Exceptions in PHP: The exception is the one that describes the error or unexpected behavior of the PHP script. The exception is thrown in many PHP tasks and classes. User-defined tasks and classes can also do differently. The exception is a good way to stop work when it comes to data that it can use.
Throw Exceptions in PHP: The throw statement in PHP allows for a defined function or method to do otherwise. If alternatives are thrown, the following code will not be used. If the exception is not detected, a dangerous error will occur with the message “Uncaught Exception”.
Example 1:
PHP
<?php function division_operation($dividend, $divisor) { if($divisor == 0) { throw new Exception("Divide by Zero Error"); } return $dividend / $divisor; } echo division_operation(12, 0); ?> |
Output:
Example 2: The following example demonstrates the use of the PHP try…catch statement to avoid the above scenario.
PHP
<?php function division_operation($dividend, $divisor) { if($divisor == 0) { throw new Exception("Raise Exception : Division by 0"); } return $dividend / $divisor; } try { echo division_operation(12, 0); } catch(Exception $e) { echo "Exception is Caught! : Unable to divide by 0"; } ?> |
Output:
Exception is Caught! : Unable to divide by 0
Handling exceptions using try … catch … finally:
Example 3: In the following code, whatever is present in the “finally” statement will be executed regardless of the exception.
PHP
<?php function division_operation($dividend, $divisor) { if($divisor == 0) { throw new Exception("Raise Exception : Division by 0"); } return $dividend / $divisor; } try { echo division_operation(12, 0); } catch(Exception $e) { echo "Exception is Caught! : Unable to divide by 0........"; } finally { echo "Finally block execution - Process complete."; } ?> |
Output:
Exception is Caught! : Unable to divide by 0........Finally
block execution - Process complete.
