPTY_LINES)));

Answer 4

file_put_contents('newFile.txt',
    preg_replace(
        '~[\r\n]+~',
        "\r\n",
        trim(file_get_contents('tagged.txt'))
    )
);

I like \r\n :)

Answer 5

file_put_contents(
  "new_file.txt",
  implode(
    "", 
    array_filter(
      file("old_file.txt")
    ))
);

This code first reads the file to an array (file()), filters out the empty elements (array_filter) then writes them to a new file. The implode delimiter is empty, as file leaves the \n characters at the end of each line.

Answer 6

try with strpos. search for \n. if returned value is 0 you unset line