1.首先，打开application下的config.php文件，将log配置打开如下
/*|--------------------------------------------------------------------------| Error Logging Threshold|--------------------------------------------------------------------------|| You can enable error logging by setting a threshold over zero. The| threshold determines what gets logged. Threshold options are:|| ???0 = Disables logging, Error logging TURNED OFF| ???1 = Error Messages (including PHP errors)| ???2 = Debug Messages| ???3 = Informational Messages| ???4 = All Messages|| You can also pass an array with threshold levels to show individual error types|| ????array(2) = Debug Messages, without Error Messages|| For a live site you‘ll usually only enable Errors (1) to be logged otherwise| your log files will fill up very fast.|*/$config[‘log_threshold‘] = 4;
2.在控制器里面输入，并在浏览器打开该控制器
???public function get_payee_summary() ???{ ???????????log_message(‘info‘,‘log_test:log测试‘); ???} ???3.最后就能在application下的logs文件夹里面开到最近生成的log文件
php CI框架log写入
原文地址：https://www.cnblogs.com/aj407blogs/p/9781797.html