這篇文章主要介紹了php自動加載autoload機制示例，文件結構如下，2種方式實現自動加載,需要的朋友可以參考下
1，自定義函數 2，spl_autoload_register() 代碼如下: liuyuan@ebuinfo:/var/www/phpgcs/php_autoload$ ll ./* -rw-rw-r-- 1 liuyuan liuyuan 800 Feb 19 11:39 ./func_autoload.php -rw-rw-r-- 1 liuyuan liuyuan 906 Feb 19 11:28 ./spl_autoload.php ./include: total 16 drwxrwxr-x 2 liuyuan liuyuan 4096 Feb 19 11:42 ./ drwxrwxr-x 3 liuyuan liuyuan 4096 Feb 19 11:43 ../ -rw-rw-r-- 1 liuyuan liuyuan 142 Feb 19 11:42 aClass.php -rw-rw-r-- 1 liuyuan liuyuan 143 Feb 19 11:42 bClass.php 首先看自定義函數方式： 代碼如下: <?php define('EOL', (PHP_SAPI == 'cli') ? PHP_EOL : '</ br>'); print_r(get_included_files()); echo EOL; print get_include_path(); echo EOL; //set_include_path(get_include_path().PATH_SEPARATOR.'/var/www/ly_php/php_spl/include/'); //set_include_path(dirname(__FILE__).'/include'); //set_include_path(dirname(__FILE__).'/include/'); function __autoload($className){ $filename = './include/'.$className.'.php'; //$filename = './include/'.$className.'.php'; //$filename = '/var/www/ly_php/php_spl/include/'.$className.'.php'; if(file_exists($filename)){ include_once $filename; }else{ exit('no file'); } } $a = new aClass(); $b = new bClass(); print_r(get_included_files()); ?> 運行結果如下： 代碼如下: liuyuan@ebuinfo:/var/www/phpgcs/php_autoload$ php func_autoload.php Array ( [0] => /var/www/phpgcs/php_autoload/func_autoload.php ) .:/usr/share/php:/usr/share/pear aClass is loaded bClass is loaded Array ( [0] => /var/www/phpgcs/php_autoload/func_autoload.php [1] => /var/www/phpgcs/php_autoload/include/aClass.php [2] => /var/www/phpgcs/php_autoload/include/bClass.php ) 第二種方式： 代碼如下: <?php class myLoader{ public static function autoload($className){ $filename = './include/'.$className.'.php'; if(file_exists($filename)){ include_once $filename; }else{ exit('no file'); } } } define('EOL', (PHP_SAPI == 'cli') ? PHP_EOL : '<br />'); spl_autoload_register(array('myLoader', 'autoload')); /** *__autoload 方法在 spl_autoload_register 後會失效，因為 autoload_func 函數指針已指向 spl_autoload 方法 * 可以通過下面的方法來把 _autoload 方法加入 autoload_functions list */ //spl_autoload_register( '__autoload' ); error_reporting(E_ALL^E_NOTICE^E_WARNING^E_ERROR); error_reporting(E_NOTICE | E_WARNING ); $a = new aClass(); print_r(get_included_files()); echo EOL; $b = new bClass(); echo EOL; ?> 運行結果如下： 代碼如下: liuyuan@ebuinfo:/var/www/phpgcs/php_autoload$ php spl_autoload.php aClass is loaded Array ( [0] => /var/www/phpgcs/php_autoload/spl_autoload.php [1] => /var/www/phpgcs/php_autoload/include/aClass.php ) bClass is loaded
