Format a number keeping its sign in php

Question

Is there a way to format in PHP a number that always retains its sign (+ or -)?

In .NET, it will be something like:

string myString = number.ToString("+#;#");

Answer 1

Use sprintf :

$myString = sprintf("%+f", number);

Answer 2

   $myString = sprintf("%+d", 25);

Answer 3

printf("%+d", $number)