php大神们,下面的代码是什么意思呢?主要是起什么作用?谢谢

2013 年 4 月 21 日3490

<?php
session_start();
header('Content-Type:text/html;charset=gb2312');
include_once("conn/conn.php");
if (!empty($_GET['name']) && !is_null($_GET['name'])){
//激活注册用户
$num=$conne->getRowsNum("select * from tb_member wherename']."' and password = '".$_GET['pwd']."'");
if ($num>0){
$upnum=$conne->uidRst("update tb_member set active = 1 wherename']."' and password = '".$_GET['pwd']."'");
if($upnum > 0){
$_SESSION['name'] = $_GET['name'];
echo "<script>alert('用户激活成功!');
window.location.href='main.php';
</script>";
}else{
echo "<script>alert('您已经激活!');
window.location.href='main.php';
</script>";}
}else{
echo "<script>alert('用户激活失败!');
window.location.href='register.php';
</script>";}
}
?>

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