PHP 出现乱码和Sessions验证问题的解决方法！_PHP
在PHP脚本中读出中文或者其他语言文字为乱码的时候，首先检查你的文件格式是不是用UTF8的编码格式保存的。如果不是请用UltraEdit...等一些对UTF8支持转换的工具转换一下,最好不要用MS的记事本直接另存为转换，我开始的时候就是犯了这样一个错误。如果你是在 Dreamweaver 中编辑请按照：编辑---》首选参数---》新建文档 把语言设置为UTF8编码.
关于SESSION验证问题：一开始我的文档都是用GB2312编写的，后来有一个网站需要用UTF-8的编码，我就把我的一些文件用MS的记事本打开后，另存为UTF-8编码了，没想到他会在脚本程序的文件头加上一句签名（BOM）所以我直接转换了得出的结果就是错误了：Cannot send session cookie - headers already sent by...
郁闷地调试了好久才找出三种解决办法：
第一种是就如刚才所说的，把源来的文件用Dreamweaver 或UltraEdit...等一些对UTF8支持转换的工具转换一下，这是最根本的解决办法；
第二种是在session_start()函数前面 加了一个“@”
第三种是在打开phpinfo()，看看Output_buffering这个参数是否为no value ，是的话设置成 1
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