yöntem 1;
$metin='905051234567 1 
905321234567 3 
905351234567 4 
905431234567 1 
905421234567 0'; 

$metin = split("[\r\n]", trim($metin));
print_r($metin);
yöntem 2;
$metin='905051234567 1 
905321234567 3 
905351234567 4 
905431234567 1 
905421234567 0'; 

$metin = preg_split("/[\r\n]+/",$metin); 
print_r($metin);
yöntem 3;
$metin='905051234567 1 
905321234567 3 
905351234567 4 
905431234567 1 
905421234567 0'; 

$metin = explode(PHP_EOL, preg_replace("/[\r\n]+/", PHP_EOL, trim($metin)));
print_r($metin);
çıktı;
Array
(
    [0] => 905051234567 1 
    [1] => 905321234567 3 
    [2] => 905351234567 4 
    [3] => 905431234567 1 
    [4] => 905421234567 0
)