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<?php
2
/**
3
 * PEAR, the PHP Extension and Application Repository
4
 *
5
 * PEAR class and PEAR_Error class
6
 *
7
 * PHP versions 4 and 5
8
 *
9
 * LICENSE: This source file is subject to version 3.0 of the PHP license
10
 * that is available through the world-wide-web at the following URI:
11
 * http://www.php.net/license/3_0.txt.  If you did not receive a copy of
12
 * the PHP License and are unable to obtain it through the web, please
13
 * send a note to license@php.net so we can mail you a copy immediately.
14
 *
15
 * @category   pear
16
 * @package    PEAR
17
 * @author     Sterling Hughes <sterling@php.net>
18
 * @author     Stig Bakken <ssb@php.net>
19
 * @author     Tomas V.V.Cox <cox@idecnet.com>
20
 * @author     Greg Beaver <cellog@php.net>
21
 * @copyright  1997-2006 The PHP Group
22
 * @license    http://www.php.net/license/3_0.txt  PHP License 3.0
23
 * @version    CVS: $Id: PEAR.php,v 1.3 2007-08-05 09:05:58 jp_milcent Exp $
24
 * @link       http://pear.php.net/package/PEAR
25
 * @since      File available since Release 0.1
26
 */
27
 
28
/**#@+
29
 * ERROR constants
30
 */
31
define('PEAR_ERROR_RETURN',     1);
32
define('PEAR_ERROR_PRINT',      2);
33
define('PEAR_ERROR_TRIGGER',    4);
34
define('PEAR_ERROR_DIE',        8);
35
define('PEAR_ERROR_CALLBACK',  16);
36
/**
37
 * WARNING: obsolete
38
 * @deprecated
39
 */
40
define('PEAR_ERROR_EXCEPTION', 32);
41
/**#@-*/
42
define('PEAR_ZE2', (function_exists('version_compare') &&
43
                    version_compare(zend_version(), "2-dev", "ge")));
44
 
45
if (substr(PHP_OS, 0, 3) == 'WIN') {
46
    define('OS_WINDOWS', true);
47
    define('OS_UNIX',    false);
48
    define('PEAR_OS',    'Windows');
49
} else {
50
    define('OS_WINDOWS', false);
51
    define('OS_UNIX',    true);
52
    define('PEAR_OS',    'Unix'); // blatant assumption
53
}
54
 
55
// instant backwards compatibility
56
if (!defined('PATH_SEPARATOR')) {
57
    if (OS_WINDOWS) {
58
        define('PATH_SEPARATOR', ';');
59
    } else {
60
        define('PATH_SEPARATOR', ':');
61
    }
62
}
63
 
64
$GLOBALS['_PEAR_default_error_mode']     = PEAR_ERROR_RETURN;
65
$GLOBALS['_PEAR_default_error_options']  = E_USER_NOTICE;
66
$GLOBALS['_PEAR_destructor_object_list'] = array();
67
$GLOBALS['_PEAR_shutdown_funcs']         = array();
68
$GLOBALS['_PEAR_error_handler_stack']    = array();
69
 
70
@ini_set('track_errors', true);
71
 
72
/**
73
 * Base class for other PEAR classes.  Provides rudimentary
74
 * emulation of destructors.
75
 *
76
 * If you want a destructor in your class, inherit PEAR and make a
77
 * destructor method called _yourclassname (same name as the
78
 * constructor, but with a "_" prefix).  Also, in your constructor you
79
 * have to call the PEAR constructor: $this->PEAR();.
80
 * The destructor method will be called without parameters.  Note that
81
 * at in some SAPI implementations (such as Apache), any output during
82
 * the request shutdown (in which destructors are called) seems to be
83
 * discarded.  If you need to get any debug information from your
84
 * destructor, use error_log(), syslog() or something similar.
85
 *
86
 * IMPORTANT! To use the emulated destructors you need to create the
87
 * objects by reference: $obj =& new PEAR_child;
88
 *
89
 * @category   pear
90
 * @package    PEAR
91
 * @author     Stig Bakken <ssb@php.net>
92
 * @author     Tomas V.V. Cox <cox@idecnet.com>
93
 * @author     Greg Beaver <cellog@php.net>
94
 * @copyright  1997-2006 The PHP Group
95
 * @license    http://www.php.net/license/3_0.txt  PHP License 3.0
96
 * @version    Release: 1.6.1
97
 * @link       http://pear.php.net/package/PEAR
98
 * @see        PEAR_Error
99
 * @since      Class available since PHP 4.0.2
100
 * @link        http://pear.php.net/manual/en/core.pear.php#core.pear.pear
101
 */
102
class PEAR
103
{
104
    // {{{ properties
105
 
106
    /**
107
     * Whether to enable internal debug messages.
108
     *
109
     * @var     bool
110
     * @access  private
111
     */
112
    var $_debug = false;
113
 
