PHP Exception Handling: Multiple catch blocks

Last update on December 20 2024 10:21:07 (UTC/GMT +8 hours)

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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