some functions

gistfile1.php

-------------------------   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, "&lt;");   
  s = s.replace(/>/g, "&gt;");   
  s = s.replace(/\'/g, "&#39;");   
  s = s.replace(/\"/g, "&quot;");   
  s = s.replace(/\n/g, "<br>");   
  return s;   
}   

function htmlDecode(str)   
{   
  var s = "";   
  if (str.length == 0) return "";   
  s = str.replace(/&gt;/g, "&");   
  s = s.replace(/&lt;/g, "<");   
  s = s.replace(/&gt;/g, ">");   
  s = s.replace(/&nbsp;/g, " ");   
  s = s.replace(/&#39;/g, "\'");   
  s = s.replace(/&quot;/g, "\"");   
  s = s.replace(/<br>/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


<?php


	/**
	 * Weige
	 * 2012-05
	 * */
	
	/**
	 * 唯一名字
	 * */
    function get_unique_name($srand_id=0) 
	{
		$id		= $srand_id?$srand_id:mt_rand(0,99999999);
		$index	= 'z6OmlGsC9xqLPpN7iw8UDAb4HIBXfgEjJnrKZSeuV2Rt3yFcMWhakQT1oY5v0d';
		$base	= 62;
		$out	= "";
		 for ( $t = floor( log10( $id ) / log10( $base ) ); $t >= 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="<script><iframe><style><link>")
	{
		$disallowable	= trim(str_replace(array(">","<"),array("","|"),$disallowable),'|');
		$str			= str_replace(array('&lt;', '&gt;'),array('<', '>'),$str);
		$str			= preg_replace("~<({$disallowable})[^>]*>(.*?<\s*\/(\\1)[^>]*>)?~is",'$2',$str);
		
		return $str;
	}
	/**
	 * 替换或转义标签
	 * */
	function convert_tags($str)
	{

		if($str)
	//	$str = str_replace(array('&','<', '>',"'",'"'),array('&amp;','&lt;', '&gt;','&#039;','&quot;'),$str);
    	$str = str_replace(array('<', '>',"'",'"'),array('&lt;', '&gt;','&#039;','&quot;'),$str);
	 	return $str;
	}
	

//    function jstrpos($haystack, $needle, $offset = null)
//    {
//    		$needle	 = trim($needle);
// 		$jstrpos = false;
// 		if(function_exists('mb_strpos'))
// 		{
// 			$jstrpos = mb_strpos($haystack, $needle, $offset, self::$charset);
// 		}
// 		elseif(function_exists('strpos'))
// 		{
// 			$jstrpos = strpos($haystack, $needle, $offset);
// 		}
// 		return $jstrpos;
//    }
   /**
	 * 检查是否为一个http开头并带有.com的url地址
	 **/
	function is_http($url)
	{
		if(filter_var($url, FILTER_VALIDATE_URL))
		return true;return false;
	}
	/**
	 * 发送一个http请求
	 * @param  $url    请求链接
	 * @param  $method 请求方式
	 * @param array $vars 请求参数
	 * @param  $time_out  请求过期时间
	 * @return JsonObj
	 */
	function get_curl($url, array $vars=array(), $method = 'post')
	{
		$method = strtolower($method);
		if($method == 'get' && !empty($vars))
		{
			if(strpos($url, '?') === false)
				$url = $url . '?' . http_build_query($vars);
			else
				$url = $url . '&' . http_build_query($vars);
		}
		
		$ch = curl_init();
		curl_setopt($ch, CURLOPT_URL, $url);
		curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 5);
		curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
		curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
	
		if ($method == 'post') 
		{
			curl_setopt($ch, CURLOPT_POST, 1);
			curl_setopt($ch, CURLOPT_POSTFIELDS, $vars);
		}	
		$result = curl_exec($ch);
		if(!curl_errno($ch))
		{
			$result = trim($result);
		}
		else 
		{
			$result = '[error：1]';
		}
		
		curl_close($ch);
		return $result;
        
	}
	
	/**
	 * 获取客户端ip
	 * */
    function getIp()
	{
		if (isset($_SERVER['HTTP_CLIENT_IP']))
		{
			return $_SERVER['HTTP_CLIENT_IP'];
		}
		else if (isset($_SERVER['HTTP_X_FORWARDED_FOR']))
		{
			return $_SERVER['HTTP_X_FORWARDED_FOR'];
		}
		else if (isset($_SERVER['REMOTE_ADDR']))
		{
			return $_SERVER['REMOTE_ADDR'];
		}
		return '0.0.0';
	}
	/**
	 * 图片大小验证器
	 * $_FILES['file']数组
	 * 
	 * 只支持 jpg png gif 格式 默认5M
	 * */
	function check_img($file,$limitSize=5242880)
	{
		$type_maping = array(1=>'image/gif', 2=>'image/jpeg', 3=>'image/png',4=>'image/pjpeg',5=>'image/x-png',6=>'image/jpg');
		
		if($file['size']>$limitSize)
		{
			$rs['error'] = '1';
			$rs['msg']	 = '图片超过规定大小!';
		}
		elseif($file['error']==4)
		{
			$rs['error'] = '1';
			$rs['msg']	 = '图片文件损害!';
		}
		elseif($file['size']==0)
		{
			$rs['error'] = '1';
			$rs['msg']	 = '空图片或者超过规定大小';
		}
		elseif( !in_array($file['type'],$type_maping) )
		{
			$rs['error'] = '1';
			$rs['msg']	 = '图片类型错误!';
		}
		else
		{
			$rs['error'] = 'no';
			$rs['msg']	 = 'success';
		}
		return $rs;
	}
	
