如何使用preg_match - ，+ ,. 值？

Question

I use this preg_match condition for matching positive, negative and decimal values

/^[0-9,-\.]{1,50}$/

But when I enter --34.000 it does not show error, when I enter 34...9868 it does not show error, what I want is that it must accept only positive, negative and decimal values.

Answer 1

try this regex ^-?\d*\.?\d+$ i suppose it however cannot be limited to 50 chars