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  1. #1
    Registered User
    Join Date
    Apr 2012
    Location
    Ahmedabad
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    Magento development questions:

    Explain Magento's autoload functionality and how to instantiate classes

  2. #2
    Junior Member
    Join Date
    Apr 2012
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    0
    Add my voice to the request. Just begin to work with Magento and such information will be very useful for me.
    Last edited by bevehinds; 05-02-2012 at 09:40 AM.
    Is there a function of reserve power supply in gsm repeaters in case of power failure. Just read it

    Can I use local tv antenna for getting better signal from my AT700 gsm booster? in my big office.

  3. #3

  4. #4
    Member
    Join Date
    Aug 2012
    Location
    India
    Posts
    78
    I have just visited the given blog link for more information and really there are my guiding light in the dark daunting world of Magento. Most tutorials out there don't really explain why the code snippets work, making it hard to modify them to your needs.

  5. #5
    Registered User
    Join Date
    Jul 2012
    Posts
    186
    Hi,
    i am agree with your answer

  6. #6
    Junior Member
    Join Date
    Apr 2013
    Posts
    2
    As a Drupalmint magento web developers, I have find this code and hope it will be useful.

    00001 <?php
    00002 /**
    00003 * Magento
    00004 *
    00005 * NOTICE OF LICENSE
    00006 *
    00007 * This source file is subject to the Open Software License (OSL 3.0)
    00008 * that is bundled with this package in the file LICENSE.txt.
    00009 * It is also available through the world-wide-web at this URL:
    00010 * http://opensource.org/licenses/osl-3.0.php
    00011 * If you did not receive a copy of the license and are unable to
    00012 * obtain it through the world-wide-web, please send an email
    00013 * to license@magentocommerce.com so we can send you a copy immediately.
    00014 *
    00015 * DISCLAIMER
    00016 *
    00017 * Do not edit or add to this file if you wish to upgrade Magento to newer
    00018 * versions in the future. If you wish to customize Magento for your
    00019 * needs please refer to http://www.magentocommerce.com for more information.
    00020 *
    00021 * @category Varien
    00022 * @package Varien_Autoload
    00023 * @copyright Copyright (c) 2008 Irubin Consulting Inc. DBA Varien (http://www.varien.com)
    00024 * @license http://opensource.org/licenses/osl-3.0.php Open Software License (OSL 3.0)
    00025 */
    00026
    00027 /**
    00028 * Classes source autoload
    00029 */
    00030 class Varien_Autoload
    00031 {
    00032 const SCOPE_FILE_PREFIX = '__';
    00033
    00034 static protected $_instance;
    00035 static protected $_scope = 'default';
    00036
    00037 protected $_isIncludePathDefined= null;
    00038 protected $_collectClasses = false;
    00039 protected $_collectPath = null;
    00040 protected $_arrLoadedClasses = array();
    00041
    00042 /**
    00043 * Class constructor
    00044 */
    00045 public function __construct()
    00046 {
    00047 $this->_isIncludePathDefined = defined('COMPILER_INCLUDE_PATH');
    00048 if (defined('COMPILER_COLLECT_PATH')) {
    00049 $this->_collectClasses = true;
    00050 $this->_collectPath = COMPILER_COLLECT_PATH;
    00051 }
    00052 self::registerScope(self::$_scope);
    00053 }
    00054
    00055 /**
    00056 * Singleton pattern implementation
    00057 *
    00058 * @return Varien_Autoload
    00059 */
    00060 static public function instance()
    00061 {
    00062 if (!self::$_instance) {
    00063 self::$_instance = new Varien_Autoload();
    00064 }
    00065 return self::$_instance;
    00066 }
    00067
    00068 /**
    00069 * Register SPL autoload function
    00070 */
    00071 static public function register()
    00072 {
    00073 spl_autoload_register(array(self::instance(), 'autoload'));
    00074 }
    00075
    00076 /**
    00077 * Load class source code
    00078 *
    00079 * @param string $class
    00080 */
    00081 public function autoload($class)
    00082 {
    00083 if ($this->_collectClasses) {
    00084 $this->_arrLoadedClasses[self::$_scope][] = $class;
    00085 }
    00086 if ($this->_isIncludePathDefined) {
    00087 $classFile = $class;
    00088 } else {
    00089 $classFile = str_replace(' ', DIRECTORY_SEPARATOR, ucwords(str_replace('_', ' ', $class)));
    00090 }
    00091 $classFile.= '.php';
    00092 //echo $classFile;die();
    00093 return include $classFile;
    00094 }
    00095
    00096 /**
    00097 * Register autoload scope
    00098 * This process allow include scope file which can contain classes
    00099 * definition which are used for this scope
    00100 *
    00101 * @param string $code scope code
    00102 */
    00103 static public function registerScope($code)
    00104 {
    00105 self::$_scope = $code;
    00106 @include self::SCOPE_FILE_PREFIX.$code.'.php';
    00107 }
    00108
    00109 /**
    00110 * Get current autoload scope
    00111 *
    00112 * @return string
    00113 */
    00114 static public function getScope()
    00115 {
    00116 return self::$_scope;
    00117 }
    00118
    00119 /**
    00120 * Class destructor
    00121 */
    00122 public function __destruct()
    00123 {
    00124 if ($this->_collectClasses) {
    00125 $this->_saveCollectedStat();
    00126 }
    00127 }
    00128
    00129 /**
    00130 * Save information about used classes per scope with class popularity
    00131 * Class_Nameopularity
    00132 *
    00133 * @return Varien_Autoload
    00134 */
    00135 protected function _saveCollectedStat()
    00136 {
    00137 if (!is_dir($this->_collectPath)) {
    00138 @mkdir($this->_collectPath);
    00139 @chmod($this->_collectPath, 0777);
    00140 }
    00141
    00142 if (!is_writeable($this->_collectPath)) {
    00143 return $this;
    00144 }
    00145
    00146 foreach ($this->_arrLoadedClasses as $scope => $classes) {
    00147 $file = $this->_collectPath.DIRECTORY_SEPARATOR.$scope.'.csv';
    00148 $data = array();
    00149 if (file_exists($file)) {
    00150 $data = explode("\n", file_get_contents($file));
    00151 foreach ($data as $index => $class) {
    00152 $class = explode(':', $class);
    00153 $searchIndex = array_search($class[0], $classes);
    00154 if ($searchIndex !== false) {
    00155 $class[1]+=1;
    00156 unset($classes[$searchIndex]);
    00157 }
    00158 $data[$index] = $class[0].':'.$class[1];
    00159 }
    00160 }
    00161 foreach ($classes as $class) {
    00162 $data[] = $class . ':1';
    00163 }
    00164 file_put_contents($file, implode("\n", $data));
    00165 }
    00166 return $this;
    00167 }
    00168 }

  7. #7
    Registered User
    Join Date
    Jul 2014
    Location
    Washington
    Posts
    8
    Hello,

    Here's the answer you need to know => http://alanstorm.com/magento_class_abstration_autoload

    Hope this would help you out.

    Regards,
    Dennies Bright

  8. #8
    Registered User
    Join Date
    Feb 2014
    Location
    F-335, Phase 8-B, Industrial Area, 160055, Mohali, Punjab, India.
    Posts
    13
    I think google is the best ally of yours, you can search your requirement Wikipedia is the best place where you can get results of all inquiries. Anyways, if you are looking development services we can help you out, before moving on we will explain all the queries that you want.
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  9. #9
    Senior Member
    Join Date
    Apr 2013
    Posts
    126
    This is very useful information. I am also a web developer, but I have never come across something like this I think I have not come to a scenario like this till now.
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