如何在旧的PHP系统中使用PHP 5.3之后的库
这篇文章主要介绍了如何在旧的PHP系统中使用PHP 5.3之后的库,需要的朋友可以参考下
所谓老的系统,是指没有使用PHP 5.3以上命名空间(namespace)特性编码的系统。
但是,只要你的系统运行在 PHP 5.3及以上的环境,在你的老系统中,是可以使用这些基于新特性如命名空间编码的库或代码的。
以前只是有洁癖不用而已。
比如,我是个工具控,想让所用的禅道系统也像那些国际化开源 Issue 项目一样有一套标准开放的 API - 禅道本身是有套 html、json 自适配模式可以当接口用的,可以用于其他客户端或系统集成。这几天在尝试编写的用于兼容 Redmine REST 风格接口的禅道 PMS API,就有意识的用了这种混合的写法。
由于要兼容 Redmine 的 REST 风格,首先选用了 Slim 这个微服务框架,毫无疑问,它是要求运行环境>5.3的,但我总得复用禅道已有的代码,这样效率才高。
原理很简单,就是一根反斜杠,或者两根。
先用composer 初始化了slim 库。
重点部位的代码:
入口文件 index.php
require __DIR__ . '/vendor/autoload.php'; require __DIR__ . '/inc/zentao/nb/Autoloader.php'; \zentao\nb\Autoloader::register(); $app = \zentao\core\Application::app(dirname(ZTNB_ROOT)); //禅道的router $slim = new \Slim\Slim(); $routes = require __DIR__ . '/data/config/routes.php'; foreach ($routes as $method => $_routes) { if ($_routes) { foreach ($_routes as $rule => $map) { $slim->$method($rule, '\\zentao\\nb\\resource\\' . $map); } } } $slim->run();
\zentao\core\Application 是独立封装的兼容禅道原来运行环境的类,由禅道中的 framework/router.class.php 改造而来,主要用于加载禅道中的相关资源如配置文件、模型等。精华应该在这里面,主要是加了一些“\”来让微服务中能跑起来禅道运来的运行环境,并作为一个命名空间的桥梁可以在新的代码中调用。
再看看资源类的父类 \zentao\nb\Resource,片段
app->loadConfig($moduleName, false); $this->app->loadLang($moduleName); $this->dao = new dao(); return false; } $modelClass = class_exists('ext' . $moduleName . 'model') ? 'ext' . $moduleName . 'model' : $moduleName . 'model'; $modelClass = '\\' . $modelClass; if (!class_exists($modelClass)) $this->app->triggerError(" The model $modelClass not found", __FILE__, __LINE__, $exit = true); $this->$moduleName = new $modelClass(); $this->dao = $this->$moduleName->dao; return $this->$moduleName; }
这样可以在资源类中调用禅道的 model 类。
还有另外一种用法,加载语言包:
loadLang('bug')->bug->typeList; $issue_categories = array(); foreach ($types as $key => $name) { $issue_categories[] = array('id' => BugType::getIdByInterId($key), 'name' => $name); } echo json_encode(array('issue_categories' => $issue_categories)); } /** * 根据项目来取其中定义的分类 * @param int $projectId * @param string $format */ public function fetchAllByProjectId($projectId, $format = 'json') { $model = $this->loadModel('project'); $project = $model->getById($projectId);//TODO 支持按项目代号查找 if (!$project) { $this->responseNotExixted(); } global $app; $types = $app->loadLang('bug')->bug->typeList; $issue_categories = array(); foreach ($types as $key => $name) { $issue_categories[] = array('id' => BugType::getIdByInterId($key), 'project' => array('id' => $projectId, 'name' => $project->name), 'name' => $name); } echo json_encode(array( 'issue_categories' => $issue_categories, 'total_count' => 2 )); } }
基本项目结构如下:
项目只是初步成型,尚未完成。
这是在 NB 中的任务列表。
这是在 NB 中的任务详情。
以上就是告诉大家如何在旧的PHP系统中使用PHP 5.3之后的库,希望对大家的学习有所帮助。

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