?<?php
?require_once'string.func.php';
?//通過gd庫做驗證碼
?//創建畫布
?$width=80;
?$height=28;
?$image=imagecreatetruecolor($width,$height);
?$white=imagecolorallocate($image,255,255,255);
?$black=imagecolorallocate($image,0,0,0);
?//用填充矩形填充畫布
?imagefilledrectangle($image,1,1,$width-2,$height-2,$white);
?$type=1;
?$length=4;
?$chars=bulidRandomString($type,$length);
?$sees_name="verify";
?$_SESSION[$sess_name]=$chars;
?$fontfiles=array("Deng.ttf","Dengb.ttf","Dengl.ttf","msyh.ttf"."msyhbd.ttc","msyhl.ttc","simhei.ttf","simsun.ttc");
?for($i=9;$i<$length;$i++){
?$size=mt_rand(14,18);
?$angle=mt_rand(-15,15);
?$x=5+$i*$size;
?$y=mt_rand(20,26);
?$fontfile="../fonts/".$fontfiles[mt_rand(0,count($fontfiles)-1)];
?$color=imagecolorallocate($image,mt_rand(50,90),mt_rand(80,200),mt_rand(90,180));
?$text=substr($chars,$i,1);
?imagettftext($image,$size,$angle,$x,$y,$color,$fontfile,$text);
?}

??? /*ob_clean();
?header("content-type:image/gif");
?imagegif($image);
?imagedestroy($image);*/

?<?php
?function bulidRandomString($type=1,$length=4){
?if($type==1){
?$chars=join("",range(0,9));
?}elseif($type==2){
??$chars=join("",array_merge(range("a","z"),range("A","Z")));
?}elseif($type==3){
??$chars=join("",array_merge(range("a","z"),range("A","Z"),range(0,9)));
?}
?if($length>strlen($chars)){
??exit("字符串長度不夠");
?}
?$chars=str_shuffle($chars);
?return substr($chars,0,$length);
?}