php - How can I remove unwanted spaces from txt file -

i'm trying modify txt file i'm using in dokuwiki.

i generate timestamp on top of txt file this:

function filecont($file,$data) {     $filecontents = file($file);      array_shift($filecontents);     array_unshift($filecontents, $data);      $newcontent = implode("\n", $filecontents);      $fp = fopen($file, "w+");        fputs($fp, $newcontent);     fclose($fp); } 

and original txt file looks this:

now when use function:

$txt= "last generated: " . date("y m d h:i:s"); filecont($file,$txt); 

i result this:

now don't want remove ====== open iot book ======, it's because don't have empty space in first line?

but worst problem have is generates many empty spaces don't want.

i want last generated @ top of txt file , else untouched

i tested code , removed newlines changing line:

$filecontents = file($file); 

to

$filecontents = file($file, file_ignore_new_lines); 

adding file_ignore_new_lines flag stops newline being added each element/line.

http://php.net/manual/en/function.file.php.

i removed array_unshift(), leaves '====== open iot book ======' in file.

so final function looked this:

function filecont($file,$data) {     $filecontents = file($file, file_ignore_new_lines);      //array_shift($filecontents); removed preserve '====== open iot book ======' line.     array_unshift($filecontents, $data);      $newcontent = implode("\n", $filecontents);      $fp = fopen($file, "w+");      fclose($fp); }