Php 如何检测给定URL是否为当前URL?
我需要检测提供的URL是否与当前导航到的URL匹配。请注意,以下所有URL都是有效的,但在语义上是等效的:Php 如何检测给定URL是否为当前URL?,php,regex,url,Php,Regex,Url,我需要检测提供的URL是否与当前导航到的URL匹配。请注意,以下所有URL都是有效的,但在语义上是等效的: https://www.example.com/path/to/page/index.php?parameter=value https://www.example.com/path/to/page/index.php https://www.example.com/path/to/page/ https://www.example.com/path/to/page http://www.
https://www.example.com/path/to/page/index.php?parameter=value
https://www.example.com/path/to/page/index.php
https://www.example.com/path/to/page/
https://www.example.com/path/to/page
http://www.example.com/path/to/page
//www.example.com/path/to/page
//www/path/to/page
../../../path/to/page
../../to/page
../page
./
如果给定URL指向当前页面,则最后一个函数必须返回true
,否则返回false
我没有预期URL的列表;这将用于只希望在链接到当前页面时禁用链接的客户端请注意,我希望忽略参数,因为这些参数并不表示此站点上的当前页面。我使用了以下正则表达式:
/^((https?:)?\/\/www(\.example\.com)\/path\/to\/page\/?(index.php)?(\?.+=.*(\&.+=.*)*)?)|(\.\/)$/i
其中https?
,www
,\.example\.com
,\/path\/to\/page
,和index.php
通过$\u服务器[“php\u SELF”]
动态检测,并生成正则表达式,但与./../to/page
等相对URL不匹配
编辑:我对正则表达式有了进一步的了解:
现在,我只需要PHP为任何给定页面动态创建正则表达式。实际上不需要正则表达式来去除所有查询参数。您可以使用: 要检查URL数组的输出,请执行以下操作:
$url_list = <<<URL
https://www.example.com/path/to/page/index.php?parameter=value
https://www.example.com/path/to/page/index.php
...
./?parameter=value
./
URL;
$urls = explode("\n", $url_list);
foreach ($urls as $url) {
$url = strtok($url, '?'); // remove everything after ?
echo $url."\n";
}
您可以使用以下方法:
function checkURL($me, $s) {
$dir = dirname($me) . '/';
// you may need to refine this
$s = preg_filter(array('~^//~', '~/$~', '~\?.*$~', '~\.\./~'),
array('', '', '', $dir), $s);
// parse resulting URL
$url = parse_url($s);
var_dump($url);
// match parsed URL's path with self
return ($url['path'] === $me);
}
// your page's URL with stripped out .php
$me = str_replace('.php', '', $_SERVER['PHP_SELF']);
// assume this is the URL you are matching against
$s = '../page/';
// compare $me with $s
$ret = checkURL($me, $s);
var_dump($ret);
现场演示:过去几天我一直在做这项工作,我并不是坐在那里等待答案。我已经想出了一个在我的测试平台上工作的方法;其他人怎么想?它感觉有点臃肿,但也感觉防弹 调试回显,以防你想回显一些东西
global $debug;$debug = false; // toggle debug echoes and var_dumps
/**
* Returns a boolean indicating whether the given URL is the current one.
*
* @param $otherURL the other URL, as a string. Can be any URL, relative or canonical. Invalid URLs will not match.
*
* @return true iff the given URL points to the same place as the current one
*/
function isCurrentURL($otherURL)
{global $debug;
if($debug)echo"<!--\r\nisCurrentURL($otherURL)\r\n{\r\n";
if ($thisURL == $otherURL) // unlikely, but possible. Might as well check.
return true;
// BEGIN Parse other URL
$otherProtocol = parse_url($otherURL);
$otherHost = $otherProtocol["host"] or null; // if $otherProtocol["host"] is set and is not null, use it. Else, use null.
