Practice 50 PHP Exception Handling Programming Questions

Practice 50 PHP Exception Handling Programming Questions

Q1. Write a PHP program to demonstrate the basic use of try, catch, and finally.  
Input: Divide 10 by 0  
Expected Output: "Exception caught: Division by zero"  

Q2. Write a PHP program to throw a custom exception when a negative number is passed to a function.  
Input: -5  
Expected Output: "Negative numbers are not allowed"  

Q3. Write a PHP program to create a function that throws an exception when a string is empty.  
Input: "" (empty string)  
Expected Output: "Empty string not allowed"  

Q4. Write a PHP program to handle multiple exceptions using multiple catch blocks.  
Input: 10 / 0 and null variable access  
Expected Output: "Division by zero error caught" and "Undefined variable error caught"  

Q5. Write a PHP program to define a custom exception class and use it in a function.  
Input: Age = 15  
Expected Output: "Age must be 18 or above"  

Q6. Write a PHP program to use throw to manually trigger an exception inside a loop.  
Input: Values [1, 2, 3, -1, 5]  
Expected Output: "Negative value found, terminating loop"  

Q7. Write a PHP program to catch an exception inside a function and rethrow it.  
Input: Invalid Email = "test@.com"  
Expected Output: "Invalid email format exception rethrown"  

Q8. Write a PHP program to handle exceptions inside a constructor.  
Input: Invalid Age = -10  
Expected Output: "Invalid age: Cannot be negative"  

Q9. Write a PHP program to use finally block to close a database connection even when an exception occurs.  
Input: Database connection fails  
Expected Output: "Database connection closed"  

Q10. Write a PHP program to define multiple exception classes and catch them separately.  
Input: Invalid Username = "", Invalid Age = -1  
Expected Output: "Invalid username exception" and "Invalid age exception"  

Q11. Write a PHP program to log exceptions into a file using error_log().  
Input: Divide 5 by 0  
Expected Output: "Exception logged in error log file"  

Q12. Write a PHP program to create a function that throws an exception when an array index is out of bounds.  
Input: array[5] (index does not exist)  
Expected Output: "Index out of bounds exception"  

Q13. Write a PHP program to catch an exception and display a user-friendly error message.  
Input: 10 / 0  
Expected Output: "Something went wrong, please try again"  

Q14. Write a PHP program to throw an exception when a file does not exist.  
Input: File = "nonexistent.txt"  
Expected Output: "File not found exception"  

Q15. Write a PHP program to throw an exception if an API response is empty.  
Input: API response = null  
Expected Output: "API response is empty"  

Q16. Write a PHP program to handle exceptions using the Exception class and get the exception message.  
Input: new Exception("Invalid input")  
Expected Output: "Exception: Invalid input"  

Q17. Write a PHP program to catch and handle a DivisionByZeroError exception.  
Input: 10 / 0  
Expected Output: "Cannot divide by zero"  

Q18. Write a PHP program to define a function that throws an exception if a string length exceeds a limit.  
Input: "HelloWorld" (length > 5)  
Expected Output: "String length exceeded limit"  

Q19. Write a PHP program to implement exception handling in a file upload process.  
Input: Invalid file type = .exe  
Expected Output: "Invalid file type exception"  

Q20. Write a PHP program to throw an exception when an array is empty.  
Input: []  
Expected Output: "Array cannot be empty"  

Q21. Write a PHP program to throw an exception when a password is less than 6 characters long.  
Input: "123"  
Expected Output: "Password too short"  

Q22. Write a PHP program to validate an email and throw an exception if it’s invalid.  
Input: "invalidemail"  
Expected Output: "Invalid email address"  

Q23. Write a PHP program to handle exceptions using the getCode() method.  
Input: Exception Code = 404  
Expected Output: "Error Code: 404 - Page Not Found"  

Q24. Write a PHP program to implement a try-catch block inside a loop to handle multiple errors.  
Input: [5, 10, 0, 15]  
Expected Output: "Cannot divide by zero at index 2"  

Q25. Write a PHP program to use getTrace() to print exception trace details.  
Input: Function calls exception  
Expected Output: "Exception occurred in function XYZ at line 10"  

