Regular expression to get any numbers not only integers

Question

I have this string and need to get the number (integer or double) out of it.

String 1 GMT +2

String 2 - GMT +2.5

I have used this to get the integer out of String 1 and need to know how to write a generic one to get 2 or 2.5

below is what i have written.

return preg_replace('/\D/', '', $str); 

but it doesnt return 2.5 but takes it as 25 instead of 2.5

Answer 1

假设您的输入始终以数字结尾，则可以使用稍微修改的代码：

preg_replace('/^\D*/', '', $str);