PHP Error Level

PHP error level: Deprecated: Deprecated (does not  affect program run) Notice: Notification level error  undefined does not exist such as notification error  (does not affect program run) Warning: Warning Level   (Does not affect program operation) Fatal ERR: Fatal error   (run terminate run) Parse error: Syntax parsing wrong  program is not running when parsing occurs error  such as less write a semicolon syntax parsing error will be displayed  in any case Even if the error message is masked error level setting: Php.inierror_reporting = E_all             Show All errors error_reporting = E_all&~e_notice   Show all errors except E_ Noticedisplay_errors = on                 whether to show error in PHP code dynamic settings: error_reporting (); error_reporting (E_all);  Show all Error error_reporting ( -1);     Show all error error_reporting (0);      Ini_set (' error_reporting ', 0) can also be used to close all errors;  Set the error level Trigger_error (' error has occurred ', e_user_warning);  Manual Throw Error Logging error: Php.inilog_errors = on          Whether the error log is turned on error_log = "E:/wamp/logs/php_error.log"   error log file Log_errors_max_ Len       log_errors The maximum byte ignone_repeatad_errors   whether to ignore duplicate error messages Ignone_repeatad_source   whether to ignore the source of the duplicate error message in the actual project You can set display_errors to Off without displaying an error message Error_log ()  function  calls Error_log write custom error message if ($a!==true) {error_log (' variable A is not true ') ; }

　　

PHP Error level