How do I catch notice, warning errors in php?

Notice: Undefined property: stdClass::$xxx in /Applications/xxx/xxx/xxx/xxx.php on line 35

Warning: Invalid argument supplied for foreach() in /Applications/xxx/xxx/xxx/xxx.php on line 35

how can I avoid errors like this in the above
?
if I can, I"d like to change it to my own solution
I won"t blame you for seeing it.

Error_messages error_log php-secure php7 php
Feb.28,2021

users see?
in general, in production systems, the display_errors in php.ini is set to off, so that as long as the user page can be rendered, there will be no error message at the front-end level. When developing, you can write:

at the beginning of the file 
  
  set_error_handler ,  set_exception_handler ,  register_shutdown_function  these three methods, you can find various frameworks to see their error exception takeover, or you can use a ready-made class library like whoops.

Previous: The home page of many websites have such a positioning floating module, what is the general name of this?

Next: Python crawler ip agent problem

css mysql arrays josn react html typescript webpack npm sass R objective-c .net sql-server jquery python-3.x angularjs django angular excel regex iphone ajax linux xml pandas vba spring database wordpress string wpf xcode windows bash postgresql oracle multithreading eclipse list firebase algorithm macos forms image scala visual-studio azure bootstrap spring-boot react-native python-2.7 docker performance function winforms matlab powershell apache dataframe api sqlite numpy rest shell selenium flutter dart maven loops qt swing android-studio csv express file class tensorflow sorting codeigniter perl
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1e3eed8-43d3a.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e3eed8-43d3a.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
Need Help?