php 递归json的类代码

<?php
/**
 * PHP获取路径或目录实现
 * @link http://www.111cn.net
 */
 
//魔术变量，获取当前文件的绝对路径
echo "__FILE__:  ========>  ".__FILE__; 
echo '<br/>';
 
//魔术变量，获取当前脚本的目录
echo "__DIR__:  ========>  ".__DIR__;
echo '<br/>';
 
//dirname返回路径的目录部分,dirname(__FILE__)相当于__DIR__
echo "dirname(__FILE__):  ========>  ".dirname(__FILE__);
echo '<br/>';
 
//$_SERVER['PHP_SELF']和$_SERVER['SCRIPT_NAME']的结果一般相同，他们都是获取当前脚本的文件名
//只有当php以cgi方式运行时有区别，但是现在几乎找不到以cgi方式运行php了
echo '$_SERVER["PHP_SELF"]:  ========>  '.$_SERVER['PHP_SELF'];
echo '<br/>';
 
echo '$_SERVER["SCRIPT_NAME"]:  ========>  '.$_SERVER['SCRIPT_NAME'];
echo '<br/>';
 
//当前执行脚本的绝对路径。记住，在CLI方式运行php是获取不到的
echo '$_SERVER["SCRIPT_FILENAME"]:  ========>  '.$_SERVER['SCRIPT_FILENAME'];
echo '<br/>';
 
//当前运行脚本所在的文档根目录。在服务器配置文件中定义。
echo '$_SERVER["DOCUMENT_ROOT"]:  ========>  '.$_SERVER['DOCUMENT_ROOT'];
echo '<br>';
 
//getcwd()返回当前工作目录
echo "getcwd():  ========>  ".getcwd();
echo '<br>';
 
echo '<br>';
echo "php教程(www.111cn.net)整理";

if (defined('ENVIRONMENT'))
{
 switch (ENVIRONMENT)
 {
  case 'development':
   error_reporting(E_ALL);
  break;
 
  case 'testing':
  case 'production':
   error_reporting(0);
  break;
 
  default:
   exit('The application environment is not set correctly.');
 }
}

//判断moblie
function is_mobile()
{
    $_SERVER['ALL_HTTP'] = isset($_SERVER['ALL_HTTP']) ? $_SERVER['ALL_HTTP'] : '';
 
    $mobile_browser = '0';
 
    if(preg_match('/(up.browser|up.link|mmp|symbian|smartphone|midp|wap|phone|iphone|ipad|ipod|android|xoom|ios)/i', strtolower($_SERVER['HTTP_USER_AGENT'])))
        $mobile_browser++;
 
    if((isset($_SERVER['HTTP_ACCEPT'])) and (strpos(strtolower($_SERVER['HTTP_ACCEPT']),'application/vnd.wap.xhtml+xml') !== false))
        $mobile_browser++;
 
    if(isset($_SERVER['HTTP_X_WAP_PROFILE']))
        $mobile_browser++;
 
    if(isset($_SERVER['HTTP_PROFILE']))
        $mobile_browser++;
 
    $mobile_ua = strtolower(substr($_SERVER['HTTP_USER_AGENT'],0,4));
    $mobile_agents = array(
                        'w3c ','acs-','alav','alca','amoi','audi','avan','benq','bird','blac',
                        'blaz','brew','cell','cldc','cmd-','dang','doco','eric','hipt','inno',
                        'ipaq','java','jigs','kddi','keji','leno','lg-c','lg-d','lg-g','lge-',
                        'maui','maxo','midp','mits','mmef','mobi','mot-','moto','mwbp','nec-',
                        'newt','noki','oper','palm','pana','pant','phil','play','port','prox',
                        'qwap','sage','sams','sany','sch-','sec-','send','seri','sgh-','shar',
                        'sie-','siem','smal','smar','sony','sph-','symb','t-mo','teli','tim-',
                        'tosh','tsm-','upg1','upsi','vk-v','voda','wap-','wapa','wapi','wapp',
                        'wapr','webc','winw','winw','xda','xda-'
                        );
 
    if(in_array($mobile_ua, $mobile_agents))
        $mobile_browser++;
 
    if(strpos(strtolower($_SERVER['ALL_HTTP']), 'operamini') !== false)
        $mobile_browser++;
       www.111cn.net
    // Pre-final check to reset everything if the user is on Windows
    if(strpos(strtolower($_SERVER['HTTP_USER_AGENT']), 'windows') !== false)
        $mobile_browser=0;
 
    // But WP7 is also Windows, with a slightly different characteristic
    if(strpos(strtolower($_SERVER['HTTP_USER_AGENT']), 'windows phone') !== false)
        $mobile_browser++;
 
    if($mobile_browser>0)
        return true;
    else
        return false;
}

<?php
function get_keywords_str($content='')
{
require('./phpanalysis.class.php');
$pa = new PhpAnalysis('utf-8', 'utf-8', false);
$pa->LoadDict();//载入
$pa->SetSource($content);//将要分开的内容传入
$pa->StartAnalysis(false);
$tags = $pa->GetFinallyResult(',',6);//分词样式是以逗号分开/分词长度
return $tags; www.111cn.net
}
$str="李世民是唐朝的第二任皇帝";
echo "分词前:".$str."<br/>";
echo "分词后:".get_keywords_str($str);
?>