Variabel bawaan PHP yang bisa diakses dari mana saja.
$_GET — parameter URL$_POST — data form POST$_REQUEST — gabungan GET/POST$_SERVER — info server dan request$_SESSION — data session$_COOKIE — cookies$_FILES — file upload$_ENV — environment variables$GLOBALS — semua variabel global<?php
// $_SERVER info
echo "Server Info:
";
echo "PHP_SELF: " . ($_SERVER['PHP_SELF'] ?? '/index.php') . "
";
echo "SERVER_NAME: " . ($_SERVER['SERVER_NAME'] ?? 'localhost') . "
";
echo "REQUEST_METHOD: " . ($_SERVER['REQUEST_METHOD'] ?? 'GET') . "
";
echo "HTTP_USER_AGENT: " . substr($_SERVER['HTTP_USER_AGENT'] ?? 'Browser', 0, 50) . "
";
// Simulating $_GET
// URL: page.php?name=Ali&age=25
$name = "Ali"; // $_GET['name']
$age = 25; // $_GET['age']
echo "GET params: name=$name, age=$age
";
// Form handling
echo "Form Example:
";
echo '<form method="post" action="process.php">';
echo ' <input name="email" type="email">';
echo ' <button type="submit">Submit</button>';
echo '</form>';
?>