如何验证路径是否以字符串开头

Question

I tried pretty much all the methods to test if path like this file:///c:/folder/texts/int.txt or file:///d:/folder/texts/int.txt starts with d:/ or a:/ or c:/ somothings with string :/ some one have an idea please I try to use for this

if(strpos($URL, "c:/")) $URL = $URL;
else $URL = "http://$URL";

but it test just if the url starts with c:/ and i would like that test if it beginning with somothing like "{a,b,c,.............,z}:/".

Answer 1

How about using preg_match with PHP?

if (preg_match("#[a-z]:/#", $URL))

This, however, assumes that the drive can be anywhere in the string, and therefore that the path in it is a valid one. If you want it to specifically start with file///drive:/, then use this instead:

if (preg_match("#^file///[a-z]:/#", $URL))