$otherDomain = explode(".", $otherHost) or $otherDomain;
$otherSubdomain = array_shift($otherDomain); // subdom only
$otherDomain = implode(".", $otherDomain); // domain only
$otherFilepath = $otherProtocol["path"] or null;
$otherProtocol = $otherProtocol["scheme"] or null;
// END Parse other URL
// BEGIN Get current URL
#if($debug){echo '$_SERVER == '; var_dump($_SERVER);}
$thisProtocol = $_SERVER["HTTP_X_FORWARDED_PROTO"]; // http or https
$thisHost = $_SERVER["HTTP_HOST"]; // subdom or subdom.domain.tld
$thisDomain = explode(".", $thisHost);
$thisSubdomain = array_shift($thisDomain); // subdom only
$thisDomain = implode(".", $thisDomain); // domain only
if ($thisDomain == "")
$thisDomain = $otherDomain;
$thisFilepath = $_SERVER["PHP_SELF"]; // /path/to/file.php
$thisURL = "$thisProtocol://$thisHost$thisFilepath";
// END Get current URL
if($debug)echo"Current URL is $thisURL ($thisProtocol, $thisSubdomain, $thisDomain, $thisFilepath).\r\n";
if($debug)echo"Other URL is $otherURL ($otherProtocol, $otherHost, $otherFilepath).\r\n";
$thisDomainRegexed = isset($thisDomain) && $thisDomain != null && $thisDomain != "" ? "(\." . str_replace(".","\.",$thisDomain) . ")?" : ""; // prepare domain for insertion into regex
// v this makes the last slash before index.php optional
$regex = "/^(($thisProtocol:)?\/\/$thisSubdomain$thisDomainRegexed)?" . preg_replace('/index\\\..+$/i','?(index\..+)?', str_replace(array(".", "/"), array("\.", "\/"), $thisFilepath)) . '$/i';
if($debug)echo "\r\nregex is $regex\r\nComparing regex against $otherURL";
if (preg_match($regex, $otherURL))
{
if($debug)echo"\r\n\tIt's a match! Returning true...\r\n}\r\n-->";
return true;
}
else
{
if($debug)echo"\r\n\tOther URL is NOT a fully-qualified URL in this subdomain. Checking if it is relative...";
if($otherURL == $thisFilepath) // somewhat likely
{
if($debug)echo"\r\n\t\tOhter URL and this filepath are an exact match! Returning true...\r\n}\r\n-->";
return true;
}
else
{
if($debug)echo"\r\n\t\tFilepath is not an exact match. Testing against regex...";
$regex = regexFilepath($thisFilepath);
if($debug)echo"\r\n\t\tNew Regex is $regex";
if($debug)echo"\r\n\t\tComparing regex against $otherFilepath...";
if (preg_match($regex, $otherFilepath))
{
if($debug)echo"\r\n\t\t\tIt's a match! Returning true...\r\n}\r\n-->";
return true;
}
}
}
if($debug)echo"\r\nI tried my hardest, but couldn't match $otherURL to $thisURL. Returning false...\r\n}\r\n-->";
return false;
}
/**
* Uses the given filepath to create a regex that will match it in any of its relative representations.
*
* @param $path the filepath to be converted
*
* @return a regex that matches a all relative forms of the given filepath
*/
function regexFilepath($path)
{global $debug;
if($debug)echo"\r\nregexFilepath($path)\r\n{\r\n";
$filepathArray = explode("/", $path);
if (count($filepathArray) == 0)
throw new Exception("given parameter not a filepath: $path");
if ($filepathArray[0] == "") // this can happen if the path starts with a "/"
array_shift($filepathArray); // strip the first element off the array
$isIndex = preg_match("/^index\..+$/i", end($filepathArray));
$filename = array_pop($filepathArray);
if($debug){var_dump($filepathArray);}
$ret = '';
foreach($filepathArray as $i)
$ret = "(\.\.\/$ret$i\/)?"; // make a pseudo-recursive relative filepath
if($debug)echo "\r\n$ret";
$ret = preg_replace('/\)\?$/', '?)', $ret); // remove the last '?' and add one before the last '\/'
if($debug)echo "\r\n$ret";
$ret = '/^' . ($ret == '' ? '\.\/' : "((\.\/)|$ret)") . ($isIndex ? '(index\..+)?' : str_replace('.', '\.', $filename)) . '$/i'; // if this filepath leads to an index.php (etc.), then that filename is implied and irrelevant.
