我有一个包含 3 个参数的数组:日期、事件和标签。
这是数组:
Array
(
[date] => 1554328800
[events] => Array
(
[0] => 130
[1] => 131
[2] => 163
)
[tags] => Array
(
[0] => 4
[1] => "1,3,4"
[2] => "1,3"
)
)
事件和标签之间的关系在 key 中,因此位置为 0 的事件 130 的标签为 4。
如您所见,有一些重复的标签(事件 130 和 131 或 131 和 163)。
我怎样才能得到一个只有像这样的重复事件的数组:
Array
(
[0] => Array
(
[date] => 1554328800
[events] => Array
(
[0] => 130
[1] => 131
)
[tags] => 4
)
[1] => Array
(
[date] => 1554328800
[events] => Array
(
[0] => 131
[1] => 163
)
[tags] => Array
(
[0] => 1
[1] => 3
)
)
)
我会这样做:
列出每个单独标签的事件
这将给出几组事件,可以在下一步中使用
列出上一步中发生的每组事件的标签
产生步骤 2 的结果
这是代码,也可以在 3v4l.org 上运行:
// Sample input
$data = [
"date" => 1554328800,
"events" => [130, 131, 163],
"tags" => [4, "1,3,4", "1,3"]
];
// 1. List the events per individual tag
foreach($data["tags"] as $i => $val) {
$vals = explode(",", $val);
foreach($vals as $val) {
$eventsByTag[$val][] = $data["events"][$i];
}
}
// 2. List the tags per set of events
foreach($eventsByTag as $tag => $events) {
sort($events, SORT_NUMERIC);
$tagsByEvents[implode(",", $events)][] = $tag;
}
// 3. produce the result
foreach($tagsByEvents as $events => $tags) {
$events = explode(",", $events);
if (count($tags) == 1) $tags = $tags[0];
$result[] = [
"date" => $data["date"],
"events" => $events,
"tags" => $tags
];
}
print_r($result);
$date = array();
$date['date'] = 1554328800;
$date['events'] = array(130, 131, 163);
$date['tags'] = array(4, "1,3,4", "1,3");
$events_by_tag = array(); //gather events grouped by tag
foreach ($date['events'] as $pos => $event) { //parse all events
if (is_string($date['tags'][$pos])) { //if tag is a string <=> if there are more than one tag for the current event
$tags = explode(',', $date['tags'][$pos]); //explode string to loop over the tags
foreach ($tags as $tag) {
if (is_array($events_by_tag[$tag])) { //if tag has already been found and then an array exists to store it
array_push($events_by_tag[$tag], $event);
} else {
$events_by_tag[$tag] = array($event); //else create an array for the next times this tag will be found and store it inside
}
}
} else { //if there's a single tag which is a integer
if (is_array($events_by_tag[$tag])) { //if tag has already been found and then an array exists to store it
array_push($events_by_tag[$date['tags'][$pos]], $event);
} else {
$events_by_tag[$date['tags'][$pos]] = array($event); //else create an array for the next times this tag will be found and store it inside
}
}
}
$result_array = array(); //final array reorganized + date
foreach ($events_by_tag as $tag => $events) {
$tmp_array['date'] = $date['date'];
$tmp_array['events'] = $events;
$tmp_array['tags'] = $tag;
array_push($result_array, $tmp_array);
}
这并不完全符合您的预期,因为它不会合并共享标签的事件。我认为这部分需要另一篇文章来开发,但否则我可以修改我的答案,以便在必要时为您提供指导。
请检查这个
$sarr=['date'=>1554328800,
'events'=>
[
130,
131,
163
],
'tags'=>
[
4,
"1,3,4",
"1,3"
]
];
$tagarr=[];
$events=$sarr['events'];
$index=0;
foreach( $sarr['tags'] as $tag)
{
$t=explode(",",$tag);
$cnt=count($t);
for($idx=0;$idx<$cnt;$idx++)
$tagarr[$t[$idx]][]=$events[$index];
$index++;
}
$cnt=count($tagarr);
$myarr=[];
foreach($tagarr as $key=>$value)
{
$myarr[]=['date'=>$sarr['date'],'events'=>$value,'tags'=>$key];
}
ec ho "<pre>";
print_r($myarr);
echo "</pre>";
输出为
Array
(
[0] => Array
(
[date] => 1554328800
[events] => Array
(
[0] => 130
[1] => 131
)
[tags] => 4
)
[1] => Array
(
[date] => 1554328800
[events] => Array
(
[0] => 131
[1] => 163
)
[tags] => 1
)
[2] => Array
(
[date] => 1554328800
[events] => Array
(
[0] => 131
[1] => 163
)
[tags] => 3
)
)