Home  >  Article  >  Backend Development  >  Zend Framework教程之Application用法实例详解_PHP

Zend Framework教程之Application用法实例详解_PHP

WBOY
WBOYOriginal
2016-05-27 10:36:26703browse

本文实例讲述了Zend Framework教程之Application用法。分享给大家供大家参考,具体如下:

Zend_Application是Zend Framework的核心组件。Zend_Application为Zend Framework应用程序提供基本功能,是程序的入口点。它的主要功能有两个:装载配置PHP环境(包括自动加载),并引导应用程序。

通常情况下,通过配置选项配置Zend_Application构造器,但也可以完全使用自定义方法配置。以下是两个使用用例。

Zend_Application配置选项

构造函数:

/**
 * Constructor
 *
 * Initialize application. Potentially initializes include_paths, PHP
 * settings, and bootstrap class.
 *
 * @param string          $environment
 * @param string|array|Zend_Config $options String path to configuration file, or array/Zend_Config of configuration options
 * @throws Zend_Application_Exception When invalid options are provided
 * @return void
 */
public function __construct($environment, $options = null)
{
  $this->_environment = (string) $environment;
  require_once 'Zend/Loader/Autoloader.php';
  $this->_autoloader = Zend_Loader_Autoloader::getInstance();
  if (null !== $options) {
    if (is_string($options)) {
      $options = $this->_loadConfig($options);
    } elseif ($options instanceof Zend_Config) {
      $options = $options->toArray();
    } elseif (!is_array($options)) {
      throw new Zend_Application_Exception('Invalid options provided; must be location of config file, a config object, or an array');
    }
    $this->setOptions($options);
  }
}

Zend_Application配置方法

1.使用配置文件
2.使用配置数组

常见配置选项

Option Description
phpSettings

用于配置php.ini选项,要求是数组,数组的键应该是选项的的key.

includePaths

把附加的路径加入到include_path,要求是数组

autoloaderNamespaces

给Zend_Loader_Autoloader注册附加命名空间,为数组

bootstrap

可以是设置bootstrap引导类的路径的字符串,也可以是数组,数组元素要求为 'path' 和 'class'


注意:

选项名称不区分大小写。

Zend_Application的方法

Method Return Value Parameters Description
__construct(
$environment, 
$options = null)
Void
  • $environment: 必填。 表示当前应用环境的String。

    典型的字符串可能包括 "development", "testing", "qa", or "production",他们必须已经被定义。

    对应于配置文件文件中相关章节。

  • $options可选的,参数类型可能是:

    • String :  指定Zend_Config 文件的配置路径. $environment 用于指定配置文件的哪一个章节

      从1.10开始,可以设置多个配置文件路径,然后会被合并成一个单一的配置文件。

      这样更灵活,便于重用。

      在这种情况下的key是"config",其值是文件路径数组。

      注:可以是路径字符串,或 array("config"=>array("/path1","/path2"[,...]));.

    • Array : 配置应用的关联数组

    • Zend_Config:配置对象的实例

构造函数。 用于初始化配置对象。   实例化Zend_Loader_Autoloader。

通过传递给构造函数选项然后传递给setOptions()方法。

getEnvironment() String N/A

获取环境配置

getAutoloader() Zend_Loader_Autoloader N/A

获取Zend_Loader_Autoloader实例

setOptions(array $options) Zend_Application
  • $options必填,要求是数组

所有选项都存储在引用内部,并多次调用该方法来合并选项。

会根据选项生产对于的setter方法。 

例如,选项“phpSettings”对应setPhpSettings()。 

(选项名称不区分大小写。)

getOptions() Array N/A


hasOption($key) Boolean
  • $key: 判断是发有指定的配置

key不区分大小写。

getOption($key) Mixed
  • $key: 获取指定的配置选项的值

key不区分大小写。如果不存在返回 NULL

setPhpSettings(array $settings, $prefix = '') Zend_Application
  • $settings比填.PHP INI 的配置关联数组.

  • $prefix可选. 为选项添加前缀


setAutoloaderNamespaces(array $namespaces) Zend_Application
  • $namespaces必填

    传递命名空间字符串数组,通过Zend_Loader_Autoloader实例注册


setBootstrap($path, $class = null) Zend_Application
  • $path必填

    可能是Zend_Application_Bootstrap_Bootstrapper实例,

    自举类路径字符串, 

    格式为classname => filename的关联数组,

    或key为“class”和value为“path”的关联数组。

  • $class可选. 如果 $path 是字符串, $class 类名称

getBootstrap() NULL |Zend_Application_Bootstrap_Bootstrapper N/A

获取注册的bootstrap实例.