114
    /**
115
     * Default error mode for this object.
116
     *
117
     * @var     int
118
     * @access  private
119
     */
120
    var $_default_error_mode = null;
121
 
122
    /**
123
     * Default error options used for this object when error mode
124
     * is PEAR_ERROR_TRIGGER.
125
     *
126
     * @var     int
127
     * @access  private
128
     */
129
    var $_default_error_options = null;
130
 
131
    /**
132
     * Default error handler (callback) for this object, if error mode is
133
     * PEAR_ERROR_CALLBACK.
134
     *
135
     * @var     string
136
     * @access  private
137
     */
138
    var $_default_error_handler = '';
139
 
140
    /**
141
     * Which class to use for error objects.
142
     *
143
     * @var     string
144
     * @access  private
145
     */
146
    var $_error_class = 'PEAR_Error';
147
 
148
    /**
149
     * An array of expected errors.
150
     *
151
     * @var     array
152
     * @access  private
153
     */
154
    var $_expected_errors = array();
155
 
156
    // }}}
157
 
158
    // {{{ constructor
159
 
160
    /**
161
     * Constructor.  Registers this object in
162
     * $_PEAR_destructor_object_list for destructor emulation if a
163
     * destructor object exists.
164
     *
165
     * @param string $error_class  (optional) which class to use for
166
     *        error objects, defaults to PEAR_Error.
167
     * @access public
168
     * @return void
169
     */
170
    function PEAR($error_class = null)
171
    {
172
        $classname = strtolower(get_class($this));
173
        if ($this->_debug) {
174
            print "PEAR constructor called, class=$classname\n";
175
        }
176
        if ($error_class !== null) {
177
            $this->_error_class = $error_class;
178
        }
179
        while ($classname && strcasecmp($classname, "pear")) {
180
            $destructor = "_$classname";
181
            if (method_exists($this, $destructor)) {
182
                global $_PEAR_destructor_object_list;
183
                $_PEAR_destructor_object_list[] = &$this;
184
                if (!isset($GLOBALS['_PEAR_SHUTDOWN_REGISTERED'])) {
185
                    register_shutdown_function("_PEAR_call_destructors");
186
                    $GLOBALS['_PEAR_SHUTDOWN_REGISTERED'] = true;
187
                }
188
                break;
189
            } else {
190
                $classname = get_parent_class($classname);
191
            }
192
        }
193
    }
194
 
195
    // }}}
196
    // {{{ destructor
197
 
198
    /**
199
     * Destructor (the emulated type of...).  Does nothing right now,
200
     * but is included for forward compatibility, so subclass
201
     * destructors should always call it.
202
     *
203
     * See the note in the class desciption about output from
204
     * destructors.
205
     *
206
     * @access public
207
     * @return void
208
     */
209
    function _PEAR() {
210
        if ($this->_debug) {
211
            printf("PEAR destructor called, class=%s\n", strtolower(get_class($this)));
212
        }
213
    }
214
 
215
    // }}}
216
    // {{{ getStaticProperty()
217
 
218
    /**
219
    * If you have a class that's mostly/entirely static, and you need static
220
    * properties, you can use this method to simulate them. Eg. in your method(s)
221
    * do this: $myVar = &PEAR::getStaticProperty('myclass', 'myVar');
222
    * You MUST use a reference, or they will not persist!
223
    *
224
    * @access public
225
    * @param  string $class  The calling classname, to prevent clashes
226
    * @param  string $var    The variable to retrieve.
227
    * @return mixed   A reference to the variable. If not set it will be
228
    *                 auto initialised to NULL.
229
    */
230
    function &getStaticProperty($class, $var)
231
    {
232
        static $properties;
233
        if (!isset($properties[$class])) {
234
            $properties[$class] = array();
235
        }
236
        if (!array_key_exists($var, $properties[$class])) {
237
            $properties[$class][$var] = null;
238
        }
239
        return $properties[$class][$var];
240
    }
241
 
242
    // }}}
243
    // {{{ registerShutdownFunc()
244
 
245
    /**
246
    * Use this function to register a shutdown method for static
247
    * classes.
248
    *
249
    * @access public
250
    * @param  mixed $func  The function name (or array of class/method) to call
251
    * @param  mixed $args  The arguments to pass to the function
252
    * @return void
253
    */
254
    function registerShutdownFunc($func, $args = array())
255
    {
256
        // if we are called statically, there is a potential
257
        // that no shutdown func is registered.  Bug #6445
258
        if (!isset($GLOBALS['_PEAR_SHUTDOWN_REGISTERED'])) {
259
            register_shutdown_function("_PEAR_call_destructors");
260
            $GLOBALS['_PEAR_SHUTDOWN_REGISTERED'] = true;
261
        }
262
        $GLOBALS['_PEAR_shutdown_funcs'][] = array($func, $args);
263
    }
264
 
