PHP 5 comes with an exception model similar to that of other coding languages. Exceptions are essential and supplies a better management around problem managing.

Try - Operate utilizing an exception to this rule ought to be within a "try" obstruct. In the event the exception to this rule will not trigger, this value can go on while typical. On the other hand the exception to this rule invokes, the exception to this rule is actually "thrown".

Throw - This is actually how we trigger the exception to this rule. Each "throw" should have a minimum of one "catch".

Catch - Some sort of "catch" obstruct retrieves the exception to this rule as well as produces the item that contains this exception to this rule information.

When a difference will be placed, program code following an affirmation won't be carried out, along with PHP will attempt to discover the 1st related hook block. When a difference is just not found, some sort of PHP Deadly Miscalculation is going to be released by having an "Uncaught Exception.

A difference can be placed, along with found ("catched") in PHP. Rule can be encircled in a test block. Every test must have at least one corresponding hook block. Numerous hook prevents can often hook distinct instructional classes connected with exceptions.
Exclusions can be placed (or re-thrown) in a hook block.

Example
Following is the piece of code:- copy and paste this code into a file and verify the result.

<?php
try {
    $error = 'Always throw this error';
    throw new Exception($error);

    // Code following an exception is not executed.
    echo 'Never executed';

} catch (Exception $e) {
    echo 'Caught exception: ',  $e->getMessage(), "\n";
}

// Continue execution
echo 'Hello World';
?>

Inside the over case $e->getMessage function is actually used for getting malfunction meaning. You can find using features which can be utilized from Exception class.

1) getMessage()- message connected with exception
2) getCode() - code connected with exception
3) getFile() - source filename
4) getLine() - source brand
5) getTrace() - n variety of the particular backtrace()
6) getTraceAsString() - formatted string connected with track

Create Custom Exception Handler & you can specify your custom exception handler. Employ using function to put a user-defined exception handler function.
string set_exception_handler ( callback $exception_handler )
Here exception_handler is the particular label with the function to be referred to as whenever an uncaught exception happens. This specific function have to be described ahead of contacting set_exception_handler().

Example

<?php
function exception_handler($exception) {
  echo "Uncaught exception: " , $exception->getMessage(), "\n";
}

set_exception_handler('exception_handler');

throw new Exception('Uncaught Exception');

echo "Not Executed\n";
?>