php 页面中出现 Notice: A session had already been started – ignoring session_start报错信息，出现这个错误提示，是因为页面中多次启用了session_start会话导致。
对于上述的解决方案是：找到报错行，去除session_start会话。
Notice: A session had already been started – ignoring session_start
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php 页面中出现 Notice: A session had already been started – ignoring session_start报错信息，出现这个错误提示，是因为页面中多次启用了session_start会话导致。
对于上述的解决方案是：找到报错行，去除session_start会话。