如何从PHP中的URL获取具有相同名称的多个参数 [英] How to get multiple parameters with same name from a URL in PHP

问题描述

我有一个PHP应用程序，有时必须处理URL，其中URL中的多个参数具有相同的名称.是否有一种简单的方法来检索给定键的所有值? PHP $ _GET仅返回最后一个值.

I have a PHP application that will on occasion have to handle URLs where more than one parameter in the URL will have the same name. Is there an easy way to retrieve all the values for a given key? PHP $_GET returns only the last value.

具体来说，我的应用程序是一个OpenURL解析器，并且可能会获得如下URL参数:

To make this concrete, my application is an OpenURL resolver, and may get URL parameters like this:

ctx_ver=Z39.88-2004
&rft_id=info:oclcnum/1903126
&rft_id=http://www.biodiversitylibrary.org/bibliography/4323
&rft_val_fmt=info:ofi/fmt:kev:mtx:book
&rft.genre=book
&rft.btitle=At last: a Christmas in the West Indies. 
&rft.place=London,
&rft.pub=Macmillan and co.,
&rft.aufirst=Charles
&rft.aulast=Kingsley
&rft.au=Kingsley, Charles,
&rft.pages=1-352
&rft.tpages=352
&rft.date=1871

(是的，我知道这很丑陋，欢迎来到我的世界).请注意，键"rft_id"出现了两次:

(Yes, I know it's ugly, welcome to my world). Note that the key "rft_id" appears twice:

1. rft_id=info:oclcnum/1903126
2. rft_id=http://www.biodiversitylibrary.org/bibliography/4323

1. rft_id=info:oclcnum/1903126
2. rft_id=http://www.biodiversitylibrary.org/bibliography/4323

$_GET将仅返回http://www.biodiversitylibrary.org/bibliography/4323，而先前的值(info:oclcnum/1903126)已被覆盖.

$_GET will return just http://www.biodiversitylibrary.org/bibliography/4323, the earlier value (info:oclcnum/1903126) having been overwritten.

我想同时访问这两个值.这在PHP中可行吗?如果没有，对如何处理此问题有任何想法吗?

I'd like to get access to both values. Is this possible in PHP? If not, any thoughts on how to handle this problem?

推荐答案

类似的东西

$query  = explode('&', $_SERVER['QUERY_STRING']);
$params = array();

foreach( $query as $param )
{
  // prevent notice on explode() if $param has no '='
  if (strpos($param, '=') === false) $param += '=';

  list($name, $value) = explode('=', $param, 2);
  $params[urldecode($name)][] = urldecode($value);
}

给您

array(
  'ctx_ver'     => array('Z39.88-2004'),
  'rft_id'      => array('info:oclcnum/1903126', 'http://www.biodiversitylibrary.org/bibliography/4323'),
  'rft_val_fmt' => array('info:ofi/fmt:kev:mtx:book'),
  'rft.genre'   => array('book'),
  'rft.btitle'  => array('At last: a Christmas in the West Indies.'),
  'rft.place'   => array('London'),
  'rft.pub'     => array('Macmillan and co.'),
  'rft.aufirst' => array('Charles'),
  'rft.aulast'  => array('Kingsley'),
  'rft.au'      => array('Kingsley, Charles'),
  'rft.pages'   => array('1-352'),
  'rft.tpages'  => array('352'),
  'rft.date'    => array('1871')
)

由于总是有可能重复一个URL参数，所以最好总是具有数组，而不是仅对那些预期它们的参数进行重复.

Since it's always possible that one URL parameter is repeated, it's better to always have arrays, instead of only for those parameters where you anticipate them.

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