for($i = 1;$i < 200;$i++){
$x = mt_rand(1,$w-9);
$y = mt_rand(1,$h-9);
$color = imagecolorallocate($im,mt_rand(200,255),mt_rand(200,255),mt_rand(200,255));
imagechar($im,1,$x,$y,"*",$color);
}
for($i = 1;$i < 200;$i++){
$x = mt_rand(1,$w-9);
$y = mt_rand(1,$h-9);
这三句话是什么意思?================================================================================imagefilledrectangle($im,0,0,$w,$h,$white);
imagerectangle($im,0,0,$w-1,$h-1,$black); //为什么这个矩形的(X2,Y2)坐标是($w-1,$h-1 ) ??而又是从(0,0)开始的?================================================================================ $y1=rand(0,26);
$y2=rand(0,26);
$y3=rand(0,26);
$y4=rand(0,26);
imageline($im,0,$y1,$w,$y3,img_color_styled);
imageline($im,0,$y2,$w,$y4,img_color_styled);
img_color_styled 是什么意思?
2,如果是$w,$h的话 ,右边框和下边款看不见
$pink = imagecolorallocate($canvas, 255, 105, 180);
imagerectangle($canvas, 50, 50, 150, 150, $pink);
header('Content-Type: image/jpeg');
imagejpeg($canvas);
imagedestroy($canvas);