265
    // }}}
266
    // {{{ isError()
267
 
268
    /**
269
     * Tell whether a value is a PEAR error.
270
     *
271
     * @param   mixed $data   the value to test
272
     * @param   int   $code   if $data is an error object, return true
273
     *                        only if $code is a string and
274
     *                        $obj->getMessage() == $code or
275
     *                        $code is an integer and $obj->getCode() == $code
276
     * @access  public
277
     * @return  bool    true if parameter is an error
278
     */
279
    function isError($data, $code = null)
280
    {
281
        if (is_a($data, 'PEAR_Error')) {
282
            if (is_null($code)) {
283
                return true;
284
            } elseif (is_string($code)) {
285
                return $data->getMessage() == $code;
286
            } else {
287
                return $data->getCode() == $code;
288
            }
289
        }
290
        return false;
291
    }
292
 
293
    // }}}
294
    // {{{ setErrorHandling()
295
 
296
    /**
297
     * Sets how errors generated by this object should be handled.
298
     * Can be invoked both in objects and statically.  If called
299
     * statically, setErrorHandling sets the default behaviour for all
300
     * PEAR objects.  If called in an object, setErrorHandling sets
301
     * the default behaviour for that object.
302
     *
303
     * @param int $mode
304
     *        One of PEAR_ERROR_RETURN, PEAR_ERROR_PRINT,
305
     *        PEAR_ERROR_TRIGGER, PEAR_ERROR_DIE,
306
     *        PEAR_ERROR_CALLBACK or PEAR_ERROR_EXCEPTION.
307
     *
308
     * @param mixed $options
309
     *        When $mode is PEAR_ERROR_TRIGGER, this is the error level (one
310
     *        of E_USER_NOTICE, E_USER_WARNING or E_USER_ERROR).
311
     *
312
     *        When $mode is PEAR_ERROR_CALLBACK, this parameter is expected
313
     *        to be the callback function or method.  A callback
314
     *        function is a string with the name of the function, a
315
     *        callback method is an array of two elements: the element
316
     *        at index 0 is the object, and the element at index 1 is
317
     *        the name of the method to call in the object.
318
     *
319
     *        When $mode is PEAR_ERROR_PRINT or PEAR_ERROR_DIE, this is
320
     *        a printf format string used when printing the error
321
     *        message.
322
     *
323
     * @access public
324
     * @return void
325
     * @see PEAR_ERROR_RETURN
326
     * @see PEAR_ERROR_PRINT
327
     * @see PEAR_ERROR_TRIGGER
328
     * @see PEAR_ERROR_DIE
329
     * @see PEAR_ERROR_CALLBACK
330
     * @see PEAR_ERROR_EXCEPTION
331
     *
332
     * @since PHP 4.0.5
333
     */
334
 
335
    function setErrorHandling($mode = null, $options = null)
336
    {
337
        if (isset($this) && is_a($this, 'PEAR')) {
338
            $setmode     = &$this->_default_error_mode;
339
            $setoptions  = &$this->_default_error_options;
340
        } else {
341
            $setmode     = &$GLOBALS['_PEAR_default_error_mode'];
342
            $setoptions  = &$GLOBALS['_PEAR_default_error_options'];
343
        }
344
 
345
        switch ($mode) {
346
            case PEAR_ERROR_EXCEPTION:
347
            case PEAR_ERROR_RETURN:
348
            case PEAR_ERROR_PRINT:
349
            case PEAR_ERROR_TRIGGER:
350
            case PEAR_ERROR_DIE:
351
            case null:
352
                $setmode = $mode;
353
                $setoptions = $options;
354
                break;
355
 
356
            case PEAR_ERROR_CALLBACK:
357
                $setmode = $mode;
358
                // class/object method callback
359
                if (is_callable($options)) {
360
                    $setoptions = $options;
361
                } else {
362
                    trigger_error("invalid error callback", E_USER_WARNING);
363
                }
364
                break;
365
 
366
            default:
367
                trigger_error("invalid error mode", E_USER_WARNING);
368
                break;
369
        }
370
    }
371
 
372
    // }}}
373
    // {{{ expectError()
374
 
375
    /**
376
     * This method is used to tell which errors you expect to get.
377
     * Expected errors are always returned with error mode
378
     * PEAR_ERROR_RETURN.  Expected error codes are stored in a stack,
379
     * and this method pushes a new element onto it.  The list of
380
     * expected errors are in effect until they are popped off the
381
     * stack with the popExpect() method.
382
     *
383
     * Note that this method can not be called statically
384
     *
385
     * @param mixed $code a single error code or an array of error codes to expect
386
     *
387
     * @return int     the new depth of the "expected errors" stack
388
     * @access public
389
     */
390
    function expectError($code = '*')
391
    {
392
        if (is_array($code)) {
393
            array_push($this->_expected_errors, $code);
394
        } else {
395
            array_push($this->_expected_errors, array($code));
396
        }
397
        return sizeof($this->_expected_errors);
398
    }
399
 
