1，自定义函数
2，spl_autoload_register()
代码如下:
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
首先看自定义函数方式：
代码如下:
<?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(); $b = new bclass(); print_r(get_included_files()); ?>
运行结果如下：
代码如下:
liuyuan@ebuinfo:/var/www/phpgcs/php_autoload$ 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 )
第二种方式：
代码如下:
<?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 后会失效，因为 autoload_func 函数指针已指向 spl_autoload 方法 * 可以通过下面的方法来把 _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; $b = new bclass(); echo eol; ?>
运行结果如下：
代码如下:
liuyuan@ebuinfo:/var/www/phpgcs/php_autoload$ 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
以上就是php自定义函数自动加载autoload机制实例详解的详细内容。