<?php    header(‘Content-type:image/jpeg‘);    $width=120;    $height=40;    $element=array(‘a‘,‘b‘,‘c‘,‘d‘,‘f‘,‘g‘,‘h‘,‘i‘,‘j‘,‘k‘,‘l‘,‘m‘,‘n‘);        $img=  imagecreatetruecolor($width, $height);    $colorBg=imagecolorallocate($img, rand(200,255),rand(200,255),rand(200,255));    $colorBorder= imagecolorallocate($img, rand(200,255), rand(200,255), rand(200,255));    $colorPixel=  imagecolorallocate($img, rand(100,200), rand(100,200), rand(100,200));   $colorstring=  imagecolorallocate($img, rand(10,100), rand(10,100), rand(10,100));    imagefill($img, 0, 0, $colorBg);    imagerectangle($img, 0, 0, $width-1, $height-1, $colorBorder);     for($i=0;$i<100;$i++){            imagesetpixel($img, rand(0,$width-1), rand(0, $height-1), $colorPixel);    }    for($i=0;$i<3;$i++){        imageline($img, rand(0, $width/2), rand(0, $height), rand($width/2, $width), rand(0, $height), $colorPixel);    }//    imagestring($img,5, 0, 0, ‘abcd‘, $colorPixel);    for($i=0;$i<5;$i++){        $string.=$element[rand(0, count($element)-1)];    }    imagettftext($img, 24, rand(-5, 5), rand(5,15), rand(30, 35), $colorstring, ‘font/yugang.ttf‘, $string);    imagejpeg($img);    imagedestroy($img );?>