php报错：Cannot send session cookie – headers already sent by的解决方法

2. UTF-8 EF BB BF
3. UTF-16 Big Endian FE FF
4. UTF-16 Little Endian FF FE
5. UTF-32 Big Endian 00 00 FE FF
6. UTF-32 Little Endian FF FE 00 00

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解决方法： 在进行PHP session 操作时，如果出现：Warning: Cannot send session cookie – headers already sent…”或者“Cannot add header information – headers already sent…”

只需对php.ini中的Output_buffering进行设置，默认值为no，修改为1即可。