之前对ArrayAccess不是很熟悉,如今整顿下下有关ArrayAccess相干的学问,ArrayAccess接口就是供应像接见数组一样接见对象的才能的接口。
接口内容以下:
ArrayAccess { //搜检一个偏移位置是不是存在 abstract public boolean offsetExists ( mixed $offset ); //猎取一个偏移位置的值 abstract public mixed offsetGet ( mixed $offset ); //设置一个偏移位置的值 abstract public void offsetSet ( mixed $offset , mixed $value ); //复位一个偏移位置的值 abstract public void offsetUnset ( mixed $offset ); }
项目中运用,猎取网站设置:
<?php namespace lib; use mpf\core\Di; class config implements \ArrayAccess{ //定义存储数据的数组 protected $configs; public function __construct($configs){ $this->configs = $configs; $configs = \lib\model\Home::getWebConfig(); foreach( $configs as $config ){ if( !isset($this->configs[$config['sc_key']]) ){ $this->configs[$config['sc_key']] = $config['sc_content']; } } } public function get($key){ if( isset($this->configs[$key]) ){ return $this->configs[$key]; }elseif( $key == 'caipiao'){ $this->configs['caipiao'] = \lib\model\Home::getLcs(); return $this->configs[$key]; }elseif( $key == 'user_money' ){ if( isset($_SESSION['uid']) ){ if( $_SESSION['utype'] == 5 ){ $sql = 'select money from inner_user where uid=?'; }else{ $sql = 'select money from user where uid=?'; } $this->configs['user_money'] = \mpf\core\Di::$Di->db->prepare_query($sql,[getUid()])->fetch(\PDO::FETCH_COLUMN); return $this->configs['user_money']; } } } public function offsetExists($index){ return isset($this->configs[$index]); } public function offsetGet($index){ return $this->configs[$index]; } public function offsetSet($index,$val){ $this->configs[$index] = $val; } public function offsetUnset($index){ unset($this->configs[$index]); } }
如许能够运用config对象来直接接见设置信息内容。
设置顺序:
我们能够经由过程ArrayAccess应用设置文件来控制顺序。
1. 在项目更目次下建立一个config目次
2. 在config目次下建立响应的设置文件,比方app.php 和 database.php。文件顺序以下
app.php
<?phpreturn [ 'name' => 'app name', 'version' => 'v1.0.0' ];
database.php
<?php return [ 'mysql' => [ 'host' => 'localhost', 'user' => 'root', 'password' => '12345678' ] ];
3. Config.php完成ArrayAccess
<?php namespace Config; class Config implements \ArrayAccess { private $config = []; private static $instance; private $path; private function __construct() { $this->path = __DIR__."/config/"; } public static function instance() { if (!(self::$instance instanceof Config)) { self::$instance = new Config(); } return self::$instance; } public function offsetExists($offset) { return isset($this->config[$offset]); } public function offsetGet($offset) { if (empty($this->config[$offset])) { $this->config[$offset] = require $this->path.$offset.".php"; } return $this->config[$offset]; } public function offsetSet($offset, $value) { throw new \Exception('不供应设置设置'); } public function offsetUnset($offset) { throw new \Exception('不供应删除设置'); } } $config = Config::instance(); //猎取app.php 文件的 name echo $config['app']['name'].PHP_EOL; //app name //猎取database.php文件mysql的user设置 echo $config['database']['mysql']['user'].PHP_EOL; // root
相干教程:PHP视频教程
以上就是PHP数组式接见-ArrayAccess示例剖析的细致内容,更多请关注ki4网别的相干文章!