本文介绍了如果值重复则从多维数组中删除的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我的数组
Array
(
[0] => Array
(
[event_key] => 1
[event_id] => 5
[event_desc] => Test Event 1
)
[1] => Array
(
[event_key] => 2
[event_id] => 2
[event_desc] => Test Event 2
)
[2] => Array
(
[event_key] => 3
[event_id] => 5
[event_desc] => Test Event 3
)
[3] => Array
(
[event_key] => 4
[event_id] => 4
[event_desc] => Test Event 4
)
[4] => Array
(
[event_key] => 5
[event_id] => 5
[event_desc] => Test Event 5
)
)
如果event_id是重复的,我想删除一个子数组
I want to remove a sub array if event_id is duplicate
因此所需的结果是
Array
(
[0] => Array
(
[event_key] => 1
[event_id] => 5
[event_desc] => Test Event 1
)
[1] => Array
(
[event_key] => 2
[event_id] => 2
[event_desc] => Test Event 2
)
[2] => Array
(
[event_key] => 4
[event_id] => 4
[event_desc] => Test Event 4
)
)
推荐答案
类似d窍门:
$knownIds = array();
foreach( $myArray AS $key=>$item ) {
if( array_key_exists($item['event_id'], $knownIds) === true ) {
unset( $myArray[$key] );
} else {
$knownIds[$item['event_id']] = $key; // value does not matter really here
}
}
$myArray = array_values($myArray);
其中 $ myArray
是您的源数组。
这篇关于如果值重复则从多维数组中删除的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!