$_get,$_post,$_request区别

[Hardeman]

<?php

foreach($_POST as $key=>$val){
echo $key."==>".$val."<br>";
}

echo $_GET["username"]."<br>";
echo $_GET["password"]."<br>";

print_r($_POST);
echo "post<br>";
print_r($_GET);
echo "get<br>";
print_r($_REQUEST);
echo "request<br>";
?>

<form actiion="demo.php" method="post">
	username: <input type="text" name="username"><br>
	password: <input type="password" name="password"><br>
	<input type="submit" value="login">
</form>

不建议使用$_REQUEST.