Hello sorry for my poor English.

My problem : I use base64_encode to encode a file for send by E-mail. I use the following code to find the problem.
$file=$name1;
$fp=fopen($file,"r");
$temoin="./temoin/".time();
$fq=fopen ($temoin,"w");
$attachmentorig=fread($fp,filesize($file));
$attachment=base64_encode($attachmentorig);
$controle= "file name :".$file."\r\n file size:".filesize($file)."\r\n file content:".$attachmentorig."\r\n file encoded :".$attachment.
fclose($fp);
fwrite ($fq,$controle);
fclose ($fq);
So sometimes, Name, size, file content are exactly the sames, but file encoded is different. Can you explain me please ?