phpcms实现动态价格实现方法代码示例

什么是动态价格（自命名）？--一般来说商品有个固定的价格，随着节假日或者促销活动可能会发生价格变化，结束后又恢复原价，如果每次价格变化都需要修改价格，那么不仅在时间上不好把握，也需要消耗更多的人力。 为了适应这种情况，我们可以给价格在预期的时间段赋予一个新的价格，那么，动态价格就是--给未来的时间段设置一个新的价格，当这个时间到来的时候自动采用新的价格。
要点：
1.优先级:特定时间 > 节假日(不带年份) > 常规价格
2.如何读取数据
3.如何转为图表
效果图：
动态价格添加及列表
核心代码：

/**
* 获取动态价格节点数据
* @param type $pid
* @param type $qbdate
* @param type $qedate
* @return type
*/
public function get_data($pid,$qbdate="",$qedate="")
{
//查询时间容错
if($qbdate>$qedate){
$tmpdate=$qbdate;
$qbdate=$qedate;
$qedate=$tmpdate;
}
$today=mktime(0,0,0,date('m'),date('d'),date('Y'));
//is_date 是app functions global.funs.php中的自定义函数
if(empty($qbdate) || !is_date($qbdate)) $qbdate=strtotime("-60 days",$today);//默认查询开始年份
if(empty($qedate) || !is_date($qedate))$qedate=strtotime("+60 days",$today);
//获取景点信息
$this->table_name =$this->db_tablepre.'travel_scenic';
$pid = intval($pid);
if(!$pid) return false;
$r = $this->get_one(array('id'=>$pid));
$data['pid']=$r['id'];
$data['title']=$r['title'];
$data['price']=$r['price'];
$data['cost']=$r['cost'];
$data['qbdate']=$qbdate;
$data['qedate']=$qedate;
$days=ceil(abs($qbdate-$qedate)/86400);//查询开始日期与结束日期的天数
//给时间段内的数组赋初值（基本价格）
for($i=0;$i<=$days;$i++){
$the_day=strtotime("+".$i." days",$qbdate);
$y=intval(date('Y',$the_day));
$m=intval(date('m',$the_day));
$d=intval(date('d',$the_day));
$price_data[$y.'_'.$m.'_'.$d]=$data['price'];
$cost_data[$y.'_'.$m.'_'.$d]=$data['cost'];
$desc_data[$y.'_'.$m.'_'.$d]="";
}
//SQL查询准备
$qbyear=date('Y',$qbdate);
$qbmonth=date('m',$qbdate);
$qbday=date('d',$qbdate);
$qeyear=date('Y',$qedate);
$qemonth=date('m',$qedate);
$qeday=date('d',$qedate);
$this->table_name = 'travel_scenic_dynprice';
//此处用循环来解决跨年度查询的问题，每次查询一年的，然后合并；
for($qyear=$qbyear;$qyear<=$qeyear;$qyear++){
$this->query("select*,
DATE_FORMAT(concat(CASE byear WHEN 0 THEN '".$qyear."' ELSE byear END ,'-',bmonth,'-',bday),'%Y-%m-%d') as bdate,
DATE_FORMAT(concat(CASE eyear WHEN 0 THEN '".$qyear."' ELSE eyear END ,'-',emonth,'-',eday),'%Y-%m-%d') as edate
from phpcms_travel_scenic_dynprice
where pid=".$pid." and priority=1 and status=1
and DATE_FORMAT(concat(CASE byear WHEN 0 THEN '".$qyear."' ELSE byear END ,'-',bmonth,'-',bday),'%Y-%m-%d') >='".$qbyear."-".$qbmonth."-".$qbday."'
and DATE_FORMAT(concat(CASE eyear WHEN 0 THEN '".$qyear."' ELSE eyear END ,'-',emonth,'-',eday),'%Y-%m-%d')<='".$qeyear."-".$qemonth."-".$qeday."'
order by id asc");
$r2=$this->fetch_array();
foreach ($r2 as $key => $value) {
$tmp_bdate=strtotime($r2[$key]['bdate']);
$tmp_edate=strtotime($r2[$key]['edate']);
$days=ceil(abs($tmp_bdate-$tmp_edate)/86400);
//echo $days;
for($i=0;$i<=$days;$i++){
$the_day=strtotime("+".$i." days",$tmp_bdate);
$y=intval(date('Y',$the_day));
$m=intval(date('m',$the_day));
$d=intval(date('d',$the_day));
