How to make numbers not be shown in scientific form?

Question

I want to write an array of floating point numbers into files

Answer 1

You can use the number_format function to set a precision:

Example:

$mynum = 24.2837162893;
$mynum = number_format($mynum, 2);
echo($mynum);

// Outputs 24.28

So if you decide you want all your numbers to have 10 decimal places, you would just use $mynum = number_format($mynum, 10);.

Also, see the sprintf() function for other formatting options.

[EDIT]

In your particular example, here is where you would use this function:

As described in the other answer, float values are inherently imprecise. You have to decide what precision is important to you in your use case.

Ref: http://php.net/manual/en/function.number-format.php