Exception Handling

Exception Handling in PHP

Exception

<!DOCTYPE html PUBLIC “-//W3C//DTD XHTML 1.0 Transitional//EN” “http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd”>
<html xmlns=”http://www.w3.org/1999/xhtml”>
<head>
<meta http-equiv=”Content-Type” content=”text/html; charset=iso-8859-1″ />
<title>Untitled Document</title>
</head>

<body>

<?php
function inverse($x) {
if (!$x) {
throw new Exception(‘Division by zero.’);
}
else return 1/$x;
}

try {
echo inverse(5) . “<br>”;
echo inverse(0) . “<br>”;
} catch (Exception $e) {
echo ‘Caught exception: ‘, $e->getMessage(), “\n”;
}

// Continue execution
echo ‘<br>Hello World’;
?>

</body>
</html>

 

UserDefinedExceptionWithNestedException

<!DOCTYPE html PUBLIC “-//W3C//DTD XHTML 1.0 Transitional//EN” “http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd”>
<html xmlns=”http://www.w3.org/1999/xhtml”>
<head>
<meta http-equiv=”Content-Type” content=”text/html; charset=iso-8859-1″ />
<title>Untitled Document</title>
</head>

<body>
<?php

class MyException extends Exception { }

class Test {
public function testing() {
try {
try {
throw new MyException(‘foo!’);
} catch (MyException $e) {
/* rethrow it */
throw $e;
}
} catch (Exception $e) {
var_dump($e->getMessage());
}
}
}

$foo = new Test;
$foo->testing();
?>
</body>
</html>

 

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