出现以下错误，错误位置的代码是：session_start();
各位老大，帮帮我，谢谢。
Warning: open(/tmp\sess_6aa1bb61bdb8a0146bfb760177022b78, O_RDWR) failed: m (2) in C:\apache\htdocs\mu1\admin\check.php on line 46

Warning: Cannot add header information - headers already sent by (output started at C:\apache\htdocs\mu1\admin\check.php:46) in C:\apache\htdocs\mu1\admin\check.php on line 53

Warning: open(/tmp\sess_6aa1bb61bdb8a0146bfb760177022b78, O_RDWR) failed: m (2) in C:\apache\htdocs\mu1\admin\check.php on line 0

Warning: Failed to write session data (files). Please verify that the current setting of session.save_path is correct (/tmp) in C:\apache\htdocs\mu1\admin\check.php on line 0