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1. $_GET
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http://localhost/a.php?a=ok
<?
echo
$_GET['a']; //ÏÔʾ"ok"
?>
2. $_SERVER['QUERY_STRING']
http://localhost/a.php?a=1&b=2&c=3
a.php
<?
echo $_SERVER['QUERY_STRING']; //out
a=1&b=2&c=3
?>
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register_globals µÄֵΪ off
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$_SERVER['DOCUMENT_ROOT']
´úÌæ $DOCUMENT_ROOT
£¬ÓÖÈ磬ʹÓà $_GET['id']
À´´úÌæ $id
´Ó URL http://www.example.com/test.php?id=3
ÖлñÈ¡ id Öµ£¬Òà»òʹÓà $_ENV['HOME']
À´´úÌæ $HOME
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<html>
<head>
</head>
<body>
<?php
//echo $_SERVER['QUERY_STRING'];
if(isset($_GET["id"]))
{
$b = $_GET["ix"];
$b +=1;
}else
{
$b = 7;
}
echo $b;
?>
<input type="button" value = "aaaaa" onclick = "aaa();">
</body>
<script>
function aaa(){
window.location="test.php?id=7&ix=<?php echo $b?>";
}
</script>
<html>
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