Why code using $_ENV doesn't giving output?

Question

<?php
echo'<table border="1">';
foreach($_ENV as $k=>$v)
{
echo'<tr><td>'.$k.'</td><td>'.$v.'</td></tr>';
}
echo'</table>';
?>

this is the whole simple code .

Answer 1

That check if in the php.ini by variables_order contains the "E" ... also "EGPCS" NOT "GPCS" ?

Answer 2

i think its not allowed to use by php.ini
Why you want to use $_EnV?
Read the comments on the site below Maybe it can solve your Problem? https://secure.php.net/manual/de/reserved.variables.environment.php

Answer 3

I need to know its use..