Recap: Input Validation

Part of the Logic & Flow section of Coddy's PHP journey — lesson 58 of 68.

Challenge

Easy

You will receive four inputs: an email address string, a phone number string, a minimum age number, and an actual age number.

Create two custom exception classes:

InvalidEmailException that extends the base Exception class
InvalidAgeException that extends the base Exception class

Create a function called validateUserData that accepts four parameters: email, phone, minimum age, and actual age. Inside this function:

Check if the email contains the @ symbol. If it doesn't, throw an InvalidEmailException with the message "Email must contain @ symbol"
Check if the phone number length is exactly 10 characters. If it's not, throw a generic Exception with the message "Phone number must be 10 digits"
Check if the actual age is less than the minimum age. If it is, throw an InvalidAgeException with the message "User must be at least X years old" (where X is the minimum age value)
If all validations pass, print "User data is valid"

Use a try...catch...finally block to call the function with the provided inputs. Create two separate catch blocks:

The first catch block should catch InvalidEmailException and print "Email error: " followed by the exception message
The second catch block should catch InvalidAgeException and print "Age error: " followed by the exception message
Add a third catch block that catches any other Exception and prints "Validation error: " followed by the exception message

In the finally block, print "Validation process completed".

Input format:

First line: A string representing the email address (example: user@example.com or invalidemail.com)
Second line: A string representing the phone number (example: 1234567890 or 12345)
Third line: An integer representing the minimum age requirement (example: 18)
Fourth line: An integer representing the actual age (example: 25 or 16)

Expected output:

If all data is valid: User data is valid followed by Validation process completed on a new line
If email is invalid: Email error: Email must contain @ symbol followed by Validation process completed on a new line
If phone number is invalid: Validation error: Phone number must be 10 digits followed by Validation process completed on a new line
If age is below minimum: Age error: User must be at least X years old (where X is the minimum age) followed by Validation process completed on a new line

Try it yourself

<?php
// Read inputs
$email = trim(fgets(STDIN));
$phone = trim(fgets(STDIN));
$minAge = intval(fgets(STDIN));
$actualAge = intval(fgets(STDIN));

// TODO: Create custom exception classes here
// Create InvalidEmailException class
// Create InvalidAgeException class

// TODO: Create validateUserData function here
// The function should accept four parameters: email, phone, minAge, actualAge
// Implement validation logic inside the function

// TODO: Use try...catch...finally block to call the function
// Call validateUserData with the input values
// Add catch blocks for InvalidEmailException, InvalidAgeException, and generic Exception
// Add finally block

?>

Recap: Input Validation

All lessons in Logic & Flow