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PUM_Utils_CSS::hex2rgb( string $hex = '#ffffff', string $return_type = 'rgb' )

	public static function hex2rgb( $hex = '#ffffff', $return_type = 'rgb' ) {
		if ( is_array( $hex ) ) {
			$hex = implode( '', $hex );
		}
		$hex = str_replace( "#", "", $hex );

		if ( strlen( $hex ) == 3 ) {
			$r = hexdec( substr( $hex, 0, 1 ) . substr( $hex, 0, 1 ) );
			$g = hexdec( substr( $hex, 1, 1 ) . substr( $hex, 1, 1 ) );
			$b = hexdec( substr( $hex, 2, 1 ) . substr( $hex, 2, 1 ) );
		} else {
			$r = hexdec( substr( $hex, 0, 2 ) );
			$g = hexdec( substr( $hex, 2, 2 ) );
			$b = hexdec( substr( $hex, 4, 2 ) );
		}

		$rgb = array( $r, $g, $b );

		if ( $return_type === 'array' ) {
			return $rgb; // returns an array with the rgb values
		}

		return 'rgb(' . implode( ",", $rgb ) . ')'; // returns the rgb values separated by commas
	}