正则表达式不仅可以得到任何数字

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

Assuming your input is always ending with numbers, you can use slightly modified code:

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