Php validation form check field is empty method, validation Field

Php validation form check field is empty method, validation Field

This example describes how to check whether a field in a php form is empty. Share it with you for your reference. The details are as follows:

Php verifies the form and checks whether the field is empty. If there are unfilled fields in the form, an error message is displayed.

Php back-end code, saved as: ErrorCheck. php

The trim () function removes the trailing and trailing null characters in the string.

" " (ASCII 32 (0×20)), an ordinary space."\t" (ASCII 9 (0×09)), a tab."\n" (ASCII 10 (0x0A)), a new line (line feed)."\r" (ASCII 13 (0x0D)), a carriage return."\0″ (ASCII 0 (0×00)), the NUL-byte."\x0B" (ASCII 11 (0x0B)), a vertical tab.
I hope this article will help you with php programming.