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c91080d Release 6.5.0
John Mertic authored Jun 6, 2012
1 <?php
2 /**
3 * Zend Framework
4 *
5 * LICENSE
6 *
7 * This source file is subject to the new BSD license that is bundled
8 * with this package in the file LICENSE.txt.
9 * It is also available through the world-wide-web at this URL:
10 * http://framework.zend.com/license/new-bsd
11 * If you did not receive a copy of the license and are unable to
12 * obtain it through the world-wide-web, please send an email
13 * to license@zend.com so we can send you a copy immediately.
14 *
15 * @category Zend
16 * @package Zend
17 * @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
18 * @license http://framework.zend.com/license/new-bsd New BSD License
19 */
20
21 /**
22 * @category Zend
23 * @package Zend
24 * @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
25 * @license http://framework.zend.com/license/new-bsd New BSD License
26 */
27 class Zend_Exception extends Exception
28 {
29 /**
30 * @var null|Exception
31 */
32 private $_previous = null;
33
34 /**
35 * Construct the exception
36 *
37 * @param string $msg
38 * @param int $code
39 * @param Exception $previous
40 * @return void
41 */
42 public function __construct($msg = '', $code = 0, Exception $previous = null)
43 {
44 if (version_compare(PHP_VERSION, '5.3.0', '<')) {
45 parent::__construct($msg, (int) $code);
46 $this->_previous = $previous;
47 } else {
48 parent::__construct($msg, (int) $code, $previous);
49 }
50 }
51
52 /**
53 * Overloading
54 *
55 * For PHP < 5.3.0, provides access to the getPrevious() method.
56 *
57 * @param string $method
58 * @param array $args
59 * @return mixed
60 */
61 public function __call($method, array $args)
62 {
63 if ('getprevious' == strtolower($method)) {
64 return $this->_getPrevious();
65 }
66 return null;
67 }
68
69 /**
70 * String representation of the exception
71 *
72 * @return string
73 */
74 public function __toString()
75 {
76 if (version_compare(PHP_VERSION, '5.3.0', '<')) {
77 if (null !== ($e = $this->getPrevious())) {
78 return $e->__toString()
79 . "\n\nNext "
80 . parent::__toString();
81 }
82 }
83 return parent::__toString();
84 }
85
86 /**
87 * Returns previous Exception
88 *
89 * @return Exception|null
90 */
91 protected function _getPrevious()
92 {
93 return $this->_previous;
94 }
95 }
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