php随机验证码图片显示不出来答:直接运行就可以了 <?for($i=0;$i<4;$i++){ $rand.=dechex(rand(0,15));}header('Content-Type: image/png');$im = imagecreatetruecolor(75,25);$blue = imagecolorallocate($im,0,102,255);imagefill($im,0,0,$blue);$white = imagecolorallocate($im,255,255,255);imageline(...