如果你想分析当前的查询字符串请求：

  array_search（$ var1，$ _ GET）！== false OR array_search（$ var2，$ _ GET）！== false ... 
 

其他：

  $ vars = array（）; 
 parse_string（$ queryString，$ vars）; 
 if（array_search（$ var1，$ vars）！== false或array_search（$ var2，$ vars）！== false ... 
 

。

I need a bit of simple PHP code that can return a specified variable if any one of three variables is contained within a query string. Probably easier to explain like this:

if {querystring} contains {var1} or {var2} or {var3} return {var1}

This is expands on the following question: Creating a canonical with PHP

I need to add said code to one of the variables specified in function params, in the linked question.

If you want to analyse the query string of the current request:

array_search($var1,$_GET)!==false OR array_search($var2,$_GET)!==false ....

else:

$vars = array();
parse_string($queryString,$vars);
if(array_search($var1,$vars)!==false OR array_search($var2,$vars)!==false ...

.