<?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;
$chars=buildRandomString($type,$length);
$sess_name="verify";
$_SESSION[$sess_name]=$chars;
$fontfiles=array("FZYTK.TTF","SIMLI.TTF","SIMYOU.TTF","STCAIYUN.TTF","STXINGKA.TTF");
for?($i=0;$i<$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,?$text);
}
header("content-type:image/gif");
imagegif($image);
imagedestroy($image);
2016-05-05
我的代碼里面沒有session_start(),也只顯示畫布沒有數字，代碼檢查超過一百遍了，無法進行下一步的學習，卡住了。。。。
2015-12-01
解決了，，，將fonts中加入相應的字體文件（SIMYOU.TTF），再將lid下的image.func.php文件中的session_start();去掉
2015-08-31
string.func.php
<?php function?buildRandomString($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); substr($chars,0?,$length); }