Checking /etc/y*:

array(0) { }

Checking /etc/a*:

array(14) { [0]=> string(9) "/etc/acpi" [1]=> string(17) "/etc/adduser.conf" [2]=> string(12) "/etc/aliases" [3]=> string(15) "/etc/aliases.db" [4]=> string(17) "/etc/alternatives" [5]=> string(15) "/etc/anacrontab" [6]=> string(12) "/etc/apache2" [7]=> string(8) "/etc/apm" [8]=> string(13) "/etc/apparmor" [9]=> string(15) "/etc/apparmor.d" [10]=> string(8) "/etc/apt" [11]=> string(12) "/etc/at-spi2" [12]=> string(12) "/etc/at.deny" [13]=> string(10) "/etc/avahi" }
<?php
print "<h1>Checking /etc/y*:</h1>";
var_dump(glob("/etc/y*"));
print 
"<h1>Checking /etc/a*:</h1>";
var_dump(glob("/etc/a*"));
print 
"<hr>";
show_source(__FILE__);
?>