400
    // }}}
401
    // {{{ popExpect()
402
 
403
    /**
404
     * This method pops one element off the expected error codes
405
     * stack.
406
     *
407
     * @return array   the list of error codes that were popped
408
     */
409
    function popExpect()
410
    {
411
        return array_pop($this->_expected_errors);
412
    }
413
 
414
    // }}}
415
    // {{{ _checkDelExpect()
416
 
417
    /**
418
     * This method checks unsets an error code if available
419
     *
420
     * @param mixed error code
421
     * @return bool true if the error code was unset, false otherwise
422
     * @access private
423
     * @since PHP 4.3.0
424
     */
425
    function _checkDelExpect($error_code)
426
    {
427
        $deleted = false;
428
 
429
        foreach ($this->_expected_errors AS $key => $error_array) {
430
            if (in_array($error_code, $error_array)) {
431
                unset($this->_expected_errors[$key][array_search($error_code, $error_array)]);
432
                $deleted = true;
433
            }
434
 
435
            // clean up empty arrays
436
            if (0 == count($this->_expected_errors[$key])) {
437
                unset($this->_expected_errors[$key]);
438
            }
439
        }
440
        return $deleted;
441
    }
442
 
443
    // }}}
444
    // {{{ delExpect()
445
 
446
    /**
447
     * This method deletes all occurences of the specified element from
448
     * the expected error codes stack.
449
     *
450
     * @param  mixed $error_code error code that should be deleted
451
     * @return mixed list of error codes that were deleted or error
452
     * @access public
453
     * @since PHP 4.3.0
454
     */
455
    function delExpect($error_code)
456
    {
457
        $deleted = false;
458
 
459
        if ((is_array($error_code) && (0 != count($error_code)))) {
460
            // $error_code is a non-empty array here;
461
            // we walk through it trying to unset all
462
            // values
463
            foreach($error_code as $key => $error) {
464
                if ($this->_checkDelExpect($error)) {
465
                    $deleted =  true;
466
                } else {
467
                    $deleted = false;
468
                }
469
            }
470
            return $deleted ? true : PEAR::raiseError("The expected error you submitted does not exist"); // IMPROVE ME
471
        } elseif (!empty($error_code)) {
472
            // $error_code comes alone, trying to unset it
473
            if ($this->_checkDelExpect($error_code)) {
474
                return true;
475
            } else {
476
                return PEAR::raiseError("The expected error you submitted does not exist"); // IMPROVE ME
477
            }
478
        } else {
479
            // $error_code is empty
480
            return PEAR::raiseError("The expected error you submitted is empty"); // IMPROVE ME
481
        }
482
    }
483
 
484
    // }}}
485
    // {{{ raiseError()
486
 
487
    /**
488
     * This method is a wrapper that returns an instance of the
489
     * configured error class with this object's default error
490
     * handling applied.  If the $mode and $options parameters are not
491
     * specified, the object's defaults are used.
492
     *
493
     * @param mixed $message a text error message or a PEAR error object
494
     *
495
     * @param int $code      a numeric error code (it is up to your class
496
     *                  to define these if you want to use codes)
497
     *
498
     * @param int $mode      One of PEAR_ERROR_RETURN, PEAR_ERROR_PRINT,
499
     *                  PEAR_ERROR_TRIGGER, PEAR_ERROR_DIE,
500
     *                  PEAR_ERROR_CALLBACK, PEAR_ERROR_EXCEPTION.
501
     *
502
     * @param mixed $options If $mode is PEAR_ERROR_TRIGGER, this parameter
503
     *                  specifies the PHP-internal error level (one of
504
     *                  E_USER_NOTICE, E_USER_WARNING or E_USER_ERROR).
505
     *                  If $mode is PEAR_ERROR_CALLBACK, this
506
     *                  parameter specifies the callback function or
507
     *                  method.  In other error modes this parameter
508
     *                  is ignored.
509
     *
510
     * @param string $userinfo If you need to pass along for example debug
511
     *                  information, this parameter is meant for that.
512
     *
513
     * @param string $error_class The returned error object will be
514
     *                  instantiated from this class, if specified.
515
     *
516
     * @param bool $skipmsg If true, raiseError will only pass error codes,
517
     *                  the error message parameter will be dropped.
518
     *
519
     * @access public
520
     * @return object   a PEAR error object
521
     * @see PEAR::setErrorHandling
522
     * @since PHP 4.0.5
523
     */
524
    function &raiseError($message = null,
525
                         $code = null,
526
                         $mode = null,
527
                         $options = null,
528
                         $userinfo = null,
529
                         $error_class = null,
530
                         $skipmsg = false)
531
    {
532
        // The error is yet a PEAR error object
533
        if (is_object($message)) {
534
            $code        = $message->getCode();
535
            $userinfo    = $message->getUserInfo();
536
            $error_class = $message->getType();
537
            $message->error_message_prefix = '';
538
            $message     = $message->getMessage();
539
        }
540
 
