PHP how to convert number exponential number to string?

Question

I have a number stored in scientific notation

2.01421700079E+14

I've tried using float, string, int and I can't get

0201421700079085 from 2.01421700079E+14

1. echo (float)$awb;
2. echo number_format($awb, 0, '', '');
3. echo (int)$awb;
4. echo (string)$awb;

1. 2.01421700079E+14 = float
2. 201421700079085 = number
3. 201421700079085 = int
4. 2.01421700079E+14 = string

Answer 1

printf and friends will do this:

<?php
$awb = 2.01421700079E+14;
$str = sprintf("%d", $awb);
var_dump($str);

Output:

string(15) "201421700079000"

There obviously isn't enough information in your original number to get any more precision than that.

Answer 2

试试这个：

number_format(1.2378147769392E+14,0,'','')