bootstrap() Void N/A

调用 bootstrap的bootstrap() 引导应用.

run() Void N/A

调用bootstrap的 run()运行应用

配置举例:

默认:

// Create application, bootstrap, and run
$application = new Zend_Application(
  APPLICATION_ENV,
  APPLICATION_PATH . '/configs/application.ini'
);
$application->bootstrap()
      ->run();

源代码

<&#63;php
class Zend_Application
{  /**
   * Constructor
   *
   * Initialize application. Potentially initializes include_paths, PHP
   * settings, and bootstrap class.
   *
   * @param string          $environment
   * @param string|array|Zend_Config $options String path to configuration file, or array/Zend_Config of configuration options
   * @throws Zend_Application_Exception When invalid options are provided
   * @return void
   */
  public function __construct($environment, $options = null)
  {
    $this->_environment = (string) $environment;
    require_once 'Zend/Loader/Autoloader.php';
    $this->_autoloader = Zend_Loader_Autoloader::getInstance();
    if (null !== $options) {
      if (is_string($options)) {
        $options = $this->_loadConfig($options);
      } elseif ($options instanceof Zend_Config) {
        $options = $options->toArray();
      } elseif (!is_array($options)) {
        throw new Zend_Application_Exception('Invalid options provided; must be location of config file, a config object, or an array');
      }
      $this->setOptions($options);
    }
  }
  /**
   * Retrieve current environment
   *
   * @return string
   */
  public function getEnvironment()
  {
    return $this->_environment;
  }
  /**
   * Retrieve autoloader instance
   *
   * @return Zend_Loader_Autoloader
   */
  public function getAutoloader()
  {
    return $this->_autoloader;
  }
  /**
   * Set application options
   *
   * @param array $options
   * @throws Zend_Application_Exception When no bootstrap path is provided
   * @throws Zend_Application_Exception When invalid bootstrap information are provided
   * @return Zend_Application
   */
  public function setOptions(array $options)
  {
    if (!empty($options['config'])) {
      if (is_array($options['config'])) {
        $_options = array();
        foreach ($options['config'] as $tmp) {
          $_options = $this->mergeOptions($_options, $this->_loadConfig($tmp));
        }
        $options = $this->mergeOptions($_options, $options);
      } else {
        $options = $this->mergeOptions($this->_loadConfig($options['config']), $options);
      }
    }
    $this->_options = $options;
    $options = array_change_key_case($options, CASE_LOWER);
    $this->_optionKeys = array_keys($options);
    if (!empty($options['phpsettings'])) {
      $this->setPhpSettings($options['phpsettings']);
    }
    if (!empty($options['includepaths'])) {
      $this->setIncludePaths($options['includepaths']);
    }
    if (!empty($options['autoloadernamespaces'])) {
      $this->setAutoloaderNamespaces($options['autoloadernamespaces']);
    }
    if (!empty($options['autoloaderzfpath'])) {
      $autoloader = $this->getAutoloader();
      if (method_exists($autoloader, 'setZfPath')) {
        $zfPath  = $options['autoloaderzfpath'];
        $zfVersion = !empty($options['autoloaderzfversion'])
              &#63; $options['autoloaderzfversion']
              : 'latest';
        $autoloader->setZfPath($zfPath, $zfVersion);
      }
    }
    if (!empty($options['bootstrap'])) {
      $bootstrap = $options['bootstrap'];
      if (is_string($bootstrap)) {
        $this->setBootstrap($bootstrap);
      } elseif (is_array($bootstrap)) {
        if (empty($bootstrap['path'])) {
          throw new Zend_Application_Exception('No bootstrap path provided');
        }
        $path = $bootstrap['path'];
        $class = null;
        if (!empty($bootstrap['class'])) {
          $class = $bootstrap['class'];
        }
        $this->setBootstrap($path, $class);
      } else {
        throw new Zend_Application_Exception('Invalid bootstrap information provided');
      }
    }
    return $this;
  }
  /**
   * Retrieve application options (for caching)
   *
   * @return array
   */
  public function getOptions()
  {
    return $this->_options;
  }
  /**
   * Is an option present&#63;
   *
   * @param string $key
   * @return bool
   */
  public function hasOption($key)
  {
    return in_array(strtolower($key), $this->_optionKeys);
  }
  /**
   * Retrieve a single option
   *
   * @param string $key
   * @return mixed
   */
  public function getOption($key)
  {
  }
  /**
   * Merge options recursively
   *
   * @param array $array1
   * @param mixed $array2
   * @return array
   */
  public function mergeOptions(array $array1, $array2 = null)
