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session_start();
header(“Content-type: image/png”);
//创建真彩色白纸
$im = @imagecreatetruecolor(50, 20) or die(“建立图像失败”);
//获取背景颜色
$background_color = imagecolorallocate($im, 255, 255, 255);
//填充背景颜色(这个东西类似油桶)
imagefill($im,0,0,$background_color);
//获取边框颜色
$border_color = imagecolorallocate($im,200,200,200);
//画矩形，边框颜色200,200,200
imagerectangle($im,0,0,49,19,$border_color);
//逐行炫耀背景，全屏用1或0
for($i=2;$i
//获取随机淡色
$line_color = imagecolorallocate($im,rand(200,255),rand(200,255),rand(200,255));
//画线
imageline($im,2,$i,47,$i,$line_color);
}
//设置字体大小
$font_size=12;
//设置印上去的文字
$Str[0] = “ABCDEFGHIJKLMNOPQRSTUVWXYZ”;
$Str[1] = “abcdefghijklmnopqrstuvwxyz”;
$Str[2] = “01234567891234567890123456″;
//获取第1个随机文字
$imstr[0]["s"] = $Str[rand(0,2)][rand(0,25)];
$imstr[0]["x"] = rand(2,5);
$imstr[0]["y"] = rand(1,4);
//获取第2个随机文字
$imstr[1]["s"] = $Str[rand(0,2)][rand(0,25)];
$imstr[1]["x"] = $imstr[0]["x"]+$font_size-1+rand(0,1);
$imstr[1]["y"] = rand(1,3);
//获取第3个随机文字
$imstr[2]["s"] = $Str[rand(0,2)][rand(0,25)];
$imstr[2]["x"] = $imstr[1]["x"]+$font_size-1+rand(0,1);
$imstr[2]["y"] = rand(1,4);
//获取第4个随机文字
$imstr[3]["s"] = $Str[rand(0,2)][rand(0,25)];
$imstr[3]["x"] = $imstr[2]["x"]+$font_size-1+rand(0,1);
$imstr[3]["y"] = rand(1,3);
//将显示的数组赋值给session
$_SESSION['CODE'] = $imstr[0]["s"].$imstr[1]["s"].$imstr[2]["s"].$imstr[3]["s"];
//写入随机字串
for($i=0;$i
$text_color = imagecolorallocate($im,rand(50,180),rand(50,180),rand(50,180));
imagechar($im,$font_size,$imstr[$i]["x"],$imstr[$i]["y"],$imstr[$i]["s"],$text_color);
}
//显示图片
imagepng($im);
//销毁图片
imagedestroy($im);
?>
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