color.php
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color.php
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	<?php
	/**
	* Represents a color
	*/
	class Color {
	/**
	* The hexadecimal RGB representation of the color
	*/
	private $hex;

	/**
	* Initializes a new instance of a Color object.
	*
	* @param string $color The color name or code.
	*/
	public function __construct ($color = null) {
	if ($color === null) return;
	if (!$color) {
	$this->hex = "000";
	} elseif (is_array($color)) {
	if (array_key_exists('r', $color) && array_key_exists('g', $color) && array_key_exists('b', $color)) {
	//RGB
	$this->hex = self::rgb2hex($color['r'], $color['g'], $color['b']);
	} else {
	throw new Exception("Unrecognized array format.");
	}
	} elseif (preg_match("/[0-9A-F]{6}/", $color) \|\| preg_match("/[0-9A-F]{3}/", $color)) {
	$this->hex = $color;
	} elseif (preg_match("/#[0-9A-F]{6}/", $color) \|\| preg_match("/#[0-9A-F]{3}/", $color)) {
	$this->hex = substr($color, 1);
	} else {
	throw new Exception("Unrecognized string format.");
	}
	}

	public function __toString () {
	return "#" . $this->hex;
	}

	public static function rgb2hex ($r, $g, $b) {
	return strtoupper (
	str_pad(dechex($r), 2, '0', STR_PAD_LEFT) .
	str_pad(dechex($g), 2, '0', STR_PAD_LEFT) .
	str_pad(dechex($b), 2, '0', STR_PAD_LEFT)
	);
	}

	public static function Random () {
	$rgb = [
	'r' => mt_rand(0, 255),
	'g' => mt_rand(0, 255),
	'b' => mt_rand(0, 255)
	];
	return new Color($rgb);
	}
	}