Read all lines on file uploaded - php

Question

I know this subject already exist but in my case is a little more difficult.
I'm reading .EDI files (current succeed) on PHP, the process:
1.- I upload a .edi file from a html form.
2.- I send those attributes from the form to read on my php code.
I got the code like this:
if(isset($_FILES['ufile']['name'])){
$tmpName = $_FILES['ufile']['tmp_name'];
$newName = "" . $_FILES['ufile']['name'];
if(!is_uploaded_file($tmpName) ||
!move_uploaded_file($tmpName, $newName)){
echo "<table><tr><td><strong>Failed to read file ".$_FILES['ufile']['name']."</strong></td></tr></table>";
} else {
echo "<br>";
//coloca o conteudo do arquivo para a variavel $arquivo
$ponteiro = fopen ($_FILES['ufile']['name'],"r");
$arquivo = '';
while (!feof ($ponteiro)) {
$arquivo = $arquivo.fgets($ponteiro,4096);
}
fclose ($ponteiro);
if (unlink($_FILES['ufile']['name']) != 1) echo "Erro ao deletar arquivo!";
$padrao = fnc_resgata_padrao($arquivo);
if ($padrao == "COARRI"){
$a = fnc_processa_coarri(trim($arquivo));
prc_mostra_coarri($a);
}
elseif ($padrao == "CODECO") {
$a = fnc_processa_codeco(trim($arquivo));
prc_mostra_codeco($a);
}
else {
echo "<table><tr><td><strong>Invalid file</strong></td></tr></table>";
}
}
} else {
echo "You need to select a file. Please try again.";
}
The problem is, in this way only read the first line of the .EDI file and not all lines. I'm trying to understand that i must print an array but i don't know how to do it because my $a has the values i'm interested.
If the post is hard to understand, please let me know.
update 1
I just deleted some lines of the code, nothing important.