php 设置cookie高级用法

function getvis(&$pagesid,&$retime) {
  global $err,$conf,$HTTP_COOKIE_VARS,$_COOKIE;

  if(isset($_COOKIE['ant'])) $cot=$_COOKIE['ant'];
  elseif(isset($HTTP_COOKIE_VARS['ant'])) $cot=$HTTP_COOKIE_VARS['ant'];
  else $cot='';
  $cos=preg_split("/x/",$cot);
  $max=sizeof($cos);
  for($c=0;$c<$max;$c++) {
    if(strlen($cos[$c])==10) {
      $id=substr($cos[$c],0,2);
      eval("$id=0x$id;");
      $anct[$id]=$cos[$c];
    }
  }

  if(isset($_COOKIE['anm'])) $com=$_COOKIE['anm'];
  elseif(isset($HTTP_COOKIE_VARS['anm'])) $com=$HTTP_COOKIE_VARS['anm'];
  else $com='';
  $cos=preg_split("/x/",$com);
  $max=sizeof($cos);
  for($c=0;$c<$max;$c++) {
    if(strlen($cos[$c])==10) {
      $id=substr($cos[$c],0,2);
      eval("$id=0x$id;");
      $tim=substr($cos[$c],2,8);
      eval("$tim=0x$tim;");
      if($tim>=$conf->mtime) $ancm[$id]=$cos[$c];
    }
  }

  if(isset($_COOKIE['anw'])) $cow=$_COOKIE['anw'];
  elseif(isset($HTTP_COOKIE_VARS['anw'])) $cow=$HTTP_COOKIE_VARS['anw'];
  else $cow='';
  $cos=preg_split("/x/",$cow);
  $max=sizeof($cos);
  for($c=0;$c<$max;$c++) {
    if(strlen($cos[$c])==10) {
      $id=substr($cos[$c],0,2);
      eval("$id=0x$id;");
      $tim=substr($cos[$c],2,8);
      eval("$tim=0x$tim;");
      if($tim>=$conf->wtime) $ancw[$id]=$cos[$c];
    }
  }

  if(isset($_COOKIE['an1'])) $co1=$_COOKIE['an1'];
  elseif(isset($HTTP_COOKIE_VARS['an1'])) $co1=$HTTP_COOKIE_VARS['an1'];
  else $co1='';
  $cos=preg_split("/x/",$co1);
  $max=sizeof($cos);
  for($c=0;$c<$max;$c++) {
    if(strlen($cos[$c])==10) {
      $id=substr($cos[$c],0,2);
      eval("$id=0x$id;");
      $tim=substr($cos[$c],2,8);
      eval("$tim=0x$tim;");
      if($tim>=$conf->dtime) $anc1[$id]=$cos[$c];
    }
  }

  //current time in HEX
  if($conf->ctime>0x7FFFFFFF) {
    $t1=$conf->ctime/16;
    $t2=$conf->ctime&0xF;
    $ctimestr=sprintf("%07X%01X",$t1,$t2);
  }
  else {
    $ctimestr=sprintf("%08X",$conf->ctime);
  }

  reset($pagesid);
  while($e=each($pagesid)) {
    $k=$e[0];
    if(isset($anct[$k])) {
      $pagesid[$k].='|0';
      if(strlen($anct[$k])==10) {
        $tim=substr($anct[$k],2,8);
        eval("$tim=0x$tim;");
        $retime[$k]=$tim;
      }
    }
    else {
      $pagesid[$k].='|1';
      $anct[$k]=sprintf("%02X%s",$k,$ctimestr);
    }

    if(isset($ancm[$k])) $pagesid[$k].='|0';
    else {
      $pagesid[$k].='|1';
      $ancm[$k]=sprintf("%02X%s",$k,$ctimestr);
    }

    if(isset($ancw[$k])) $pagesid[$k].='|0';
    else {
      $pagesid[$k].='|1';
      $ancw[$k]=sprintf("%02X%s",$k,$ctimestr);
    }

    if(isset($anc1[$k])) $pagesid[$k].='|0';
    else {
      $pagesid[$k].='|1';
      $anc1[$k]=sprintf("%02X%s",$k,$ctimestr);
    }
  }

  $cot=join('x',$anct);
  $com=join('x',$ancm);
  $cow=join('x',$ancw);
  $co1=join('x',$anc1);

  //get path
  $path=$conf->url;
  $path=preg_replace("/^(http://)([^/]+)/i",'',$path);
  $path.='aa.php';
  //set cookie
  SetCookie('ant',$cot,time()+($conf->time1*3000),$path);
  SetCookie('anm',$com,time()+($conf->time1*31),$path);
  SetCookie('anw',$cow,time()+($conf->time1*7),$path);
  SetCookie('an1',$co1,time()+$conf->time1,$path);
}