删除字符串开头的一个或多个点

Question

How can I remove the dot that starts a string?

$string = ". Hello world .";

I only want to remove the first dot, not the dot at the end.

Answer 1

ltrim('. Hello World! .','.');

Answer 2

Simple pattern would match any period (or sequence, since you suggested this) at the start of a string, or (following a request from the OP in the comments below) at the end of the string:

preg_replace( "/^\.+|\.+$/", "", "....Hello...." );

Demo: http://codepad.org/Nst5EX1k

Answer 3

Using $stripped = trim($string, ' .'); is probably better and strips any space or dot.

Answer 4

It seems to me that you're using PHP. Try:

$string = ". Hello World! .";
$pos = strrpos($string, ".");
$stripped = substr($string, $pos + 1);