class gifpix {
var $start = '47494638396101000100800000';
var $color = 'ffffff';
var $black = '000000';
var $marker = '21f904';
var $transparent = '01';
var $end = '000000002c00000000010001000002024401003b';
function hex2bin($s) {
for ($i = 0; $i < strlen($s); $i += 2) {
$bin .= chr(hexdec(substr($s,$i,2)));
}
return $bin;
}
function create($color = -1) {
if (($color!= -1) && (strlen($color)==6)) {
$this->transparent = '00';
if ($color == '000000')
$this->black = 'ffffff';
$this->color = $color;
}
$hex = $this->start.$this->color.$this->black.$this->marker.$this->transparent.$this->end;
return $this->hex2bin($hex);
}
}
header("Content-Type: image/gif");
$gifpix = new gifpix();
// color:
print $gifpix->create('0000ff');
// transparent:
//print $gifpix->create();
?>