541
        if (isset($this) && isset($this->_expected_errors) && sizeof($this->_expected_errors) > 0 && sizeof($exp = end($this->_expected_errors))) {
542
            if ($exp[0] == "*" ||
543
                (is_int(reset($exp)) && in_array($code, $exp)) ||
544
                (is_string(reset($exp)) && in_array($message, $exp))) {
545
                $mode = PEAR_ERROR_RETURN;
546
            }
547
        }
548
        // No mode given, try global ones
549
        if ($mode === null) {
550
            // Class error handler
551
            if (isset($this) && isset($this->_default_error_mode)) {
552
                $mode    = $this->_default_error_mode;
553
                $options = $this->_default_error_options;
554
            // Global error handler
555
            } elseif (isset($GLOBALS['_PEAR_default_error_mode'])) {
556
                $mode    = $GLOBALS['_PEAR_default_error_mode'];
557
                $options = $GLOBALS['_PEAR_default_error_options'];
558
            }
559
        }
560
 
561
        if ($error_class !== null) {
562
            $ec = $error_class;
563
        } elseif (isset($this) && isset($this->_error_class)) {
564
            $ec = $this->_error_class;
565
        } else {
566
            $ec = 'PEAR_Error';
567
        }
568
        if ($skipmsg) {
569
            $a = &new $ec($code, $mode, $options, $userinfo);
570
            return $a;
571
        } else {
572
            $a = &new $ec($message, $code, $mode, $options, $userinfo);
573
            return $a;
574
        }
575
    }
576
 
577
    // }}}
578
    // {{{ throwError()
579
 
580
    /**
581
     * Simpler form of raiseError with fewer options.  In most cases
582
     * message, code and userinfo are enough.
583
     *
584
     * @param string $message
585
     *
586
     */
587
    function &throwError($message = null,
588
                         $code = null,
589
                         $userinfo = null)
590
    {
591
        if (isset($this) && is_a($this, 'PEAR')) {
592
            $a = &$this->raiseError($message, $code, null, null, $userinfo);
593
            return $a;
594
        } else {
595
            $a = &PEAR::raiseError($message, $code, null, null, $userinfo);
596
            return $a;
597
        }
598
    }
599
 
600
    // }}}
601
    function staticPushErrorHandling($mode, $options = null)
602
    {
603
        $stack = &$GLOBALS['_PEAR_error_handler_stack'];
604
        $def_mode    = &$GLOBALS['_PEAR_default_error_mode'];
605
        $def_options = &$GLOBALS['_PEAR_default_error_options'];
606
        $stack[] = array($def_mode, $def_options);
607
        switch ($mode) {
608
            case PEAR_ERROR_EXCEPTION:
609
            case PEAR_ERROR_RETURN:
610
            case PEAR_ERROR_PRINT:
611
            case PEAR_ERROR_TRIGGER:
612
            case PEAR_ERROR_DIE:
613
            case null:
614
                $def_mode = $mode;
615
                $def_options = $options;
616
                break;
617
 
618
            case PEAR_ERROR_CALLBACK:
619
                $def_mode = $mode;
620
                // class/object method callback
621
                if (is_callable($options)) {
622
                    $def_options = $options;
623
                } else {
624
                    trigger_error("invalid error callback", E_USER_WARNING);
625
                }
626
                break;
627
 
628
            default:
629
                trigger_error("invalid error mode", E_USER_WARNING);
630
                break;
631
        }
632
        $stack[] = array($mode, $options);
633
        return true;
634
    }
635
 
636
    function staticPopErrorHandling()
637
    {
638
        $stack = &$GLOBALS['_PEAR_error_handler_stack'];
639
        $setmode     = &$GLOBALS['_PEAR_default_error_mode'];
640
        $setoptions  = &$GLOBALS['_PEAR_default_error_options'];
641
        array_pop($stack);
642
        list($mode, $options) = $stack[sizeof($stack) - 1];
643
        array_pop($stack);
644
        switch ($mode) {
645
            case PEAR_ERROR_EXCEPTION:
646
            case PEAR_ERROR_RETURN:
647
            case PEAR_ERROR_PRINT:
648
            case PEAR_ERROR_TRIGGER:
649
            case PEAR_ERROR_DIE:
650
            case null:
651
                $setmode = $mode;
652
                $setoptions = $options;
653
                break;
654
 
655
            case PEAR_ERROR_CALLBACK:
656
                $setmode = $mode;
657
                // class/object method callback
658
                if (is_callable($options)) {
659
                    $setoptions = $options;
660
                } else {
661
                    trigger_error("invalid error callback", E_USER_WARNING);
662
                }
663
                break;
664
 
665
            default:
666
                trigger_error("invalid error mode", E_USER_WARNING);
667
                break;
668
        }
669
        return true;
670
    }
671
 
