Snippet to emulate a little loading char in terminal
<?php
$chars = ["|","/","-","\\"];
$milisecondsToWait = 100;
for($i = 0;$i < count($chars);$i++)
{
echo "\r";
echo $chars[$i];
usleep($milisecondsToWait * 1000);
if($i == (count($chars) -1)){
$i = 0;
}
}