Converting #000000 to 0,0,0

[VooDooRT]

As the subject says, I need a way to convert #000000 to the RGB version.

ideas?

[MeX]

hi VooDooRT!!

try this:

function hexTOrgb($hex) {
  $rgb = str_replace('#', '', $hex);
  if (strlen($rgb) == 6) {
    $r = hexdec($rgb{0} . $rgb{1});
    $g = hexdec($rgb{2} . $rgb{3});
    $b = hexdec($rgb{4} . $rgb{5});
    return $r.$g.$b;
  } else {
    return '000000';
  }
}

echo hexTOrgb('#0A141E');

hope that helps!!

ceeyaa.MeX

[VooDooRT]

All I keep getitng with that is 000000 when I want to covert #000000 to 0,0,0 or #f5f5f5 to the 00,00,00 equivalent.

[Weedpacket]

function hextorgb($hex)
{ // Takes a string '#hhhhhh' and converts
  // it into an array of three nonnegative ints
  // (red, green, blue). The '#' is optional, and
  // only the first six characters will be used.
  // Behaviour if those six characters are not hex
  // digits is undefined.

  $hex = substr(str_replace('#','',$hex), 0, 6);
  $rgb = hexdec($hex);
  $blue = $rgb&0xff;
  $green = ($rgb>>8)&0xff;
  $red = ($rgb>>16)&0xff;
  return array($red, $green $blue);
}

What you do with the contents of the returned array is up to you.

[VooDooRT]

Will this take something like f5f5f5 and turn it into the appropriate numbers? Like 255,255,255?

If so, HOW? LoL...

[Weedpacket]

Originally posted by VooDooRT
Will this take something like f5f5f5 and turn it into the appropriate numbers? Like 255,255,255?

You could try it, of course...

If so, HOW? LoL...

First, it knocks off the # if it's there, then converts the first six characters of what's left into an integer.

The rest is maths to extract relevant bytes from the number. I continued to use base-16 and bit operations instead of base-10 and arithmetic ones. I could have written the meaty part as:

$blue = $rgb%256;
$green = ($rgb/256)%256;
$red = ($rgb/(256*256))%256;

But it would probably be slower, and definitely less apropos.

[VooDooRT]

Ok, I'm crappy with arrays (just never use them until now). How do I return it?

[Weedpacket]

Originally posted by VooDooRT
Ok, I'm crappy with arrays (just never use them until now). How do I return it?

You're either new to programming, or very perverse ... 🙂

Here's the easiest way in PHP:

list($red,$green,$blue) = hextorgb('#beefed');

[VooDooRT]

lol, I am somewhat new, only been writing scripts for about 6 months, however, what I write never really needs arrays except SQL querys, and for the most part, those are easy arrays.

lol, yeah, perhaps perverse also...who knows...

[MeX]

Originally posted by VooDooRT
All I keep getitng with that is 000000 when I want to covert #000000 to 0,0,0 or #f5f5f5 to the 00,00,00 equivalent.

i'm not sure what you are doing wrong but if you call my function with:

$rgb_value = hexTOrgb('f5f5f5');

you have in $rgb_value => 245245245

if you want to have them seperated with any character, use this function:

<?php
// function converts hex to rgb values
// argument $hex may be #xxxxxx OR xxxxxx BUT must be 6 length
// argument $sep may be any character ( e.g. , OR ; )
function hexTOrgb($hex, $sep = '') {
	$rgb = str_replace('#', '', $hex);
	if (strlen($rgb) == 6) {
		$r = hexdec($rgb{0} . $rgb{1});
		$g = hexdec($rgb{2} . $rgb{3});
		$b = hexdec($rgb{4} . $rgb{5});
		return $r . $sep . $g . $sep . $b;
  } else {
    return '00' . $sep . '00' . $sep . '00';
  }
}

$rgb_value = hexTOrgb('#0A141E');
echo "<pre>'#0A141E'      ==> $rgb_value</pre>";
$rgb_value = hexTOrgb('#F5F5F5', ',');
echo "<pre>'#F5F5F5', ',' ==> $rgb_value</pre>";
?>

ceeyaa.MeX