Question

Conclusion: Marc B’s solution is a 64 Bit, but for 32 Bit I’m not sure you can get the accuracy needed

UPDATE #1: 19 character length is the string/number max length

UPDATE #2: This kinda works but only if the number is in string format like this:

$number = "12345678901234567890";

if I pass it like this

$number = 12345678901234567890;

I get an warning:

Warning: gmp_abs(): Unable to convert variable to GMP – wrong type

Updated Class

class StringToInteger {
    public static function getInteger($number) {
        //return sprintf('%.0f', $number);
    //$number = sprintf('%d', $number);
    $number = gmp_abs($number);
    return gmp_strval($number);
    }
}

ORIGINAL QUESTION BELOW:

I have some data being passed either as a string or integer (Think Phone Number but longer), most of the data is just a long number like this:

1234567890123456789

But sometimes it comes like this

123-456-789-012-345-678-9 // could be other non numeric characters as well

Using the below functions doesn’t give the desired results

class StringToInteger {
    public static function getInteger($number) {
        return number_format($number, 0, '.', '');
    }
}

class NumericOnly {
    public static function formatNumber($number) {
        return preg_replace("/[^\d]/", "", $number); 
    }
}

Pass as numeric:

$number = 1234567890123456789;
// output: 1.23456789012E+18 can't use this
echo "Number: {$number}\n"; 

// Where did my number go? truncated/rounded?
// output: 12345678901218 can't use this
echo "Numeric Only: ".NumericOnly::formatNumber($number)."\n"; 

// Where did my number go? truncated?
// output: 1234567890123456768 can't use this
echo "String To Integer: ".StringToInteger::getInteger($number)."\n"; 

Pass as string:

$string = '1234567890123456789';
// output: 1234567890123456789
echo "String Number: {$string}\n"; 

// Works
// output: 1234567890123456789
echo "String Numeric Only: ".NumericOnly::formatNumber($string)."\n"; 

// Where did my number go? truncated?
// output: 1234567890123456768 can't use this
echo "String To Integer: ".StringToInteger::getInteger($string)."\n"; 

// After Conversion, truncated?
// output: 1234567890123456768 can't use this
echo "After String To Integer: ";
echo StringToInteger::getInteger(NumericOnly::formatNumber($string))."\n"; 

Alpha Numeric

$string = '123-456-789-012-345-678-9';
// output: 123-456-789-012-345-678-9 can't use this
echo "String Number: {$string}\n"; 

// Works
// output: 1234567890123456789
echo "String Numeric Only: ".NumericOnly::formatNumber($string)."\n"; 


// After Conversion, truncated?
// output: 1234567890123456768 can't use this
echo "After String To Integer: ";
echo StringToInteger::getInteger(NumericOnly::formatNumber($string))."\n"; 

Any ideas on how to get a Long Integer (The full correct number)?

Answer 1

The largest integer that can be represented in a 64bit PHP install, compared to your number:

   9,223,372,036,854,775,808 - largest possible signed 64bit integer
  12,345,678,901,234,567,890 - your number

since you’re exceeding the maximum number size, you can’t expect to get useful results without using something like bcmath/GMP.