Convert a string containing a number in scientific notation to a double in PHP

Question

I need help converting a string that contains a number in scientific notation to a double.

Example strings: \"1.8281e-009\" \"2.3562e-007\" \"0.911348\"

I wa

Answer 1

Use number_format() and rtrim() functions together. Eg

//eg $sciNotation = 2.3649E-8
$number = number_format($sciNotation, 10); //Use $dec_point large enough
echo rtrim($number, '0'); //Remove trailing zeros

I created a function, with more functions (pun not intended)

function decimalNotation($num){
    $parts = explode('E', $num);
    if(count($parts) != 2){
        return $num;
    }
    $exp = abs(end($parts)) + 3;
    $decimal = number_format($num, $exp);
    $decimal = rtrim($decimal, '0');
    return rtrim($decimal, '.');
}