Detailed explanation of Application usage examples of Zend Framework tutorial, zendframework_PHP tutorial

Detailed explanation of application usage examples of Zend Framework tutorial, zendframework

This article explains the application usage of Zend Framework tutorial with examples. Share it with everyone for your reference, the details are as follows:

Zend_Application is the core component of Zend Framework. Zend_Application provides basic functionality for Zend Framework applications and is the entry point of the program. Its main functions are two: loading and configuring the PHP environment (including automatic loading), and booting the application.

Typically, the Zend_Application constructor is configured via configuration options, but it can also be configured entirely using a custom method. Below are two use cases.

Zend_Application configuration options

Constructor:

/**
 * 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 configuration method

1. Use configuration file
2. Use configuration array

Common configuration options

Option

Description

phpSettings

Used to configure php.ini options, required It is an array, and the key of the array should be the key of the option.

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'

includePaths

Add additional paths to include_path, required is an array

autoloaderNamespaces

Register an additional namespace to Zend_Loader_Autoloader as an array

bootstrap

You can set the path of the bootstrap guide class String, or array. The array elements are required to be 'path' and 'class'

Note:

Option names are not case-sensitive.

Zend_Application method

Method	Return Value	Parameters	Description
__construct( $environment, $options = null)	Void	$environment: Required. A String representing the current application environment. Typical strings may include "development", "testing", "qa", or "production", which must already be defined. Corresponds to the relevant section in the configuration file. $options: Optional, the parameter type may be : String : Specifies the configuration path of the Zend_Config file. $environment is used to specify which section of the configuration file Starting from 1.10, multiple configuration file paths can be set, which will then be merged into a single configuration file. This is more flexible and easier to reuse. The key in this case is "config" and its value is an array of file paths. Note: It can be a path string, or array("config"=>array("/path1","/path2"[,...]));. Array : Configure the application’s associative array Zend_Config: Instance of configuration object	Constructor. Used to initialize configuration objects. Instantiate Zend_Loader_Autoloader. By passing options to the constructor and then to the setOptions() method.
getEnvironment()	String	N/A	Get environment configuration
getAutoloader()	Zend_Loader_Autoloader	N/A	Get Zend_Loader_Autoloader instance
setOptions(array $options)	Zend_Application	$options: Required, the requirement is an array	All options are stored inside a reference and the method is called multiple times to merge the options. The setter method will be generated according to the options. For example, the option "phpSettings" corresponds to setPhpSettings(). (Option names are not case sensitive.)
getOptions()	Array	N/A
hasOption($key)	Boolean	$key: It is judged that the specified configuration is issued	key is not case sensitive.
getOption($key)	Mixed	$key: Get the value of the specified configuration option	key is not case sensitive. If it does not exist, return NULL
setPhpSettings(array $settings, $prefix = '')	Zend_Application	$settings: Compare .PHP Configuration association array of INI . $prefix: Optional. Add prefix to the option
setAutoloaderNamespaces(array $namespaces)	Zend_Application	$namespaces: Required. Pass an array of namespace strings, registered via the Zend_Loader_Autoloader instance
setBootstrap($path, $class = null)	Zend_Application	$path: Required. Probably a Zend_Application_Bootstrap_Bootstrapper instance, Bootstrap class path string, Associative array in the format classname => filename, Or an associative array with key "class" and value "path". $class: Optional. If $path is a string, $class is the class name
getBootstrap()	NULL |Zend_Application_Bootstrap_Bootstrapper	N/A	Get the registered bootstrap instance.
bootstrap()	Void	N/A	Call bootstrap's bootstrap() to boot the application.
run()	Void	N/A	Call bootstrap's run() to run the application

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();
  }
}

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