延伸到我的最后一个问题，我有一个像下面这样的数组:
Array
(
[0] => Array
(
[id] => 1
[uid] => 746
[lid] => 748
)
[1] => Array
(
[id] => 6
[uid] => 746
[lid] => 744
)
[2] => Array
(
[id] => 11
[uid] => 749
[lid] => 743
)
)
我现在想要的是合并值与相同的uid应该输出为:
Array
(
[0] => Array
(
[id] => 1,6
[uid] => 746
[lid] => 748,744
)
[1] => Array
(
[id] => 11
[uid] => 749
[lid] => 743
)
)
有可能吗?我不知道它是否有任何功能
如果要将此插入到数据库中，请不要这样做，因为这将长期损害您的利益。无论如何，没有内置函数可以做到这一点。您只需要一个简单的foreach循环。考虑这个例子:
$new_values = array();
$values = array(
array('id'=> 1, 'uid' => 746, 'lid' => 748),
array('id'=> 6, 'uid' => 746, 'lid' => 744),
array('id'=> 11, 'uid' => 749, 'lid' => 743),
);
foreach($values as $value) {
if(isset($new_values[$value['uid']])) {
$temp = $new_values[$value['uid']];
$temp['id'] .= ',' . $value['id'];
$temp['lid'] .= ',' . $value['lid'];
$new_values[$value['uid']] = $temp;
} else {
$new_values[$value['uid']] = $value;
}
}
$new_values = array_values($new_values); // reindex keys
我建议建立一个uid-Array(假设你的数组在$array):
$uid_array = array();
foreach($array as $key => $val) {
$uid = $val["uid"];
if(! isset($uid_array[$uid])) {
$uid_array[$uid] = array();
}
if(! isset($uid_array[$uid]["id"])) {
$uid_array[$uid]["id"] = $val["id"];
} else {
$uid_array[$uid]["id"].= ",".$val["id"];
}
if(! isset($uid_array[$uid]["lid"])) {
$uid_array[$uid]["lid"] = $val["lid"];
} else {
$uid_array[$uid]["lid"].= ",".$val["lid"];
}
}
我不知道一个函数会给你你正在寻找的，但这将给你你想要的:
function myArrayMerge($arr)
{
$result = array();
foreach($arr as $user_array)
{
$result[$user_array['uid']]['id'][$user_array['id']] = $user_array['id'];
$result[$user_array['uid']]['lid'][$user_array['lid']] = $user_array['lid'];
}
$output = array();
foreach($result as $uid => $result_array) {
$output[] = array('id' => implode(',', $result_array['id']), 'uid' => $uid, 'lid' => implode(',', $result_array['lid']));
}
return $output;
}