PHP Exception Handling: Multiple catch blocks

PHP Exception Handling: Exercise-7 with Solution

Write a PHP program that implements multiple catch blocks to handle different types of exceptions.

Sample Solution:

PHP Code :

<?php
try {
    // Code that may throw different types of exceptions
    $number = "abc";
    
    if (!is_numeric($number)) {
        throw new InvalidArgumentException("Invalid number.");
    }
    
    $result = 100 / $number;
    echo "Result: " . $result;
} catch (InvalidArgumentException $e) {
    // Handle InvalidArgumentException
    echo "InvalidArgumentException: " . $e->getMessage();
} catch (DivisionByZeroError $e) {
    // Handle DivisionByZeroError
    echo "DivisionByZeroError: " . $e->getMessage();
} catch (Throwable $e) {
    // Handle generic Throwable (catches any other type of exception)
    echo "An error occurred: " . $e->getMessage();
}
?>

Sample Output:

InvalidArgumentException: Invalid number.

Explanation:

In the above exercise,

We have a try block that contains code that throws different types of exceptions. We first check if the $number is numeric using is_numeric() function and throw an InvalidArgumentException if it's not.

Then, we attempt a division operation with $number to trigger a DivisionByZeroError if the number is zero.

The catch blocks are defined to handle specific exception types.

• The first catch block catches InvalidArgumentException and displays an appropriate error message.
• The second catch block catches DivisionByZeroError and handles it accordingly.
• The third catch block catches Throwable, which is the base class for all exceptions, and handles any other type of exception that may occur.

Flowchart:

PHP Code Editor:

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