672
    // {{{ pushErrorHandling()
673
 
674
    /**
675
     * Push a new error handler on top of the error handler options stack. With this
676
     * you can easily override the actual error handler for some code and restore
677
     * it later with popErrorHandling.
678
     *
679
     * @param mixed $mode (same as setErrorHandling)
680
     * @param mixed $options (same as setErrorHandling)
681
     *
682
     * @return bool Always true
683
     *
684
     * @see PEAR::setErrorHandling
685
     */
686
    function pushErrorHandling($mode, $options = null)
687
    {
688
        $stack = &$GLOBALS['_PEAR_error_handler_stack'];
689
        if (isset($this) && is_a($this, 'PEAR')) {
690
            $def_mode    = &$this->_default_error_mode;
691
            $def_options = &$this->_default_error_options;
692
        } else {
693
            $def_mode    = &$GLOBALS['_PEAR_default_error_mode'];
694
            $def_options = &$GLOBALS['_PEAR_default_error_options'];
695
        }
696
        $stack[] = array($def_mode, $def_options);
697
 
698
        if (isset($this) && is_a($this, 'PEAR')) {
699
            $this->setErrorHandling($mode, $options);
700
        } else {
701
            PEAR::setErrorHandling($mode, $options);
702
        }
703
        $stack[] = array($mode, $options);
704
        return true;
705
    }
706
 
707
    // }}}
708
    // {{{ popErrorHandling()
709
 
710
    /**
711
    * Pop the last error handler used
712
    *
713
    * @return bool Always true
714
    *
715
    * @see PEAR::pushErrorHandling
716
    */
717
    function popErrorHandling()
718
    {
719
        $stack = &$GLOBALS['_PEAR_error_handler_stack'];
720
        array_pop($stack);
721
        list($mode, $options) = $stack[sizeof($stack) - 1];
722
        array_pop($stack);
723
        if (isset($this) && is_a($this, 'PEAR')) {
724
            $this->setErrorHandling($mode, $options);
725
        } else {
726
            PEAR::setErrorHandling($mode, $options);
727
        }
728
        return true;
729
    }
730
 
731
    // }}}
732
    // {{{ loadExtension()
733
 
734
    /**
735
    * OS independant PHP extension load. Remember to take care
736
    * on the correct extension name for case sensitive OSes.
737
    *
738
    * @param string $ext The extension name
739
    * @return bool Success or not on the dl() call
740
    */
741
    function loadExtension($ext)
742
    {
743
        if (!extension_loaded($ext)) {
744
            // if either returns true dl() will produce a FATAL error, stop that
745
            if ((ini_get('enable_dl') != 1) || (ini_get('safe_mode') == 1)) {
746
                return false;
747
            }
748
            if (OS_WINDOWS) {
749
                $suffix = '.dll';
750
            } elseif (PHP_OS == 'HP-UX') {
751
                $suffix = '.sl';
752
            } elseif (PHP_OS == 'AIX') {
753
                $suffix = '.a';
754
            } elseif (PHP_OS == 'OSX') {
755
                $suffix = '.bundle';
756
            } else {
757
                $suffix = '.so';
758
            }
759
            return @dl('php_'.$ext.$suffix) || @dl($ext.$suffix);
760
        }
761
        return true;
762
    }
763
 
764
    // }}}
765
}
766
 
767
// {{{ _PEAR_call_destructors()
768
 
769
function _PEAR_call_destructors()
770
{
771
    global $_PEAR_destructor_object_list;
772
    if (is_array($_PEAR_destructor_object_list) &&
773
        sizeof($_PEAR_destructor_object_list))
774
    {
775
        reset($_PEAR_destructor_object_list);
776
        if (PEAR::getStaticProperty('PEAR', 'destructlifo')) {
777
            $_PEAR_destructor_object_list = array_reverse($_PEAR_destructor_object_list);
778
        }
779
        while (list($k, $objref) = each($_PEAR_destructor_object_list)) {
780
            $classname = get_class($objref);
781
            while ($classname) {
782
                $destructor = "_$classname";
783
                if (method_exists($objref, $destructor)) {
784
                    $objref->$destructor();
785
                    break;
786
                } else {
787
                    $classname = get_parent_class($classname);
788
                }
789
            }
790
        }
791
        // Empty the object list to ensure that destructors are
792
        // not called more than once.
793
        $_PEAR_destructor_object_list = array();
794
    }
795
 
796
    // Now call the shutdown functions
797
    if (is_array($GLOBALS['_PEAR_shutdown_funcs']) AND !empty($GLOBALS['_PEAR_shutdown_funcs'])) {
798
        foreach ($GLOBALS['_PEAR_shutdown_funcs'] as $value) {
799
            call_user_func_array($value[0], $value[1]);
800
        }
801
    }
802
}
803
 
