PHP Cut specific string

hy I want grab every filename for example :
I have data

01.jpg02.jpg03.jpg10599335_899600036724556_4656814811345726851_n.jpg11693824_1051832718167953_6310308040295800037_n.jpg11709788_1051835281501030_8503525152567309473_n.jpg12042832_1103685106316047_3711793359145824637_n.jpg

I'm try like this but not working for me

$str = $_POST['name'];
print_r (explode(".jpg", $str));
foreach ($str as $key => $value) {
echo $value.'<br>';
}