<?php
require_once 'string.func.php';
//GD库做验证码
$width=80;
$height=30;
//创建画布
$image=imagecreatetruecolor($width, $height);
$white=imagecolorallocate($image, 255, 255, 255);
$black=imagecolorallocate($image, 0, 0, 0);
//用填充矩形填充画布
imagefilledrectangle($image, 1, 1, $width-2, $height-2, $white);
$type=1;
$length=4;
$chars=buildRandomString($type,$length);
$sess_name="varify";
$_SESSION[$sess_name]=$chars;
$fontfiles=array("MSYH.TTF","MSYHBD.TTF","SIMSUN.TTC");
for($i=0;$i<$length;$i++){
$size=mt_rand(14, 18);
$angle=mt_rand(-15, 15);
$x=5+$i*$size;
$y=mt_rand(20, 26);
$color=imagecolorallocate($image, mt_rand(50, 90), mt_rand(80, 200), mt_rand(90, 180));
$fontfile='F:/wamp/www/shop/shopimooc/fonts/'.$fontfiles[mt_rand(0, count($fontfiles)-1)];
$text=substr($chars, $i,1);
imagettftext($image, $size, $angle, $x, $y, $color, $fontfile, $text);
}
ob_clean();
header("content-type:image/gif");
imagegif($image);
imagedestroy($image);
老师我的为什么这样啊 已经弄了好久了还是这样