PHP Taskbook Level 5.7

When the page refreshes, generate five random number inputs.

Given a form with textarea. Make it so that after sending the form in textarea the entered text remains.

A form with inputs is given. Data is entered into the inputs. Bind a validation rule to each input. After submitting the form, if the data in the input is incorrect, display a message about this above it.

A form with an input is given. A number is entered into the input. After sending the form, you will receive an array of divisors of the number and output them to a paragraph separated by commas.

A form with two inputs is given. Numbers are entered into the inputs. After submitting the form, get an array of common divisors of these numbers and output them as a list ul.

A form with an input is given. A phone number is entered into the input. After sending the form, check the format of the entered number. If it is correct, then paint the input border green, and if it is incorrect, then paint it red.