我想从带有php的url检索没有扩展名的文件名

Question

I have an url which contains various POST-DATA in it And an image file at last. My link is : http://website-link.com/?page=gf_signature&signature=565dbca63791e5.87676354.png

I want to seperate the 565dbca63791e5.87676354.png from the url and seperate the extension (.png) from it.

I can do it :but it is from only plain URL:

$path = "/home/httpd/html/index.php";
$file = basename($path);         // $file is set to "index.php"
$file = basename($path, ".php"); // $file is set to "index"

Answer 1

First of all: use parse_url() as suggested in the comments. If you however opt for a regex solution, consider the following code:

$str = "http://website-link.com/?page=gf_signature&signature=565dbca63791e5.87676354.png";
$regex = "/signature=(?<signature>[^&]+)/";
// that is: match signature= literally, then match everything up to a new ampersand and save it to the group "signature"
preg_match($regex, $str, $matches);
$signature = $matches["signature"];
$ext = substr(strrchr($signature, '.'), 1);

print "Signature: $signature with extension: $ext";
// prints out: Signature: 565dbca63791e5.87676354.png with extension: png

See a working PHP fiddle here.