Warning:Cannot modify header information - headers already sent by (output started at这个错误你是不是解决了?怎么解决的?

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Warning:Cannot modify header information - headers already sent by (output started at这个错误你是不是解决了?怎么解决的?
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Warning:Cannot modify header information - headers already sent by (output started at这个错误你是不是解决了?怎么解决的?
Warning:Cannot modify header information - headers already sent by (output started at
这个错误你是不是解决了?怎么解决的?

Warning:Cannot modify header information - headers already sent by (output started at这个错误你是不是解决了?怎么解决的?
出这个错误是因为 header('Content-Type:text/html;charset= UTF-8');发送头之前不能有任何输出,空格也不行,你需要将header(...)之前的空格去掉,或者其他输出的东西去掉,如果他上面include其他文件了,你还要检查其他文件里是否有输出

Warning: Cannot modify header information - headers already sent by (不然你header之前就打印了内容,这肯定报错。建议你看下header用法 看