PHP Output all error messages

Method one modifies php.ini

, display error message
display_errors = on
; display PHP start error message
display_startup_errors = on
; logging error message
log_errors = On

Method two PHP files that need to be debugged are added in the first line

Ini_set (' display_errors ', 1);            Error message
ini_set (' display_startup_errors ', 1);    PHP Startup error message
error_reporting ( -1);                    Print out all error messages
ini_set (' Error_log ', DirName (__file__). '/error_log.txt '); Output error messages to a text file