Converting float to string without exponential notation

Question

I'm looking for a way to convert a float value to string in PHP without exponential (scientific) notation. I need it in order to use bcmath, which doesn't support exponential notation.

<?php

$float  = 0.000003;
$string = (string) $float;

var_dump($string); 
// Actual result: "3.0E-6"
// Expected result: "0.000003"

var_dump(bcadd($string, $string, 6)); 
// Actual result: 0.000000 
// Expected result: "0.000006"

Answer 1

Use sprintf

$float  = 0.000003;
$string = sprintf("%.6f", $float);

var_dump($string);

Answer 2

Try this function:

   function f2s(float $f) {
        $s = (string)$f;
        if (!strpos($s,"E")) return $s;
        list($be,$ae)= explode("E",$s);
        $fs = "%.".(string)(strlen(explode(".",$be)[1])+(abs($ae)-1))."f";
        return sprintf($fs,$f); 
    }