sl/env_var.php


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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Test</title>
</head>
<body>
<?php
echo '<br />My $_ENV APP_MODE is ' . $_ENV["APP_MODE"] . '!';
echo '<br />My $_SERVER APP_MODE is ' . $_SERVER["APP_MODE"] . '!';
?>
</body>
</html>