php 什么是 $_SERVER['QUERY_STRING'] ？这个怎么运作？
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what is $_SERVER['QUERY_STRING'] ? how it works?
提问by asdas
$Q = explode("/", $_SERVER["QUERY_STRING"]);
What can be the possible $Q's value?
什么是可能$Q的价值？
回答by jogesh_pi
for example you have a URL in browser like this
例如你在浏览器中有一个像这样的 URL
relation.php?variable1/variable2/variable3
and you want the get the value after the ?
then $_SERVER['QUERY_STRING']helps you to determine the part the string after the ?
并且您希望获取之后的值?
然后$_SERVER['QUERY_STRING']帮助您确定字符串之后的部分?
and according to your question
并根据你的问题
$Q = explode("/", $_SERVER["QUERY_STRING"]);
variable $Qis an array with the values like
变量$Q是一个数组，其值如下
Array
(
[0] => variable1
[1] => variable2
[2] => variable3
)
回答by Rahul
If a page is accessed via any query string, $_SERVER['QUERY_STRING'] fetches that query string.
如果通过任何查询字符串访问页面，则 $_SERVER['QUERY_STRING'] 获取该查询字符串。
Example :
例子 ：
<?php
echo "The query string is: ".$_SERVER['QUERY_STRING'];
?>
If the above php code is saved with a filename of QUERY_STRING.php and if you add '?tutorial=php§ion=super-globals' (i.e. QUERY_STRING.php?tutorial=php§ion=super-globals);it will print this string in the page since you have asked the script to print $SERVER['QUERY_STRING'].
如果上面的 php 代码以 QUERY_STRING.php 的文件名保存，并且如果您添加 '?tutorial=php§ion=super-globals' (i.e. QUERY_STRING.php?tutorial=php§ion=super-globals);，它将在页面中打印此字符串，因为您已要求脚本打印 $SERVER['QUERY_STRING' ]。
For more info goto :
欲了解更多信息，请转到：
回答by Nirmal Subedi
Explode : Returns an array of strings, each of which is a substring of string formed by splitting it on boundaries formed by the string delimiter.
Explode ：返回一个字符串数组，每个字符串都是字符串的子字符串，通过在字符串定界符形成的边界上将其拆分而形成。
array explode ( string $delimiter , string $string [, int $limit ] )
数组爆炸（字符串 $delimiter ，字符串 $string [, int $limit ] ）
Run this Code to Understand :
运行此代码以了解：
/* A string that doesn't contain the delimiter will simply return a one-length array of the original string. */
$input1 = "hello";
$input2 = "hello,there";
var_dump( explode( ',', $input1 ) );
var_dump( explode( ',', $input2 ) );
The above example will output:
上面的例子将输出：
array(1)
(
[0] => string(5) "hello"
)
array(2)
(
[0] => string(5) "hello"
[1] => string(5) "there"
)
And, In Your Case, Your Current Query String will be Splited into Array. And, Each / will be a array item.
并且，在您的情况下，您当前的查询字符串将被拆分为数组。而且，每个 / 将是一个数组项。
Like if explode( '/', 'foo/bar')
就像如果爆炸（'/'，'foo/bar'）
Array will contain Foo and Bar into seperate index.
Array 将包含 Foo 和 Bar 到单独的索引中。
For More : Explode : Explode Details from PHP.NET$_SERVER : $_Server Details from PHP.NET
更多信息：爆炸：来自 PHP.NET 的爆炸细节$_SERVER：来自 PHP.NET 的 $_Server 细节
