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<?php
class myhttp
{
    var $_host;
    var $_url;
    var $_port;
    var $_errno;
    var $_errstr;
    var $_header;
    var $_body;
   
    function __construct($url)
    {
        if($url) setUrl($url);
    }
   
    function setUrl($url)
    {
        if(preg_match("{http://([^/]+)[:(\\d+)]?(.+)}",$url,$match))
        {
            $this->_host = $match[1];
            if(count($match) == 3)
            {
                $this->_port = 80;
                $this->_url = $match[2];
            }
            else
            {
                $this->_port = $match[2];
                $this->_url = $match[3];
            }
            $this->$_header = array();
            $this->$_body = "";
        }
        else
        {
          &nbs


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<?php
$a = 1;
function b(&$c)
{
$c++;
return $c;
}
$d=b($a); // d = 2; a = 2;
$d++; // d = 2;
echo($a); // ÏÔʾ2
?>
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<?php
$a = 1;
function &b(&$c)
{
$c++;
return $c;
}
$d=b($a); // ×¢ÒâÕâÀï dÓëb·µ»ØµÄÖµ(È·ÇÐÀ´Ëµ, ÕâÀï·µ»ØµÄ² ......
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