fwrite - PHP - Trying to re-write a file and it's leaving blank spaces -

hello have issue when re-writting file:

static function remove($plate){      $_parkedlist=parking::read();     $_remove = false;     $_stillparkedlist = array();      foreach($_parkedlist $_car){          if($_car[0] == $plate){              $_firsttime = $_car[1];             $_now = date('y-m-d h:i:s');             $_timelapse = strtotime($_now) - strtotime($_firsttime);               $_topay = $_timelapse * 10;              echo "$_topay <br>";              $_remove = true;           } else {              $_stillparkedlist [] = $_car;          }     }      if ($_remove == true){          $mifile = fopen('parked.txt',"w");          foreach($_stillparkedlist $_car){                  if($_car[0]!=""){                      $_line = $_car[0]."=>".$_car[1]."\n";                            fwrite($mifile,$_line);             }          }          fclose($mifile);     } } 

the original file this:

234fsc=>2016-09-07 17:06:23 jag823=>2016-09-07 17:06:15 706khb=>2016-09-07 17:06:15 980ghb=>2016-09-07 17:06:15 

the first time remove adds blank spaces (removed 706khb)

234fsc=>2016-09-07 17:06:23  jag823=>2016-09-07 17:06:15  980ghb=>2016-09-07 17:06:15 

if remove again starts showing "notice: undefined offset: 1 in ...\parking.php" , file looks this

234fsc=>2016-09-07 17:06:23  => jag823=>2016-09-07 17:06:15  => 980ghb=>2016-09-07 17:06:15  => 

i have tried find still happening if($_car[0]!="") , isset($_car[0]!)

how can re-write without error?

i assume each line read file newline attached it.

so when execute line

$_line = $_car[0]."=>".$_car[1]."\n";  

it adding newline instead do

$_line = $_car[0]."=>".$_car[1];  

so not adding newline