一個簡單的驗證碼

標籤：des   color   java   for   c   on   r   ad   ef   

//設定畫布寬度$image = imagecreatetruecolor(100, 50);//畫布顏色$bgcolor = imagecolorallocate($image, 255, 255, 255);// imagefill — 地區填充imagefill($image, 0, 0, $bgcolor);//四個隨機驗證碼// for($i=0;$i<4;$i++){//  $fontsize = 6;//字型大小//  $fontcolor = imagecolorallocate($image, rand(0,120), rand(0,120), rand(0,120)); //字型顏色//  $fontcontent = rand(0,9);//隨機數字//  //定位//  $x = ($i * 100 / 4)+ rand(5,10); ////  $y = rand(5,10);//  imagestring($image, $fontsize, $x, $y, $fontcontent, $fontcolor);// }//包含英文字母的驗證碼for($i=0;$i<4;$i++){    $fontsize = 6;    $data =‘123456789abcdefghijklmnopqrstuvwxy‘ ;//建立字典    $fontcolor = imagecolorallocate($image, rand(0,120), rand(0,120), rand(0,120));    $fontcontent = substr($data, rand(0,strlen($data)),1);    $x = ($i * 100 / 4)+ rand(5,10);     $y = rand(5,10);    imagestring($image, $fontsize, $x, $y, $fontcontent, $fontcolor);}//增加幹擾點for($i=0;$i<200;$i++){    $pointcolor = imagecolorallocate($image, rand(50,120), rand(50,120), rand(50,120));    imagesetpixel($image, rand(0,99), rand(0,29), $pointcolor);}//增加幹擾線for ($i=0; $i < 4; $i++) {     $linecolor = imagecolorallocate($image, rand(80,220), rand(80,180), rand(90,250)); //線的顏色是隨機的    imageline($image, rand(0,99), rand(0,29), rand(0,99), rand(0,29), $linecolor);}header("content-type:image/png");//輸出映像imagepng($image);//銷毀映像imagedestroy($image);

一個簡單的驗證碼