804
// }}}
805
/**
806
 * Standard PEAR error class for PHP 4
807
 *
808
 * This class is supserseded by {@link PEAR_Exception} in PHP 5
809
 *
810
 * @category   pear
811
 * @package    PEAR
812
 * @author     Stig Bakken <ssb@php.net>
813
 * @author     Tomas V.V. Cox <cox@idecnet.com>
814
 * @author     Gregory Beaver <cellog@php.net>
815
 * @copyright  1997-2006 The PHP Group
816
 * @license    http://www.php.net/license/3_0.txt  PHP License 3.0
817
 * @version    Release: 1.6.1
818
 * @link       http://pear.php.net/manual/en/core.pear.pear-error.php
819
 * @see        PEAR::raiseError(), PEAR::throwError()
820
 * @since      Class available since PHP 4.0.2
821
 */
822
class PEAR_Error
823
{
824
    // {{{ properties
825
 
826
    var $error_message_prefix = '';
827
    var $mode                 = PEAR_ERROR_RETURN;
828
    var $level                = E_USER_NOTICE;
829
    var $code                 = -1;
830
    var $message              = '';
831
    var $userinfo             = '';
832
    var $backtrace            = null;
833
 
834
    // }}}
835
    // {{{ constructor
836
 
837
    /**
838
     * PEAR_Error constructor
839
     *
840
     * @param string $message  message
841
     *
842
     * @param int $code     (optional) error code
843
     *
844
     * @param int $mode     (optional) error mode, one of: PEAR_ERROR_RETURN,
845
     * PEAR_ERROR_PRINT, PEAR_ERROR_DIE, PEAR_ERROR_TRIGGER,
846
     * PEAR_ERROR_CALLBACK or PEAR_ERROR_EXCEPTION
847
     *
848
     * @param mixed $options   (optional) error level, _OR_ in the case of
849
     * PEAR_ERROR_CALLBACK, the callback function or object/method
850
     * tuple.
851
     *
852
     * @param string $userinfo (optional) additional user/debug info
853
     *
854
     * @access public
855
     *
856
     */
857
    function PEAR_Error($message = 'unknown error', $code = null,
858
                        $mode = null, $options = null, $userinfo = null)
859
    {
860
        if ($mode === null) {
861
            $mode = PEAR_ERROR_RETURN;
862
        }
863
        $this->message   = $message;
864
        $this->code      = $code;
865
        $this->mode      = $mode;
866
        $this->userinfo  = $userinfo;
867
        if (!PEAR::getStaticProperty('PEAR_Error', 'skiptrace')) {
868
            $this->backtrace = debug_backtrace();
869
            if (isset($this->backtrace[0]) && isset($this->backtrace[0]['object'])) {
870
                unset($this->backtrace[0]['object']);
871
            }
872
        }
873
        if ($mode & PEAR_ERROR_CALLBACK) {
874
            $this->level = E_USER_NOTICE;
875
            $this->callback = $options;
876
        } else {
877
            if ($options === null) {
878
                $options = E_USER_NOTICE;
879
            }
880
            $this->level = $options;
881
            $this->callback = null;
882
        }
883
        if ($this->mode & PEAR_ERROR_PRINT) {
884
            if (is_null($options) || is_int($options)) {
885
                $format = "%s";
886
            } else {
887
                $format = $options;
888
            }
889
            printf($format, $this->getMessage());
890
        }
891
        if ($this->mode & PEAR_ERROR_TRIGGER) {
892
            trigger_error($this->getMessage(), $this->level);
893
        }
894
        if ($this->mode & PEAR_ERROR_DIE) {
895
            $msg = $this->getMessage();
896
            if (is_null($options) || is_int($options)) {
897
                $format = "%s";
898
                if (substr($msg, -1) != "\n") {
899
                    $msg .= "\n";
900
                }
901
            } else {
902
                $format = $options;
903
            }
904
            die(sprintf($format, $msg));
905
        }
906
        if ($this->mode & PEAR_ERROR_CALLBACK) {
907
            if (is_callable($this->callback)) {
908
                call_user_func($this->callback, $this);
909
            }
910
        }
911
        if ($this->mode & PEAR_ERROR_EXCEPTION) {
912
            trigger_error("PEAR_ERROR_EXCEPTION is obsolete, use class PEAR_Exception for exceptions", E_USER_WARNING);
913
            eval('$e = new Exception($this->message, $this->code);throw($e);');
914
        }
915
    }
916
 
917
    // }}}
918
    // {{{ getMode()
919
 
920
    /**
921
     * Get the error mode from an error object.
922
     *
923
     * @return int error mode
924
     * @access public
925
     */
926
    function getMode() {
927
        return $this->mode;
928
    }
929
 
930
    // }}}
931
    // {{{ getCallback()
932
 
933
    /**
934
     * Get the callback function/method from an error object.
935
     *
936
     * @return mixed callback function or object/method array
937
     * @access public
938
     */
939
    function getCallback() {
940
        return $this->callback;
941
    }
942
 
