PHP Exception Handling

Syntax

try {
    // code block to be monitored for exception
} catch (Exception $e) {
    // code to handle the exception
}

Example

$num1 = 10;
$num2 = 0;

try {
    if ($num2 === 0) {
        throw new Exception('Division by zero.');
    } else {
        $result = $num1 / $num2;
        echo "Result: " . $result;
    }
} catch (Exception $e) {
    echo "Error: " . $e->getMessage();
}

Output

Error: Division by zero.

Explanation

The try block contains the code that may generate an exception. The catch block contains the code to be executed when an exception occurs. The Exception class is used to define custom exceptions.

In the example above, a message is thrown if the divisor is zero. Since num2 is 0, an error is generated and the message is displayed using the getMessage() function.

Use

Exception handling is used to handle errors that occur during program execution. It allows the programmer to gracefully handle errors and prevent the program from terminating prematurely.

Important Points

• Exceptions are thrown using the throw statement
• Exceptions are caught using the try and catch blocks
• The Exception class is used to define custom exceptions
• Exception handling allows for graceful error handling and prevents program termination

Summary

PHP exception handling allows for graceful error handling by catching exceptions that may occur during program execution. The code that may generate an exception is placed in a try block and the code to be executed when an exception occurs are placed in a catch block. The Exception class is used to define custom exceptions.