  {
    if (is_array($array2)) {
      foreach ($array2 as $key => $val) {
        if (is_array($array2[$key])) {
          $array1[$key] = (array_key_exists($key, $array1) && is_array($array1[$key]))
                 &#63; $this->mergeOptions($array1[$key], $array2[$key])
                 : $array2[$key];
        } else {
          $array1[$key] = $val;
        }
      }
    }
    return $array1;
  }
  /**
   * Set PHP configuration settings
   *
   * @param array $settings
   * @param string $prefix Key prefix to prepend to array values (used to map . separated INI values)
   * @return Zend_Application
   */
  public function setPhpSettings(array $settings, $prefix = '')
  {
    foreach ($settings as $key => $value) {
      $key = empty($prefix) &#63; $key : $prefix . $key;
      if (is_scalar($value)) {
        ini_set($key, $value);
      } elseif (is_array($value)) {
        $this->setPhpSettings($value, $key . '.');
      }
    }
    return $this;
  }
  /**
   * Set include path
   *
   * @param array $paths
   * @return Zend_Application
   */
  public function setIncludePaths(array $paths)
  {
    $path = implode(PATH_SEPARATOR, $paths);
    set_include_path($path . PATH_SEPARATOR . get_include_path());
    return $this;
  }
  /**
   * Set autoloader namespaces
   *
   * @param array $namespaces
   * @return Zend_Application
   */
  public function setAutoloaderNamespaces(array $namespaces)
  {
    $autoloader = $this->getAutoloader();
    foreach ($namespaces as $namespace) {
      $autoloader->registerNamespace($namespace);
    }
    return $this;
  }
  /**
   * Set bootstrap path/class
   *
   * @param string $path
   * @param string $class
   * @return Zend_Application
   */
  public function setBootstrap($path, $class = null)
  {
    // setOptions() can potentially send a null value; specify default
    // here
    if (null === $class) {
      $class = 'Bootstrap';
    }
    if (!class_exists($class, false)) {
      require_once $path;
      if (!class_exists($class, false)) {
        throw new Zend_Application_Exception('Bootstrap class not found');
      }
    }
    $this->_bootstrap = new $class($this);
    if (!$this->_bootstrap instanceof Zend_Application_Bootstrap_Bootstrapper) {
      throw new Zend_Application_Exception('Bootstrap class does not implement Zend_Application_Bootstrap_Bootstrapper');
    }
    return $this;
  }
  /**
   * Get bootstrap object
   *
   * @return Zend_Application_Bootstrap_BootstrapAbstract
   */
  public function getBootstrap()
  {
    if (null === $this->_bootstrap) {
      $this->_bootstrap = new Zend_Application_Bootstrap_Bootstrap($this);
    }
    return $this->_bootstrap;
  }
  /**
   * Bootstrap application
   *
   * @param null|string|array $resource
   * @return Zend_Application
   */
  public function bootstrap($resource = null)
  {
    $this->getBootstrap()->bootstrap($resource);
    return $this;
  }
  /**
   * Run the application
   *
   * @return void
   */
  public function run()
  {
    $this->getBootstrap()->run();
  }
  /**
   * Load configuration file of options
   *
   * @param string $file
   * @throws Zend_Application_Exception When invalid configuration file is provided
   * @return array
   */
  protected function _loadConfig($file)
  {
    $environment = $this->getEnvironment();
    $suffix   = pathinfo($file, PATHINFO_EXTENSION);
    $suffix   = ($suffix === 'dist')
           &#63; pathinfo(basename($file, ".$suffix"), PATHINFO_EXTENSION)
           : $suffix;
    switch (strtolower($suffix)) {
      case 'ini':
        $config = new Zend_Config_Ini($file, $environment);
        break;
      case 'xml':
        $config = new Zend_Config_Xml($file, $environment);
        break;
      case 'json':
        $config = new Zend_Config_Json($file, $environment);
        break;
      case 'yaml':
      case 'yml':
        $config = new Zend_Config_Yaml($file, $environment);
        break;
      case 'php':
      case 'inc':
        $config = include $file;
        if (!is_array($config)) {
          throw new Zend_Application_Exception('Invalid configuration file provided; PHP file does not return array value');
        }
        return $config;
        break;
      default:
        throw new Zend_Application_Exception('Invalid configuration file provided; unknown config type');
    }
    return $config->toArray();
  }
}

更多关于zend相关内容感兴趣的读者可查看本站专题:《Zend FrameWork框架入门教程》、《php优秀开发框架总结》、《Yii框架入门及常用技巧总结》、《ThinkPHP入门教程》、《php面向对象程序设计入门教程》、《php+mysql数据库操作入门教程》及《php常见数据库操作技巧汇总》

希望本文所述对大家PHP程序设计有所帮助。

Statement:
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn