$query = mysql_query( select * from 表名 where id='$_GET[id]'

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$query = mysql_query( select * from 表名 where id='$_GET[id]' )中'$_GET[id]'是什么意思?

$_GET是PHP中的预设数组,通过GET方法访问网站的话,GET提交的数据就会保存在$_GET数组中
比如我现在访问的网址是
http://zhidao.baidu.com/question/258023076.html?push=cookie
如果后台是PHP的话,则
$_GET数组里会有一个
$_GET['push'],对应的值是'cookie'
如果你访问的是
http://localhost/abc.php?id=123&name=defg&action=select
则$_GET数组里就会有
$_GET['id] = 123
$_GET['name'] = 'defg'
$_GET['action'] = 'select'
这样看懂了吗?

$query = mysql_query( select * from 表名 where id='$_GET[id]' $id = isset($_GET['id']) ? $_GET['id'] : ''; 这句是什么意思? $id="select id from account where name='".$_SESSION['login'] sql 中 select * from A left join B on A.id=B.id where A.id=?如 select id,name from student where id in ( select id from sco 请教sql语句,像select …from wsdy_zb t where t.id =:id order by no sql如何取交集有这样两条sql语句select distinct id from a where id='123'se $query = "SELECT * FROM student_info WHERE name = '".$login_ select ** from A where A.id in (select id from B where ****) sql="select * from "&data&" where id="&myid&"" 在数据库中没有data 这 SELECT COUNT(*) FROM Users WHERE Id={0} AND LoginPwd = '{1}' select distinct id from names where tid = 'AREACODE' And dsc