My regex doesn’t work as expected when I run my code, but when I test it on a website the regex does exactly as expected. See my function:

function checkDecimais($numero){

            if($numero > 0){
                preg_match('/^([0]+).([0]*)([1-9])/', $numero, $matches);

                if(isset($matches[2])){
                    return strlen($matches[2]);
                }else{
                    return 0;  
                }

            }else{
                return 0;
            }
}

If I call it like this: checkDecimais(0.0009) it works and returns the number 3, as it has 3 decimal zero digits. However, if I call it like this: checkDecimais(0.00009) , it stops working and returns 0, because my regex is only taking up to 3 zero digits and ignoring when there are more than three digits?

If I change it to string checkDecimais('0.0009') , it works, however I’m giving it numbers and I can’t understand why it doesn’t work.

Can anybody help me ?

I’ve already tried using other regex, but they all have the same problem, it only takes the first 3 zeros when the data is of type number.