	/**
	 * 递归方式的对变量中的特殊字符进行转义以及过滤标签
	 */
	function addslashes_deep($value)
	{
		if (empty($value))return $value;
		//Huige 过滤html标签,防止sql注入
		return is_array($value) ? array_map('addslashes_deep', $value) : strip_tags(addslashes($value));
	}
	
	
	/**
	 * @param   mix     $value
	 * @return  mix
	 */
    function stripslashes_deep($value)
	{
		if (empty($value))return $value;
		return is_array($value) ? array_map('stripslashes_deep', $value) : stripslashes($value);
	}
	
	/**
	 * 以新浪微博的字数统计方式统计字数（简单版）
	 * 中文算1个，英文算0.5个，全角字符算1个，半角字符算0.5个。
	 * @param string $string
	 * @return integer
	 */
    function strlen_weibo($string)
	{
		if(is_string($string))
		{
			$string=trim(trim($string,'&nbsp;'));
			return (strlen($string) + mb_strlen($string,'UTF-8')) / 4;
		}
		return false;
	}
	/**
	 * 截取指定长度的字符串，超出部分用 ..替换
	 * @param string $text
	 * @param int $length
	 * @param string $replace
	 * @param string $encoding
	 */
	function substr_format($text, $length, $replace='..', $encoding='UTF-8')
	{
		if ($text && mb_strlen($text, $encoding)>$length)
		{
			return mb_substr($text, 0, $length, $encoding).$replace;
		}
		return $text;
	}
	/**
	 *
	 * 字符编码转换
	 *
	 * */
	function xwb_iconv($source, $in, $out)
	{
		$in		= strtoupper($in);
		$out	= strtoupper($out);
		if ($in == "UTF8"){
			$in = "UTF-8";
		}
		if ($out == "UTF8"){
			$out = "UTF-8";
		}
		if($in==$out){
			return $source;
		}
	
		if(function_exists('mb_convert_encoding')) {
			return mb_convert_encoding($source, $out, $in );
		}elseif (function_exists('iconv'))  {
			return iconv($in,$out."//IGNORE", $source);
		}
		return $source;
	}
	
	
	/**
	 *  Created:  2010-10-28
	 *
	 *  截取一定长度的字符串
	 *  @Author guoliang1
	 *
	 ***************************************************/
	
	function cut_string($str, $len)
	{
		// 检查长度
		if (mb_strwidth($str, 'UTF-8')<=$len)
		{
			return $str;
		}
		// 截取
		$i 		= 0;
		$tlen 	= 0;
		$tstr 	= '';
	
		while ($tlen < $len)
		{
			$chr 	= mb_substr($str, $i, 1, 'UTF-8');
			$chrLen = ord($chr) > 127 ? 2 : 1;
			if ($tlen + $chrLen > $len) break;
			$tstr .= $chr;
			$tlen += $chrLen;
			$i ++;
		}
	
		if ($tstr != $str)
		{
			$tstr .= '...';
		}
	
		return $tstr;
	}
	/**
	 *  Created:  2010-10-28
	 *
	 *  防止XSS攻击,htmlspecialchars的别名
	 *
	 ***************************************************/
	
	function escape($str,  $quote_style = ENT_COMPAT )
	{
		return htmlspecialchars($str, $quote_style);
	}
	/**
	 * 格式化时间
	 *
	 * */
	function wb_date_format($time,$format='m月d日 H:i')
	{
		$now = time();
		$t   = $now - $time;
		if($t >= 3600)
		{
			if(date('Y')==date('Y',$time))
				$time =date($format,$time);
			else
				$time =date('Y年m月d日 H:i',$time);
		}
		elseif ($t < 3600 && $t >= 60)
			$time = floor($t / 60) . "分钟前";
		else
			$time = "刚刚";
		return $time;
	}
	
	function isChinese($string)
	{
		if(preg_match("/^[\x{4e00}-\x{9fa5}]+$/u",$string))
			return true;
		return false;
	}
	function isMobile($mobile)
	{
		if(preg_match("/^1[345689]\d{9}$/", $mobile))
			return true;
		return false;
	}
	function dayToWeek($time)
	{
		$time = empty($time) ? TIME : $time;
		$date[0] = '周日';
		$date[1] = '周一';
		$date[2] = '周二';
		$date[3] = '周三';
		$date[4] = '周四';
		$date[5] = '周五';
		$date[6] = '周六';
		return $date[Date('w',$time)];
	}
	
	/**
	 * 检测是否为邮箱
	 * @param $val
	 * @param $domain
	 * @return boolean
	 */
	function is_email($val,$domain="")
	{
		if(!$domain)
		{
			if( preg_match("/^[a-z0-9-_.]+@[\da-z][\.\w-]+\.[a-z]{2,4}$/i", $val) )
			return TRUE;
			return FALSE;
		}

		if( preg_match("/^[a-z0-9-_.]+@".$domain."$/i", $val) )
		return TRUE;
		return FALSE;
	}
	// junz先生
	//http://www.oschina.net/code/snippet_162279_7186
	//可逆加密
	function extend_decrypt($encryptedText,$key)
	{
		$cryptText 		= base64_decode($encryptedText);
		$ivSize 		= mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB);
		$iv 			= mcrypt_create_iv($ivSize, MCRYPT_RAND);
		$decryptText 	= mcrypt_decrypt(MCRYPT_RIJNDAEL_256, $key, $cryptText, MCRYPT_MODE_ECB, $iv);
		
		return trim($decryptText);
	}
	//http://www.oschina.net/code/snippet_162279_7186
	//可逆解密
	function extend_encrypt($plainText,$key)
	{
		$ivSize			= mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB);
		$iv 			= mcrypt_create_iv($ivSize, MCRYPT_RAND);
		$encryptText	= mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $key, $plainText, MCRYPT_MODE_ECB, $iv);
		
		return trim(base64_encode($encryptText));
	}
	
	
?>