943
    // }}}
944
    // {{{ getMessage()
945
 
946
 
947
    /**
948
     * Get the error message from an error object.
949
     *
950
     * @return  string  full error message
951
     * @access public
952
     */
953
    function getMessage()
954
    {
955
        return ($this->error_message_prefix . $this->message);
956
    }
957
 
958
 
959
    // }}}
960
    // {{{ getCode()
961
 
962
    /**
963
     * Get error code from an error object
964
     *
965
     * @return int error code
966
     * @access public
967
     */
968
     function getCode()
969
     {
970
        return $this->code;
971
     }
972
 
973
    // }}}
974
    // {{{ getType()
975
 
976
    /**
977
     * Get the name of this error/exception.
978
     *
979
     * @return string error/exception name (type)
980
     * @access public
981
     */
982
    function getType()
983
    {
984
        return get_class($this);
985
    }
986
 
987
    // }}}
988
    // {{{ getUserInfo()
989
 
990
    /**
991
     * Get additional user-supplied information.
992
     *
993
     * @return string user-supplied information
994
     * @access public
995
     */
996
    function getUserInfo()
997
    {
998
        return $this->userinfo;
999
    }
1000
 
1001
    // }}}
1002
    // {{{ getDebugInfo()
1003
 
1004
    /**
1005
     * Get additional debug information supplied by the application.
1006
     *
1007
     * @return string debug information
1008
     * @access public
1009
     */
1010
    function getDebugInfo()
1011
    {
1012
        return $this->getUserInfo();
1013
    }
1014
 
1015
    // }}}
1016
    // {{{ getBacktrace()
1017
 
1018
    /**
1019
     * Get the call backtrace from where the error was generated.
1020
     * Supported with PHP 4.3.0 or newer.
1021
     *
1022
     * @param int $frame (optional) what frame to fetch
1023
     * @return array Backtrace, or NULL if not available.
1024
     * @access public
1025
     */
1026
    function getBacktrace($frame = null)
1027
    {
1028
        if (defined('PEAR_IGNORE_BACKTRACE')) {
1029
            return null;
1030
        }
1031
        if ($frame === null) {
1032
            return $this->backtrace;
1033
        }
1034
        return $this->backtrace[$frame];
1035
    }
1036
 
1037
    // }}}
1038
    // {{{ addUserInfo()
1039
 
1040
    function addUserInfo($info)
1041
    {
1042
        if (empty($this->userinfo)) {
1043
            $this->userinfo = $info;
1044
        } else {
1045
            $this->userinfo .= " ** $info";
1046
        }
1047
    }
1048
 
1049
    // }}}
1050
    // {{{ toString()
1051
 
1052
    /**
1053
     * Make a string representation of this object.
1054
     *
1055
     * @return string a string with an object summary
1056
     * @access public
1057
     */
1058
    function toString() {
1059
        $modes = array();
1060
        $levels = array(E_USER_NOTICE  => 'notice',
1061
                        E_USER_WARNING => 'warning',
1062
                        E_USER_ERROR   => 'error');
1063
        if ($this->mode & PEAR_ERROR_CALLBACK) {
1064
            if (is_array($this->callback)) {
1065
                $callback = (is_object($this->callback[0]) ?
1066
                    strtolower(get_class($this->callback[0])) :
1067
                    $this->callback[0]) . '::' .
1068
                    $this->callback[1];
1069
            } else {
1070
                $callback = $this->callback;
1071
            }
1072
            return sprintf('[%s: message="%s" code=%d mode=callback '.
1073
                           'callback=%s prefix="%s" info="%s"]',
1074
                           strtolower(get_class($this)), $this->message, $this->code,
1075
                           $callback, $this->error_message_prefix,
1076
                           $this->userinfo);
1077
        }
1078
        if ($this->mode & PEAR_ERROR_PRINT) {
1079
            $modes[] = 'print';
1080
        }
1081
        if ($this->mode & PEAR_ERROR_TRIGGER) {
1082
            $modes[] = 'trigger';
1083
        }
1084
        if ($this->mode & PEAR_ERROR_DIE) {
1085
            $modes[] = 'die';
1086
        }
1087
        if ($this->mode & PEAR_ERROR_RETURN) {
1088
            $modes[] = 'return';
1089
        }
1090
        return sprintf('[%s: message="%s" code=%d mode=%s level=%s '.
1091
                       'prefix="%s" info="%s"]',
1092
                       strtolower(get_class($this)), $this->message, $this->code,
1093
                       implode("|", $modes), $levels[$this->level],
1094
                       $this->error_message_prefix,
1095
                       $this->userinfo);
1096
    }
1097
 
1098
    // }}}
1099
}
1100
 
1101
/*
1102
 * Local Variables:
1103
 * mode: php
1104
 * tab-width: 4
1105
 * c-basic-offset: 4
1106
 * End:
1107
 */
1108
?>