Q26. Write a PHP program to handle exceptions in a recursive function.  
Input: Factorial of -5  
Expected Output: "Factorial of a negative number is not allowed"  

Q27. Write a PHP program to catch an ErrorException.  
Input: trigger_error("Custom error", E_USER_ERROR)  
Expected Output: "Caught custom error exception"  

Q28. Write a PHP program to throw and catch exceptions in an if-else condition.  
Input: Score = -5  
Expected Output: "Score cannot be negative"  

Q29. Write a PHP program to check if an exception message contains a specific word.  
Input: Exception Message = "Invalid Password"  
Expected Output: "Exception contains the word 'Invalid'"  

Q30. Write a PHP program to throw an exception when a user tries to withdraw more than their balance.  
Input: Balance = 1000, Withdrawal = 1500  
Expected Output: "Insufficient balance exception"  
Here are more PHP programming questions on the topic Exception Handling at the easy difficulty level:  

Q31. Write a PHP program to catch and display the exception line number using getLine().  
Input: throw new Exception("Error found")  
Expected Output: "Error found on line 12"  

Q32. Write a PHP program to handle division by zero using an exception.  
Input: 25 / 0  
Expected Output: "Cannot divide by zero"  

Q33. Write a PHP program to handle an exception if a JSON string is invalid.  
Input: "{name: 'John', age: 30}" (missing double quotes)  
Expected Output: "Invalid JSON format"  

Q34. Write a PHP program to throw an exception if a string does not contain any digits.  
Input: "abcdef"  
Expected Output: "String must contain at least one digit"  

Q35. Write a PHP program to validate a phone number and throw an exception if it’s not 10 digits long.  
Input: "98765"  
Expected Output: "Invalid phone number format"  

Q36. Write a PHP program to catch an exception when accessing a private property of a class.  
Input: Attempt to access private $name  
Expected Output: "Cannot access private property"  

Q37. Write a PHP program to catch an exception when calling a method on null object.  
Input: $obj = null; $obj->method();  
Expected Output: "Call to a member function on null"  

Q38. Write a PHP program to create a function that throws an exception when a date is in the past.  
Input: "2020-01-01"  
Expected Output: "Date cannot be in the past"  

Q39. Write a PHP program to validate a username and throw an exception if it contains special characters.  
Input: "John@123"  
Expected Output: "Username contains invalid characters"  

Q40. Write a PHP program to catch and log database connection exceptions.  
Input: Database connection fails  
Expected Output: "Database error logged"  

Q41. Write a PHP program to handle an exception when fopen() fails to open a file.  
Input: "nonexistentfile.txt"  
Expected Output: "File could not be opened"  

Q42. Write a PHP program to throw an exception if a password does not contain an uppercase letter.  
Input: "password123"  
Expected Output: "Password must contain at least one uppercase letter"  

Q43. Write a PHP program to throw an exception if a password does not contain a special character.  
Input: "Password123"  
Expected Output: "Password must contain at least one special character"  

Q44. Write a PHP program to throw an exception when an email domain is not gmail.com.  
Input: "user@yahoo.com"  
Expected Output: "Only Gmail emails are allowed"  

Q45. Write a PHP program to catch an exception when a function is called with missing parameters.  
Input: Function expecting 2 parameters but 1 given  
Expected Output: "Missing required function parameters"  

Q46. Write a PHP program to throw an exception when an image file size exceeds 2MB.  
Input: Image size = 5MB  
Expected Output: "File size exceeds the limit"  

Q47. Write a PHP program to catch an exception when a file extension is not allowed.  
Input: "script.exe"  
Expected Output: "Unsupported file format"  

Q48. Write a PHP program to throw an exception if a string contains more than 3 spaces.  
Input: "Hello  World  !"  
Expected Output: "Too many spaces in input"  

Q49. Write a PHP program to validate an integer and throw an exception if it is a float.  
Input: 12.5  
Expected Output: "Expected an integer, received a float"  

Q50. Write a PHP program to throw an exception if a number is greater than 1000.  
Input: 1500  
Expected Output: "Number exceeds the allowed limit"