if($debug)echo'\r\n}\r\n';
}
global$debug$debug=false;//切换调试回显和变量转储
/**
*返回一个布尔值,指示给定URL是否为当前URL。
*
*@param$otherURL另一个URL,作为字符串。可以是任何URL,相对的或规范的。无效的URL将不匹配。
*
*@return true如果给定URL指向与当前URL相同的位置
*/
函数isCurrentURL($otherURL)
{全局$调试;
如果($debug)echo“”;
返回true;
}
其他的
{
if($debug)echo“\r\n\t另一个URL在此子域中不是完全限定的URL。正在检查它是否是相对的…”;
if($otherURL==$thisFilepath)//有点像
{
如果($debug)echo“\r\n\t\t URL和此文件路径完全匹配!返回true…\r\n}\r\n-->”;
返回true;
}
其他的
{
如果($debug)echo“\r\n\t\t文件路径不完全匹配。针对正则表达式进行测试…”;
$regex=regexFilepath($thisFilepath);
如果($debug)echo“\r\n\t\t新正则表达式是$Regex”;
if($debug)echo“\r\n\t\t将regex与$otherFilepath进行比较…”;
if(preg_match($regex,$otherFilepath))
{
如果($debug)echo“\r\n\t\t\t匹配!返回true…\r\n}\r\n-->”;
返回true;
}
}
}
如果($debug)echo“\r\n我尽了最大努力,但无法将$otherURL与$thisURL匹配。返回false…\r\n}\r\n-->”;
返回false;
}
/**
*使用给定的文件路径创建一个正则表达式,该正则表达式将在其任何相对表示中与之匹配。
*
*@param$path要转换的文件路径
*
*@返回与给定文件路径的所有相对形式匹配的正则表达式
*/
函数regexFilepath($path)
{全局$调试;
if($debug)echo“\r\nregexFilepath($path)\r\n{\r\n”;
$filepathArray=explode(“/”,$path);
如果(计数($filepathArray)==0)
抛出新异常(“给定参数不是文件路径:$path”);
if($filepathArray[0]==“”)//如果路径以“/”开头,则可能发生这种情况
array_shift($filepathArray);//从数组中删除第一个元素
$isIndex=preg_match(“/^index\…+$/i”,结束($filepathArray));
$filename=array\u pop($filepathArray);
if($debug){var_dump($filepathArray);}
$ret='';
foreach($filepathArray作为$i)
$ret=“(\.\.\/$ret$i\/)?”;//创建一个伪递归相对文件路径
如果($debug)回显“\r\n$ret”;
$ret=preg\u replace('/\)\?$/','?)',$ret);//删除最后一个'?'并在最后一个'\/'之前添加一个'?'
如果($debug)回显“\r\n$ret”;
$ret='/^'($ret=='''''.\.\/':“(\.\.\/)\.$ret)”)。($isIndex?'(索引\…+)):str_replace('.','\.',$filename))。$/i';//如果此文件路径指向index.php(等),则该文件名是隐含的且不相关的。
if($debug)echo'\r\n}\r\n';
}
这似乎匹配了我需要它匹配的所有内容,而不是我不需要它匹配的内容。首先,无法预测将导致显示当前页面的有效URL的总列表,因为您无法预测(或控制)可能链接回页面的外部链接。如果有人使用TinyURL或bit.ly怎么办?regex不会切芥末 如果您需要的是确保链接不会产生相同的页面,那么您需要对其进行测试。以下是一个基本概念:
function checkURL($me, $s) {
$dir = dirname($me) . '/';
// you may need to refine this
$s = preg_filter(array('~^//~', '~/$~', '~\?.*$~', '~\.\./~'),
array('', '', '', $dir), $s);
// parse resulting URL
$url = parse_url($s);
var_dump($url);
// match parsed URL's path with self
return ($url['path'] === $me);
}
// your page's URL with stripped out .php
$me = str_replace('.php', '', $_SERVER['PHP_SELF']);
// assume this is the URL you are matching against
$s = '../page/';
// compare $me with $s
$ret = checkURL($me, $s);
var_dump($ret);
global $debug;$debug = false; // toggle debug echoes and var_dumps
/**
* Returns a boolean indicating whether the given URL is the current one.
*
* @param $otherURL the other URL, as a string. Can be any URL, relative or canonical. Invalid URLs will not match.
*
* @return true iff the given URL points to the same place as the current one
*/
function isCurrentURL($otherURL)
{global $debug;
if($debug)echo"<!--\r\nisCurrentURL($otherURL)\r\n{\r\n";
if ($thisURL == $otherURL) // unlikely, but possible. Might as well check.
return true;
// BEGIN Parse other URL
$otherProtocol = parse_url($otherURL);
$otherHost = $otherProtocol["host"] or null; // if $otherProtocol["host"] is set and is not null, use it. Else, use null.
