php自定义函数自动加载autoload机制实例详解
程序员文章站
2022-04-21 09:49:59
...
这篇文章主要介绍了php自动加载autoload机制示例,文件结构如下,2种方式实现自动加载,需要的朋友可以参考下
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,更多请关注其它相关文章!