strange ^M at file name

[root@file Engineer]# ls resume_Al_Kassar_9-29-08.doc.txt^M
resume_Al_Kassar_9-29-08.doc.txt?
[root@file Engineer]#

$toF = bashFileConvert($toF);//this step generated ^M
$cmd = "$parser $file $arrow_str $toF";

$arrow_str = $arrow ? '>' : '';
$file = bashFileConvert($file);
$toF = bashFileConvert($toF);
$cmd = "$parser $file $arrow_str $toF";
echo $cmd . "rn";
file_put_contents('resumeSh',$cmd."rn",FILE_APPEND);

$data = str_replace("rn", "n", $data);
$data = str_replace("r", "n", $data);