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php 生成 验证码展示不出来

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Release： 2016-06-13 12:49:18
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php 生成 验证码显示不出来
PHP 使用了自己写的一个类库

单独放在一个文件里面 可以显示出来，但是通过路由跳转之后就先是不来了

这个是怎么回事？


------解决方案--------------------
你还是没有数清楚，这两个url的关系
如果 test3.php 是通过下面的连接执行的，那你首先要考虑到你练得程序多输出了什么？
比如 BOM头、空格、空行以及其他不是图片数据里的东西
Related labels：
bom nbsp php test url
source：php.cn
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