web开发中前、后端常用数据处理方法整理（集各家之言）

1. [代码][PHP]代码 

-------------------------   前端
/**
 *  前端公共函数方法整理 
 *  @author Weige 
 *  备注： 配合jqury.js 使用
 *  2012-04
 */
 
//获取字符串长度
function getWordSize(str)
{
    if(!str)
        return null;    
    var length = 0;
    var str = str;
    var regDoub = /[^x00-xff]/g;
    var regSingl = /[x00-xff]/g
    var douL = str.match(regDoub);
    var singL = str.match(regSingl)
    if(douL){
        length+=douL.length*2;
    }
    if(singL){
        length+=singL.length;
    }
    length/=2;
    length = Math.ceil(length);
    return length;
}
//祛除前后空格
function trim(str)
{
    return str.replace(/(^\s*)|(\s*$)/g, '');
}
//中文汉字编码判断
function isChinese(str)
{
  var str = str.replace(/(^\s*)|(\s*$)/g,'');
  if (!(/^[\u4E00-\uFA29]*$/.test(str)
          && (!/^[\uE7C7-\uE7F3]*$/.test(str))))
  {
      return false;
  }
  return true;
}
//手机判断
function isMobile(str)
{
 
    if(/^1[345689]\d{9}/.test(str))
      {
          return true;
      }
    return false;
 
}
// oschina
//特殊字符转换
function htmlEncode(str)   
{   
  var s = "";   
  if (str.length == 0) return "";  
  //s = s.replace(/ /g, " ");   
  s = str.replace(/&/g, "&");   
  s = s.replace(//g, "youjiankuohaophpcn");   
  s = s.replace(/\'/g, "'");   
  s = s.replace(/\"/g, """);   
  s = s.replace(/\n/g, "
");   
  return s;   
}   
 
function htmlDecode(str)   
{   
  var s = "";   
  if (str.length == 0) return "";   
  s = str.replace(/youjiankuohaophpcn/g, "&");   
  s = s.replace(/zuojiankuohaophpcn/g, "<");   
  s = s.replace(/youjiankuohaophpcn/g, ">");   
  s = s.replace(/ /g, " ");   
  s = s.replace(/'/g, "\'");   
  s = s.replace(/"/g, "\"");   
  s = s.replace(/
/g, "\n");   
  return s;   
}   
 
 
//使用ajax提交数据
function ajaxPost(the_url,the_param,succ_callback)
{
    $.ajax({
        type    : 'POST',
        cache   : false,
        url     : the_url,
        data    : the_param,
        success : succ_callback
    });
}
 
 
//使用ajax获取数据
 
function ajaxGet(the_url,succ_callback,error_callback)
{
    $.ajax({
        type    : 'GET',
        cache   : true,
        url     : the_url,
        success : succ_callback,
        error   : error_callback
         
    });
}
 
//发送json格式数据
 
function ajaxPostJson(the_url,data_pro,succ_callback,error_callback)
{
    $.ajax({
        async       : false,//同步更新  
        type        : 'post',
        dataType    : 'json',
        data        : data_pro,
        url         : the_url,
        success     : succ_callback,
        error       : error_callback
        });
}
function real_len(name) 
{    
    return (name.replace(/[^\x00-\xff]/g,"**").length);    
}
 
function is_email(email)
{
    var reg=/^\s*([A-Za-z0-9_-]+(\.\w+)*@(\w+\.)+\w{2,3})\s*$/;
    return reg.test(email);
}
function is_number(name)
{
    var reg = /^\d+$/g;    
   return reg.test(name);    
}
function is_pwd(name)
{
     var reg = /^[A-Za-z@0-9_-]+$/g;    
  return reg.test(name);    
         
}
 
---------------------------------后端
 
 
= 0; $t-- ) 
         {
            $a      = floor( $id / pow( $base, $t ) );
            $out    = $out . substr( $index, $a, 1 );
            $id     = $id - ( $a * pow( $base, $t ) );
         }
       return $out;
    }
    /** 
     * 短链接密钥
     * */
    function url_key($url,$key="wei爱微博") 
    {
        $x      = sprintf("%u", crc32($key.$url)); 
        $show   = ''; 
         while($x> 0) 
         { 
             $s = $x% 62; 
             if($s> 35)
             $s = chr($s+61);             
             elseif($s> 9 && $s<=35)
             $s = chr($s+ 55); 
             $show.= $s; 
            $x  = floor($x/62); 
         } 
        return $show;     
    }
    /**
     * 标签key
     * */
    function tag_key($tag,$key="wei爱话题")
    {
        $tag = str_replace(" ", "", $tag);
        $tag.= $key;
        $hash = md5($tag);
        $hash = $hash[0] | ($hash[1] <<8 ) | ($hash[2] <<16) | ($hash[3] <<24) | ($hash[4] <<32) | ($hash[5] <<40) | ($hash[6] <<48) | ($hash[7] <<56);
        return $hash % 99999999;
     
    }
     
    /**
     * 过滤非法标签
     * */
    function strip_selected_tags($str,$disallowable="