代碼是照抄的，為什么是顯示不出來呢，因為沒有源碼，所以，我找不到

image.func.php里面的

<?php

require_once 'string.func.php';

$width=80;

$height=20;

$image=imagecreatetruecolor($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("MSYH.TTF","MSYHBD.TTF","SIMHEI.TTF","SIMKAI.TTF","SIMSUN.TTF");

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);

? ? $fontfiles="../fonts/".$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);

? ? imagettfbbox($image, $size, $angle, $x,$y,$color,$fontfiles,$text);

}

header("content-type:image/gif");

imagegif($image);

imagedestroy($image);

//string.func.php里面的

<?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")));

? ? }

? ? ? ??

? ? if($length>strlen($chars)){

? ? ? ? exit("字符串長度不夠");

? ? }

? ? ? ?$chars=str_shuffle($chars);

? ? ?return ?substr($chars,0, $length);

}

可以幫我找一下嗎