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Notice (8): SplFileObject::fwrite() [<a href='https://secure.php.net/splfileobject.fwrite'>splfileobject.fwrite</a>]: Write of 5131 bytes failed with errno=28 No space left on device [CORE/src/Cache/Engine/FileEngine.php, line 141]

Notice: file_put_contents() [function.file-put-contents]: Write of 3152 bytes failed with errno=28 No space left on device in /www/wwwroot/www.adminso.com/vendor/cakephp/cakephp/src/Log/Engine/FileLog.php on line 140
Notice (8): SplFileObject::fwrite() [<a href='https://secure.php.net/splfileobject.fwrite'>splfileobject.fwrite</a>]: Write of 5437 bytes failed with errno=28 No space left on device [CORE/src/Cache/Engine/FileEngine.php, line 141]

Notice: file_put_contents() [function.file-put-contents]: Write of 3152 bytes failed with errno=28 No space left on device in /www/wwwroot/www.adminso.com/vendor/cakephp/cakephp/src/Log/Engine/FileLog.php on line 140
Notice (8): SplFileObject::fwrite() [<a href='https://secure.php.net/splfileobject.fwrite'>splfileobject.fwrite</a>]: Write of 96 bytes failed with errno=28 No space left on device [CORE/src/Cache/Engine/FileEngine.php, line 141]

Notice: file_put_contents() [function.file-put-contents]: Write of 2790 bytes failed with errno=28 No space left on device in /www/wwwroot/www.adminso.com/vendor/cakephp/cakephp/src/Log/Engine/FileLog.php on line 140
Warning (512): long cache was unable to write '47a29c30304d0f6516aae3cc63d296fb' to Cake\Cache\Engine\FileEngine cache [CORE/src/Cache/Cache.php, line 275]

Notice: file_put_contents() [function.file-put-contents]: Write of 2586 bytes failed with errno=28 No space left on device in /www/wwwroot/www.adminso.com/vendor/cakephp/cakephp/src/Log/Engine/FileLog.php on line 140
Notice (8): SplFileObject::fwrite() [<a href='https://secure.php.net/splfileobject.fwrite'>splfileobject.fwrite</a>]: Write of 102 bytes failed with errno=28 No space left on device [CORE/src/Cache/Engine/FileEngine.php, line 141]

Notice: file_put_contents() [function.file-put-contents]: Write of 2791 bytes failed with errno=28 No space left on device in /www/wwwroot/www.adminso.com/vendor/cakephp/cakephp/src/Log/Engine/FileLog.php on line 140
Warning (512): long cache was unable to write '17ef9e30b54457ab18b77d24a60c5751' to Cake\Cache\Engine\FileEngine cache [CORE/src/Cache/Cache.php, line 275]

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Notice (8): unserialize() [<a href='https://secure.php.net/function.unserialize'>function.unserialize</a>]: Error at offset 28661 of 28661 bytes [APP/Controller/NewsController.php, line 5571]

Notice: file_put_contents() [function.file-put-contents]: Write of 2397 bytes failed with errno=28 No space left on device in /www/wwwroot/www.adminso.com/vendor/cakephp/cakephp/src/Log/Engine/FileLog.php on line 140
Notice (8): unserialize() [<a href='https://secure.php.net/function.unserialize'>function.unserialize</a>]: Error at offset 90093 of 90101 bytes [APP/Controller/NewsController.php, line 5571]

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Notice (8): unserialize() [<a href='https://secure.php.net/function.unserialize'>function.unserialize</a>]: Error at offset 94197 of 94197 bytes [APP/Controller/NewsController.php, line 5571]

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php面向对象全攻略 (十七) 自动加载类 - 站长搜索
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php面向对象全攻略 (十七) 自动加载类

PHP 2014-12-11 09:57:04 转载来源: 网络整理/侵权必删

本文为大家讲解了php面向对象全攻略 (十七) 自动加载类,多开发者写面向对象的应用程序时,对每个类的定义建立一个PHP 源文件。一个很大的烦恼是不得不在每个脚本(每个类一个文件)开头写一个长长的包含文件的列表

本文为大家讲解了php面向对象全攻略十七自动加载类,多开发者写面向对象的应用程序时,对每个类的定义建立一个PHP 源文件。一个很大的烦恼是不得不在每个脚本(每个类一个文件)开头写一个长长的包含文件的列表。感兴趣的同学参考下.


自动加载类
很多开发者写面向对象的应用程序时,对每个类的定义建立一个PHP 源文件。一个很大的烦恼是不得不在每个脚本(每个类一个文件)开头写一个长长的包含文件的列表。在软件开发的系统中,不可能把所有的类都写在一个PHP 文件中,当在一个PHP 文件中需要调用另一个文件中声明的类时,就需要通过include 把这个文件引入。不过有的时候,在文件众多的项目中,要一一将所需类的文件都include 进来,是一个很让人头疼的事,所以我们能不能在用到什么类的时候,再把这个类所在的PHP 文件导入呢?这就是我们这里我们要讲的自动加载类。
在PHP5 中,可以定义一个__autoload()函数,它会在试图使用尚未被定义的类时自动调用,通过调用此函数,脚本引擎在PHP 出错失败前有了最后一个机会加载所需的类,__autoload()函数接收的一个参数,就是你想加载的类的类名,所以你做项目时,在组织定义类的文件名时,需要按照一定的规则,最好以类名为中心,也可以加上统一的前缀或后缀形成文件名,比如xxx_classname.php、classname_xxx.php 以及就是classname.php 等等。本例尝试分别从MyClass1.php 和MyClass2.php 文件中加载MyClass1 和MyClass2 类
代码片段


<?php
function __autoload($classname) {
require_once $classname . '.php';
}
//MyClass1类不存在自动调用__autoload()函数,传入参数”MyClass1”
$obj = new MyClass1();
//MyClass2类不存在自动调用__autoload()函数,传入参数”MyClass2”
$obj2 = new MyClass2();
?>

标签: php 面向 对象 全攻略 十七 自动 加载


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