Beware of the quotes in the examples provided as mentioned by Paul R, many of the examples i tested above required further modification, due to this website’s output.

1) Many of the code examples above gave syntax errors when I copied and pasted the code. The syntax errors are caused by this webpage printing a single quotation mark as some other type of symbol that looks similar to a quote mark but is actually not. To solve this, just replace those fake single quote marks with the real thing from your keyboard.

2) None of the code samples that I tried above worked on the first query parameter in the query string. Even the code samples that say they have this fixed still doesn’t work. (I was getting my Query string from the Server variable. Those who use a full URL might have different results). I believe this is the case because all these code samples look for a ‘&’ symbol to separate query terms. Obviously the first query term will never start with a & symbol.

But,
It’s not working for removing last param from url or string, can anyone help for this !!!!

Also, this function allows the removal of multiple vars.


echo htmlentities(getRedirectURL("http://www.example.com/?a[]=1&a[0]=3&a[5][7][89][fdds][ddd]=44","a"));
echo htmlentities(getRedirectURL("http://www.example.com/?a=1&a=2&b=3&c=4",array("a","c")));
function getRedirectURL($url,$keysToRemove) {
if (!is_array($keysToRemove))
$keysToRemove = array($keysToRemove);

foreach ($keysToRemove as $key)
$url = preg_replace('/(?:&|(\\?|\\G))' . urlencode($key) . '(?:\\[[^]]*\\])*=[^&]*(?(1)&|)?/i', "$1", $url);

if (substr($url,-1) == '?')
$url = substr($url,0,-1);

return $url;
}


I always like a regular expression but an alternative would be to use the ? as a delimiter and explode the uri into an array and retrieve the first result i.e

echo reset(explode(‘?’,$_SERVER['REQUEST_URI']));

I found it easier to just directly define the $_SERVER['QUERY_STRING'] by concatenating the $_GET[] variables I wanted to pass, and leaving out the ones I didn’t (the checkbox array)

I found it easier to just directly define the $_SERVER['QUERY_STRING'] by concatenating the $_GET[] variables I wanted to pass, and leaving out the ones I didn’t (the checkbox array)