$otherDomain = explode(".", $otherHost) or $otherDomain;
$otherSubdomain = array_shift($otherDomain); // subdom only
$otherDomain = implode(".", $otherDomain); // domain only
$otherFilepath = $otherProtocol["path"] or null;
$otherProtocol = $otherProtocol["scheme"] or null;
// END Parse other URL
// BEGIN Get current URL
#if($debug){echo '$_SERVER == '; var_dump($_SERVER);}
$thisProtocol = $_SERVER["HTTP_X_FORWARDED_PROTO"]; // http or https
$thisHost = $_SERVER["HTTP_HOST"]; // subdom or subdom.domain.tld
$thisDomain = explode(".", $thisHost);
$thisSubdomain = array_shift($thisDomain); // subdom only
$thisDomain = implode(".", $thisDomain); // domain only
if ($thisDomain == "")
$thisDomain = $otherDomain;
$thisFilepath = $_SERVER["PHP_SELF"]; // /path/to/file.php
$thisURL = "$thisProtocol://$thisHost$thisFilepath";
// END Get current URL
if($debug)echo"Current URL is $thisURL ($thisProtocol, $thisSubdomain, $thisDomain, $thisFilepath).\r\n";
if($debug)echo"Other URL is $otherURL ($otherProtocol, $otherHost, $otherFilepath).\r\n";
$thisDomainRegexed = isset($thisDomain) && $thisDomain != null && $thisDomain != "" ? "(\." . str_replace(".","\.",$thisDomain) . ")?" : ""; // prepare domain for insertion into regex
// v this makes the last slash before index.php optional
$regex = "/^(($thisProtocol:)?\/\/$thisSubdomain$thisDomainRegexed)?" . preg_replace('/index\\\..+$/i','?(index\..+)?', str_replace(array(".", "/"), array("\.", "\/"), $thisFilepath)) . '$/i';
if($debug)echo "\r\nregex is $regex\r\nComparing regex against $otherURL";
if (preg_match($regex, $otherURL))
{
if($debug)echo"\r\n\tIt's a match! Returning true...\r\n}\r\n-->";
return true;
}
else
{
if($debug)echo"\r\n\tOther URL is NOT a fully-qualified URL in this subdomain. Checking if it is relative...";
if($otherURL == $thisFilepath) // somewhat likely
{
if($debug)echo"\r\n\t\tOhter URL and this filepath are an exact match! Returning true...\r\n}\r\n-->";
return true;
}
else
{
if($debug)echo"\r\n\t\tFilepath is not an exact match. Testing against regex...";
$regex = regexFilepath($thisFilepath);
if($debug)echo"\r\n\t\tNew Regex is $regex";
if($debug)echo"\r\n\t\tComparing regex against $otherFilepath...";
if (preg_match($regex, $otherFilepath))
{
if($debug)echo"\r\n\t\t\tIt's a match! Returning true...\r\n}\r\n-->";
return true;
}
}
}
if($debug)echo"\r\nI tried my hardest, but couldn't match $otherURL to $thisURL. Returning false...\r\n}\r\n-->";
return false;
}
/**
* Uses the given filepath to create a regex that will match it in any of its relative representations.
*
* @param $path the filepath to be converted
*
* @return a regex that matches a all relative forms of the given filepath
*/
function regexFilepath($path)
{global $debug;
if($debug)echo"\r\nregexFilepath($path)\r\n{\r\n";
$filepathArray = explode("/", $path);
if (count($filepathArray) == 0)
throw new Exception("given parameter not a filepath: $path");
if ($filepathArray[0] == "") // this can happen if the path starts with a "/"
array_shift($filepathArray); // strip the first element off the array
$isIndex = preg_match("/^index\..+$/i", end($filepathArray));
$filename = array_pop($filepathArray);
if($debug){var_dump($filepathArray);}
$ret = '';
foreach($filepathArray as $i)
$ret = "(\.\.\/$ret$i\/)?"; // make a pseudo-recursive relative filepath
if($debug)echo "\r\n$ret";
$ret = preg_replace('/\)\?$/', '?)', $ret); // remove the last '?' and add one before the last '\/'
if($debug)echo "\r\n$ret";
$ret = '/^' . ($ret == '' ? '\.\/' : "((\.\/)|$ret)") . ($isIndex ? '(index\..+)?' : str_replace('.', '\.', $filename)) . '$/i'; // if this filepath leads to an index.php (etc.), then that filename is implied and irrelevant.
if($debug)echo'\r\n}\r\n';
}