用PHP删除GET变量的好方法？
用PHP删除GET变量的好方法？
提问于 2009-08-09 15:30:17
我有一个包含GET变量的完整URL的字符串。删除GET变量的最佳方法是什么？有没有一种很好的方法来删除其中的一个？
这是一个可以工作的代码，但不是很漂亮(我认为)：
$current_url = explode('?', $current_url);
echo $current_url[0];上面的代码只是删除了所有的GET变量。在我的例子中，URL是从CMS生成的，所以我不需要任何关于服务器变量的信息。
回答 11
Stack Overflow用户
回答已采纳
发布于 2009-08-09 16:05:05
好的，要删除所有变量，也许最漂亮的是
$url = strtok($url, '?');请参阅关于strtok here。
它是最快的(见下文)，并且处理urls时不带'?‘恰如其分。
要获取url+querystring并只删除一个变量(不使用正则表达式替换，这在某些情况下可能会更快)，您可以执行如下操作：
function removeqsvar($url, $varname) {
list($urlpart, $qspart) = array_pad(explode('?', $url), 2, '');
parse_str($qspart, $qsvars);
unset($qsvars[$varname]);
$newqs = http_build_query($qsvars);
return $urlpart . '?' . $newqs;
}删除单个var的正则表达式替换可能如下所示：
function removeqsvar($url, $varname) {
return preg_replace('/([?&])'.$varname.'=[^&]+(&|$)/','$1',$url);
}下面是几种不同方法的计时，确保在两次运行之间重置计时。
<?php
$number_of_tests = 40000;
$mtime = microtime();
$mtime = explode(" ",$mtime);
$mtime = $mtime[1] + $mtime[0];
$starttime = $mtime;
for($i = 0; $i < $number_of_tests; $i++){
$str = "http://www.example.com?test=test";
preg_replace('/\\?.*/', '', $str);
}
$mtime = microtime();
$mtime = explode(" ",$mtime);
$mtime = $mtime[1] + $mtime[0];
$endtime = $mtime;
$totaltime = ($endtime - $starttime);
echo "regexp execution time: ".$totaltime." seconds; ";
$mtime = microtime();
$mtime = explode(" ",$mtime);
$mtime = $mtime[1] + $mtime[0];
$starttime = $mtime;
for($i = 0; $i < $number_of_tests; $i++){
$str = "http://www.example.com?test=test";
$str = explode('?', $str);
}
$mtime = microtime();
$mtime = explode(" ",$mtime);
$mtime = $mtime[1] + $mtime[0];
$endtime = $mtime;
$totaltime = ($endtime - $starttime);
echo "explode execution time: ".$totaltime." seconds; ";
$mtime = microtime();
$mtime = explode(" ",$mtime);
$mtime = $mtime[1] + $mtime[0];
$starttime = $mtime;
for($i = 0; $i < $number_of_tests; $i++){
$str = "http://www.example.com?test=test";
$qPos = strpos($str, "?");
$url_without_query_string = substr($str, 0, $qPos);
}
$mtime = microtime();
$mtime = explode(" ",$mtime);
$mtime = $mtime[1] + $mtime[0];
$endtime = $mtime;
$totaltime = ($endtime - $starttime);
echo "strpos execution time: ".$totaltime." seconds; ";
$mtime = microtime();
$mtime = explode(" ",$mtime);
$mtime = $mtime[1] + $mtime[0];
$starttime = $mtime;
for($i = 0; $i < $number_of_tests; $i++){
$str = "http://www.example.com?test=test";
$url_without_query_string = strtok($str, '?');
}
$mtime = microtime();
$mtime = explode(" ",$mtime);
$mtime = $mtime[1] + $mtime[0];
$endtime = $mtime;
$totaltime = ($endtime - $starttime);
echo "tok execution time: ".$totaltime." seconds; ";显示
regexp execution time: 0.14604902267456 seconds; explode execution time: 0.068033933639526 seconds; strpos execution time: 0.064775943756104 seconds; tok execution time: 0.045819044113159 seconds;
regexp execution time: 0.1408839225769 seconds; explode execution time: 0.06751012802124 seconds; strpos execution time: 0.064877986907959 seconds; tok execution time: 0.047760963439941 seconds;
regexp execution time: 0.14162802696228 seconds; explode execution time: 0.065848112106323 seconds; strpos execution time: 0.064821004867554 seconds; tok execution time: 0.041788101196289 seconds;
regexp execution time: 0.14043688774109 seconds; explode execution time: 0.066350221633911 seconds; strpos execution time: 0.066242933273315 seconds; tok execution time: 0.041517972946167 seconds;
regexp execution time: 0.14228296279907 seconds; explode execution time: 0.06665301322937 seconds; strpos execution time: 0.063700199127197 seconds; tok execution time: 0.041836977005005 seconds; strtok胜出，是目前为止最小的代码。
Stack Overflow用户
发布于 2009-08-09 15:37:26
这样如何：
preg_replace('/\\?.*/', '', $str)Stack Overflow用户
发布于 2009-08-09 15:40:56
如果您尝试从中删除查询字符串的URL是PHP脚本的当前URL，则可以使用前面提到的方法之一。如果您只有一个包含URL的字符串变量，并且您想要去掉'?‘之后的所有内容您可以执行以下操作：
$pos = strpos($url, "?");
$url = substr($url, 0, $pos);页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/1251582
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