imagefilledrectangle($img,541,$h17,555,189,$color);
imagestring($img,1,541,$h17-10,$hour[17],$color);
imagestring($img,1,544,195,17,$bc);
//18点
$color = imagecolorallocate($img, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
imagefilledrectangle($img,571,$h18,585,189,$color);
imagestring($img,1,571,$h18-10,$hour[18],$color);
imagestring($img,1,571,195,18,$bc);
//19点
$color = imagecolorallocate($img, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
imagefilledrectangle($img,601,$h19,615,189,$color);
imagestring($img,1,601,$h19-10,$hour[19],$color);
imagestring($img,1,604,195,19,$bc);
//20点
$color = imagecolorallocate($img, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
imagefilledrectangle($img,631,$h20,645,189,$color);
imagestring($img,1,631,$h20-10,$hour[20],$color);
imagestring($img,1,634,195,20,$bc);
//21点
$color = imagecolorallocate($img, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
imagefilledrectangle($img,661,$h21,675,189,$color);
imagestring($img,1,661,$h21-10,$hour[21],$color);
imagestring($img,1,664,195,21,$bc);
//22点
