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                <?php  | 
            
                            
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                /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * Console GetoptPlus/Exception  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * All rights reserved.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * Redistribution and use in source and binary forms, with or without modification,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * are permitted provided that the following conditions are met:  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * + Redistributions of source code must retain the above copyright notice,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * this list of conditions and the following disclaimer.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * + Redistributions in binary form must reproduce the above copyright notice,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * this list of conditions and the following disclaimer in the documentation and/or  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * other materials provided with the distribution.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * + The names of its contributors may not be used to endorse or promote  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * products derived from this software without specific prior written permission.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @category  Console  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @package   Console_GetoptPlus  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @author    Michel Corne <[email protected]>  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @copyright 2008 Michel Corne  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @license   http://www.opensource.org/licenses/bsd-license.php The BSD License  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @version   SVN: $Id: Exception.php 47 2008-01-10 11:03:38Z mcorne $  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @link      http://pear.php.net/package/Console_GetoptPlus  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                require_once 'PEAR/Exception.php';  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * Handling of error messages and exceptions.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @category  Console  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @package   Console_GetoptPlus  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @author    Michel Corne <[email protected]>  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @copyright 2008 Michel Corne  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @license   http://www.opensource.org/licenses/bsd-license.php The BSD License  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @version   Release: @package_version@  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @link      http://pear.php.net/package/Console_GetoptPlus  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * @see       PEAR_Exception  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                 */  | 
            
            
                                                                        
                            
            
                                    
            
            
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                class Console_GetoptPlus_Exception extends PEAR_Exception  | 
            
                            
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                { | 
            
            
                                                                        
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     * The error messages  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     * @var    array  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     * @access private  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    private $messages = array(// /  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        'unknow' => array(1, 'Console_Getopt: unknown error ID (%s)'),  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        // original Console_Getopt error messages  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        'ambigous' => array(10, 'Console_Getopt: option --%s is ambiguous'),  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        'mandatory' => array(11, 'Console_Getopt: option requires an argument --%s'),  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        'noargument' => array(12, 'Console_Getopt: option --%s doesn\'t allow an argument'),  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        'noargs' => array(13, 'Console_Getopt: Could not read cmd args (register_argc_argv=Off?)'),  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        'unrecognized' => array(14, 'Console_Getopt: unrecognized option --%s'),  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        // additional Console_GetoptPlus_Getopt error messages  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        'duplicate' => array(20, 'Console_Getopt: duplicate option name definition --%s'),  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        'invalid' => array(21, 'Console_Getopt: invalid long option definition %s'),  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        'string' => array(22, 'Console_Getopt: short options definition must be a string'),  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        'syntax' => array(23, 'Console_Getopt: short options definition syntax error %s'),  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        // additional Console_GetoptPlus error messages  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        'missing' => array(30, 'Console_GetoptPlus: unknown option name #%s'),  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        'type' => array(31, 'Console_GetoptPlus: unknown option type %s'),  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        'convert' => array(32, 'Console_GetoptPlus: wrong option name conversion %s'),  | 
            
            
                                                                        
                            
            
                                    
            
            
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                        );  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     * Triggers the exception.  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     *  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     * @param  mixed  $exception the exception ID and optional message part,  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     *                           e.g. "string" or array("invalid", '--foo') | 
            
            
                                                                        
                            
            
                                    
            
            
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                     * @return void  | 
            
                            
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                     * @access public  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public function __construct($exception)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        // extracts the exception ID and message parameters  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        settype($exception, 'array');  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $id = current($exception);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        // resets the exception ID if no corresponding message (programmatic error!)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        isset($this->messages[$id]) or $exception = array(null, $id) and $id = 'unknow';  | 
            
                            
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                        // extracts the exception code and pattern  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        list($code, $format) = $this->messages[$id];  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $exception[0] = $format;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        // completes the message, throws the exception  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $message = call_user_func_array('sprintf', $exception); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        parent::__construct($message, $code);  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                    }  | 
            
            
                                                                        
                            
            
                                    
            
            
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                }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                ?>  | 
            
                            
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The PSR-1: Basic Coding Standard recommends that a file should either introduce new symbols, that is classes, functions, constants or similar, or have side effects. Side effects are anything that executes logic, like for example printing output, changing ini settings or writing to a file.
The idea behind this recommendation is that merely auto-loading a class should not change the state of an application. It also promotes a cleaner style of programming and makes your code less prone to errors, because the logic is not spread out all over the place.
To learn more about the PSR-1, please see the PHP-FIG site on the PSR-1.