PHP/Utility Function/ ENV

Reading an environment variable, $_ENV["USER"]

 
<?php
$name = $_ENV["USER"];
?>

Reading another environment variable,$_ENV["HOME"]

 
<?php
print $_ENV["HOME"];
?>

Reading Environment and Configuration Variables

 
<?php 
echo $_ENV["ProgramFiles"] . "<br />"; 
echo $_ENV["COMPUTERNAME"] . "<br />"; 
echo getenv("COMPUTERNAME") . "<br />"; 
echo ini_get ("post_max_size") . "<br />"; 

print_r (ini_get_all()); 
?>

Setting Environment and Configuration Variables

 
<?php
  echo $_ENV["COMPUTERNAME"] . "<br />"; 
  $_ENV["COMPUTERNAME"] = "Hello World!";
  echo $_ENV["COMPUTERNAME"] . "<br />"; 
  echo ini_get ("post_max_size");
  
  ini_set("post_max_size","200M");
?>