$price_data[$y.'_'.$m.'_'.$d]=$r2[$key]['dynprice'];
$cost_data[$y.'_'.$m.'_'.$d]=$r2[$key]['dyncost'];
$desc_data[$y.'_'.$m.'_'.$d]=$r2[$key]['description'];
}
}
//合并每年的数组
$price_data+=$price_data;
$cost_data+=$cost_data;
}
//print_r($price_data);
//此处针对特定时间的价格进行处理。
$this->query("select*,
DATE_FORMAT(concat(byear ,'-',bmonth,'-',bday),'%Y-%m-%d') as bdate,
DATE_FORMAT(concat(eyear,'-',emonth,'-',eday),'%Y-%m-%d') as edate
from phpcms_travel_scenic_dynprice
where pid=".$pid." and priority=2 and status=1
and DATE_FORMAT(concat(byear,'-',bmonth,'-',bday),'%Y-%m-%d') >='".$qbyear."-".$qbmonth."-".$qbday."'
and DATE_FORMAT(concat(eyear,'-',emonth,'-',eday),'%Y-%m-%d')<='".$qeyear."-".$qemonth."-".$qeday."'
order by id asc");
$r3=$this->fetch_array();
foreach ($r3 as $key => $value) {
$tmp_bdate=strtotime($r3[$key]['bdate']);
$tmp_edate=strtotime($r3[$key]['edate']);
$days=ceil(abs($tmp_bdate-$tmp_edate)/86400);
for($i=0;$i<=$days;$i++){
$the_day=strtotime("+".$i." days",$tmp_bdate);
//echo date("Y-m-d",$the_day)." ";
$y=intval(date('Y',$the_day));
$m=intval(date('m',$the_day));
$d=intval(date('d',$the_day));
$price_data[$y.'_'.$m.'_'.$d]=$r3[$key]['dynprice'];
$cost_data[$y.'_'.$m.'_'.$d]=$r3[$key]['dyncost'];
$desc_data[$y.'_'.$m.'_'.$d]=$r3[$key]['description'];
}
}
//去除price_data和cost_data连续都相同的节点
$i=1;
$count=count($price_data);
foreach ($price_data as $key => $value) {
if($i==1){
$first_node=$price_data[$key];
$first_node2=$cost_data[$key];
}
if($i!=1 && $i!=$count){
if($price_data[$key]==$first_node && $cost_data[$key]==$first_node2 ){
unset($price_data[$key]);
unset($cost_data[$key]);
unset($desc_data[$key]);
}else{
$first_node=$price_data[$key];
$first_node2=$cost_data[$key];
}
}
$i++;
}
$data['price_data']=$price_data;
$data['cost_data']=$cost_data;
$data['desc_data']=$desc_data;
//print_r($data);
return $data;
}
/**
* 根据数据生成chart所需的data数据
* @param type $data
* @return type
*/
public function get_chartdata($data)
{
$price_data=$data['price_data'];
$cost_data=$data['cost_data'];
$desc_data=$data['desc_data'];
$chartdata="[";
foreach ($price_data as $key => $value) {
$keys=explode("_",$key);
$chartdata.="[new Date(".$keys[0].", ".($keys[1]-1).", ".$keys[2]."), ".$price_data[$key].",'".$desc_data[$key]."'],";
}
$chartdata=rtrim($chartdata,',').']';
$chartdata2="[";
foreach ($cost_data as $key => $value) {
$keys=explode("_",$key);
$chartdata2.="[new Date(".$keys[0].", ".($keys[1]-1).", ".$keys[2]."), ".$cost_data[$key].",'".$desc_data[$key]."'],";
}
$chartdata2=rtrim($chartdata2,',').']';
return array('pid'=>$data['pid'],
'title'=>$data['title'],
'qbdate'=>$data['qbdate'],
'qedate'=>$data['qedate'],
'chartprice'=>$chartdata,
'chartcost'=>$chartdata2);
}

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