- explode: documentation ( source)
- trim: documentation ( source)
<?php
$nums = "
95626372
95626380
95626422
95626435
95626460
";
$nums = explode("\n", trim($nums));
for ($i = 1; $i < count($nums); $i++) {
echo $nums[$i-1] - $nums[$i];
echo "\n";
}