what dous this mean?

Shai-Hulud

hi guys, I wondered if anyone could help me with some simple things that I can not find in the manules

$submit = ( isset($HTTP_POST_VARS['post']) ) ? TRUE : 0;

the wuestion is simple here: what is done here exactly? when I read in the help file it does not give an example as such, can ayone help? 😕

laserlight

if the variable is set, then $submit is set to TRUE, otherwise $submit is set to 0

Read up on:
[man]isset/man
ternary operator

Shai-Hulud

thanks, i will read the reffered to docs 😃

this script:

<?php

$GET['downloaded'] = 0;
$GET['uploaded'] = 0;

$peer_up = pack("N", ($GET['downloaded']))/(8 1024 1024);
$peer_down = pack("N", ($GET['uploaded']))/(8 1024 1024);

// er('downloaded: ' . (int)(($GET['downloaded'])/(8 1024 1024)) . 'uploaded: ' . (int)(($GET['uploaded'])/(8 1024 1024)));
echo strlen($peer_up) . '|' . strlen($peer_down);

output: 1|1

I packed the ($_GET['downloaded']))/(8 1024 1024) as a signend long (32 bits) wich should mean that the lengh should be 4 right? but the output is 1|1 wich means it is only one, is there something I do wrong here?

tekky

$peer_up = pack("N", ($GET['downloaded'])) / (8 1024 1024);
$peer_down = pack("N", ($GET['uploaded'])) / (8 1024 1024);

are you intentionally closing the ()'s before doing the division and mulitiplication?

and what is the end result you are looking to achieve here?

Shai-Hulud

are the () bad? i just want to devide the $_GET['downloaded'] by (8 1024 1024)

I want to write the $peer_up and $peer_down to a file

wich should be in total 8 in strlengh

so I can read it:

$x = fread($handle, filesize($filename));
$downloaded = join('', unpack("N", substr($x, 0, 4)));
$uploaded = join('', unpack("N", substr($x, 4, 4)));

thanks for your time 🙂

tekky

well you are currently dividing the output of pack("N", $_GET[.....]) by 8 1024 1024....

try

$peer_up = pack("N", $_GET['downloaded'] / 8 1024 1024);

same for peer_down....

are you expecting to get an output like NNNNNN? (not familiar with the pack() function...

Shai-Hulud

no,

I'm trying to save the peer_up an peer_down to a file
in total it should be 64 bits long, becouse the N stands for unsigned long (always 32 bit, big endian byte order)
and there is 2 of them written in the file

it is not 32 bits, but only 8 becouse the output of strlen is 1 (wich stands for 8 bits.

get my idea?

tekky

then my above suggestion should work....

making it do the math before it packs it.... that way you arent performing the math on the packed value....

Shai-Hulud

oooooooow, now i cee 🙂, I must be pritty dumb to do such a thing
:eek:
thanks for the help 🙂

tekky

Originally posted by Shai-Hulud
oooooooow, now i cee 🙂, I must be pritty dumb to do such a thing
:eek:
thanks for the help 🙂

heh, getting into using a lot of (can prove to be very annoying (and hard to follow if you have no means of hiliting open/closed sets))

and your welcome, dont forget to mark as resolved if you got it fixed 😉