How can I convert from bytes to float in php? Like in Java
int i = (byte3 & 0xff) << 24 | (byte2 & 0xff) << 16 | (byte1 & 0xff) << 8 | byte0 & 0xff;
Float.intBitsToFloat(i);
views:
276answers:
3
A:
I don't think php has bytes, does it? When you assign a number to a variable you'll get an variable with a number type
$a = 10; // integer
$f = 1.0; // double
$b = $a + $f; // $b is double
Mene
2010-04-12 19:46:11
yes php not have bytes system. but i have to make from bytes to float.it's bytes: 1059760811 > 0.6666667 (float)
Valdas
2010-04-12 19:51:18
out of interest, which programming language does have the *byte* variable type?
MatW
2010-04-12 19:52:08
I have remade one script form java to php. it will be last task.In java it easy: Float.intBitsToFloat(integer);
Valdas
2010-04-12 19:57:59
@MatW: Strangely enough, Java and C# have a byte variable type... but it's just a 1 byte unsigned number type (values 0-255).
R. Bemrose
2010-04-12 19:59:12
Valdas, that's an integet to a float. I don't get how you get 2/3rd from that integer though..
Arda Xi
2010-04-12 20:00:25
Incidentally, Float.intBitsToFloat is described here: http://java.sun.com/javase/6/docs/api/java/lang/Float.html#intBitsToFloat%28int%29
R. Bemrose
2010-04-12 20:00:27
I dont know in JAVA i checked. In php manual: For instance, 1/3 in decimal form becomes 0.3.
Valdas
2010-04-12 20:02:41
@OMG Unicorns Thx +1. If I could give you extra for the username, I would!
MatW
2010-04-12 20:03:28
@MatW: Ha, I changed it for April Fools Day, but can't change it back until May 1st. :D
R. Bemrose
2010-04-12 20:17:36
Ah, now I understand what you are trying to do ^^
Mene
2010-04-13 11:10:23
+2
A:
There may be a more direct way, but here you go:
<?php
var_dump(unpack('f', pack('i', 1059760811)));
?>
This is, of course, machine dependent, but I don't know of any machine running PHP that doesn't use IEEE 754 floats.
konforce
2010-04-12 20:14:46