PHP封装curl的调用接口及常用函数详解

如下所示：

= $length){
	  $next_str = "…";
	 }else{
	  $next_str = "";
	 }
	 if(function_exists("mb_substr")){
	  if($suffix)
	   // return mb_substr($str, $start, $length, $charset)."…";
	   return mb_substr($str, $start, $length, $charset).$next_str;
	  else
	   return mb_substr($str, $start, $length, $charset);
	 }elseif(function_exists('iconv_substr')) {
	  if($suffix)
	   // return iconv_substr($str,$start,$length,$charset)."…";
	   return iconv_substr($str,$start,$length,$charset).$next_str;
	  else
	   return iconv_substr($str,$start,$length,$charset);
	 }
	 $re['utf-8'] = "/[x01-x7f]|[xc2-xdf][x80-xbf]|[xe0-xef][x80-xbf]{2}|[xf0-xff][x80-xbf]{3}/";
	 $re['gb2312'] = "/[x01-x7f]|[xb0-xf7][xa0-xfe]/";
	 $re['gbk'] = "/[x01-x7f]|[x81-xfe][x40-xfe]/";
	 $re['big5'] = "/[x01-x7f]|[x81-xfe]([x40-x7e]|xa1-xfe])/";
	 preg_match_all($re[$charset], $str, $match);
	 $slice = join("",array_slice($match[0], $start, $length));
	  if($suffix) return $slice."…";
	 if(!$suffix) return $slice;
	 return $slice;
	}
	/**
	 *用户名*隐藏
	 *$str = "如来神掌";
	 *echo cut_str($str, 1, 0).'**'.cut_str($str, 1, -1);
	 *输出：如**掌
	*/
	function cut_str($string, $sublen, $start = 0, $code = 'UTF-8')
	{
	 if($code == 'UTF-8')
	 {
	  $pa = "/[\x01-\x7f]|[\xc2-\xdf][\x80-\xbf]|\xe0[\xa0-\xbf][\x80-\xbf]|[\xe1-\xef][\x80-\xbf][\x80-\xbf]|\xf0[\x90-\xbf][\x80-\xbf][\x80-\xbf]|[\xf1-\xf7][\x80-\xbf][\x80-\xbf][\x80-\xbf]/";
	  preg_match_all($pa, $string, $t_string);
	  if(count($t_string[0]) - $start > $sublen) return join('', array_slice($t_string[0], $start, $sublen));
	  return join('', array_slice($t_string[0], $start, $sublen));
	 }
	 else
	 {
	  $start = $start*2;
	  $sublen = $sublen*2;
	  $strlen = strlen($string);
	  $tmpstr = '';
	  for($i=0; $i< $strlen; $i++)
	  {
	   if($i>=$start && $i< ($start+$sublen))
	   {
	    if(ord(substr($string, $i, 1))>129)
	    {
	     $tmpstr.= substr($string, $i, 2);
	    }
	    else
	    {
	     $tmpstr.= substr($string, $i, 1);
	    }
	   }
	   if(ord(substr($string, $i, 1))>129) $i++;
	  }
	  //if(strlen($tmpstr)< $strlen ) $tmpstr.= "...";
	  return $tmpstr;
	 }
	}
	/*
	*解决json_encode转换中文的问题，在php5.4下json_encode本身解决的这个问题
	*/
	function unescapedUnicode($match)
	{
		return mb_convert_encoding(pack('H*', $match[1]), 'UTF-8', 'UCS-2BE');
	}
	/**
	*截取手机号
	*demo:13112345678
	*return:131****5678
	*/
	function hidtel($phone){
	 $IsWhat = preg_match('/(0[0-9]{2,3}[-]?[2-9][0-9]{6,7}[-]?[0-9]?)/i',$phone); //固定电话
	 if($IsWhat == 1){
	  return preg_replace('/(0[0-9]{2,3}[-]?[2-9])[0-9]{3,4}([0-9]{3}[-]?[0-9]?)/i','$1****$2',$phone);
	 }else{
	  return preg_replace('/(1[358]{1}[0-9])[0-9]{4}([0-9]{4})/i','$1****$2',$phone);
	 }
	}
	//获取IP
	function getIp()
	{
		if (isset($_SERVER)){
			if (isset($_SERVER["HTTP_X_FORWARDED_FOR"])){
				$realip = $_SERVER["HTTP_X_FORWARDED_FOR"];
			} else if (isset($_SERVER["HTTP_CLIENT_IP"])) {
				$realip = $_SERVER["HTTP_CLIENT_IP"];
			} else {
				$realip = $_SERVER["REMOTE_ADDR"];
			}
		} else {
			if (getenv("HTTP_X_FORWARDED_FOR")){
				$realip = getenv("HTTP_X_FORWARDED_FOR");
			} else if (getenv("HTTP_CLIENT_IP")) {
				$realip = getenv("HTTP_CLIENT_IP");
			} else {
				$realip = getenv("REMOTE_ADDR");
			}
		}
	
		return $realip;
	}
	//把汉字转换为数字
	function getUnicodeFromOneUTF8($word)
	{
		//获取其字符的内部数组表示，所以本文件应用utf-8编码! 
		//$word = iconv("gb2312", "utf-8", $word);
		if (is_array($word)) 
			$arr = $word; 
		else 
			$arr = str_split($word); 
		//此时，$arr应类似array(228, 189, 160) 
		//定义一个空字符串存储 
		$bin_str = ''; 
		//转成数字再转成二进制字符串，最后联合起来。 
		foreach ($arr as $value) 
			$bin_str .= decbin(ord($value)); 
		//此时，$bin_str应类似111001001011110110100000
		//正则截取 
		$bin_str = preg_replace('/^.{4}(.{4}).{2}(.{6}).{2}(.{6})$/','$1$2$3', $bin_str);
		//此时， $bin_str应类似0100111101100000,如果是汉字"你"
		return bindec($bin_str); 
		//返回类似20320， 汉字"你" 
		//return dechex(bindec($bin_str)); 
		//如想返回十六进制4f60，用这句 

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