php - The openid obtained by the helper is stored in the session. The first time it is obtained, the second time and other pages cannot be obtained.

Question

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我想大声告诉你 · Answer

Pay attention to whether session_start is not enabled

迷茫 · Answer

Is it a cross-domain problem?
Does the directory where the server stores session files have read and write permissions?
session.use_trans_sid = 0 in php.ini or the --enable-trans-sid option is not turned on when compiling