Handle error form PHP

Question

how to handle error (after submit) when any blank fill on the form PHP?

Answer 1

You need to make controls about whitespaces too, you would prefer to use trim() to delete them automatically, naturally... make your controls based on your needs!

The code (at least at the basic level) looks like:

https://code.sololearn.com/wHU6s8w53qVM/?ref=app

You can also define your own Exception, if you are using namespaces make sure to put a backslash (\) before to extend the Exception class:

https://code.sololearn.com/wE7zBruG55Z5/?ref=app

^^

Answer 2

To add to what @Maz already said, if, there's any data passed in as empty (blank) but it was not supposed to be (it is a required field) then you must ask the client user to complete the form, showing a note or warning pointing at which form field was incomplete.