{

private static $colors = array(

'black' => 0x000000,

'silver' => 0xc0c0c0,

'gray' => 0x808080,

'teal' => 0x008080,

'aqua' => 0x00ffff,

'blue' => 0x0000ff,

'navy' => 0x000080,

'green' => 0x008000,

'lime' => 0x00ff00,

'white' => 0xffffff,

'fuschia' => 0xff00ff,

'purple' => 0x800080,

'olive' => 0x808000,

'yellow' => 0xffff00,

'orange' => 0xffA500,

'red' => 0xff0000,

'maroon' => 0x800000,

'transparent' => 0x7fffffff

);

public static function gdAllocate($image, $color)

{

$colorRGBA = self::parse($color);

$b = ($colorRGBA)&0xff;

$colorRGBA >>= 8;

$g = ($colorRGBA)&0xff;

$colorRGBA >>= 8;

$r = ($colorRGBA)&0xff;

$colorRGBA >>= 8;

$a = ($colorRGBA)&0xff;

$c = imagecolorallocatealpha($image, $r, $g, $b, $a);

if ($color == 'transparent') {

imagecolortransparent($image, $c);

}

return $c;

}

public static function parse($color)

{

// Direct color representation (ex: 0xff0000)

if (!is_string($color) && is_numeric($color))

return $color;

// Color name (ex: "red")

if (isset(self::$colors[$color]))

return self::$colors[$color];

if (is_string($color)) {

$color_string = str_replace(' ', '', $color);

// Color string (ex: "ff0000", "#ff0000" or "0xfff")

if (preg_match('/^(#|0x|)([0-9a-f]{3,6})/i', $color_string, $matches)) {

$col = $matches[2];

if (strlen($col) == 6)

return hexdec($col);

if (strlen($col) == 3) {

$r = '';

for ($i=0; $i<3; $i++)

$r.= $col[$i].$col[$i];

return hexdec($r);

}

}

// Colors like "rgb(255, 0, 0)"

if (preg_match('/^rgb\(([0-9]+),([0-9]+),([0-9]+)\)/i', $color_string, $matches)) {

$r = $matches[1];

$g = $matches[2];

$b = $matches[3];

if ($r>=0 && $r<=0xff && $g>=0 && $g<=0xff && $b>=0 && $b<=0xff) {

return ($r << 16) | ($g << 8) | ($b);

}

}

}

throw new \InvalidArgumentException('Invalid color: '.$color);

}