How PHP gets the data submitted by the form
##1. Super global array variable: $_GET[]
Description: Get the data submitted by form method = “get”Example: $username = $_GET[“username”];2. Super global array variable: $_POST[] (Recommended learning: PHP programming from entry to proficiency)
Description: Get form method = "post" Submit DataExample: $username = $_POST[“username”];
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<META name="Generator" content="EditPlus">
<META name="Author" content="">
<META name="Keywords" content="">
<META name="Description" content="">
<style type="text/css">
</style>
<script type="text/javascript">
</script>
</HEAD>
<BODY>
<?php
var_dump($_POST); //超全局变量，$_GET $POST (数组类型)
if(isset($_POST["ac"]) && $_POST["ac"]=="login") //防止灌水，判断表单确实是自己的表单
{
$username=$_POST["username"];
$userpwd=$_POST["userpwd"];
echo("用户名是：{$username},密码是：{$userpwd}");
}
?>
<form name="form1" method="post" action="">
用户名：<input type="text" name="username" />
密码：<input type="password" name="userpwd" />
<input type="hidden" name="ac" value="login" />
<input type="submit" value="提交表单" />
</form>
</BODY>
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