Question

鉴于此数组：

Array
(
[0] => Array
    (
        [title] => this is the newest post
        [ssm_featured_post_id] => 70
    )

[1] => Array
    (
        [title] => sdfsfsdf
        [ssm_featured_post_id] => 63
    )

[2] => Array
    (
        [title] => test
        [ssm_featured_post_id] => 49
    )

[3] => Array
    (
        [title] => Hello world!
        [ssm_featured_post_id] => 1
    )

)

将另一个类似数组与新值合并的最简单方法是什么。

第二个数组可能包含新项目或已删除项目。

我想保留第一个数组中项目的顺序，并将所有新项目添加到最后，并删除不在新数组中的任何项目

Array
(
[0] => Array
    (
        [title] => sdfsfsdf
        [ssm_featured_post_id] => 63
    )

[1] => Array
    (
        [title] => this is the newest post
        [ssm_featured_post_id] => 70
    )

[2] => Array
    (
        [title] => test
        [ssm_featured_post_id] => 49
    )

[3] => Array
    (

        [title] => Hello world!
        [ssm_featured_post_id] => 1
    )

[4] => Array
    (
        [title] => awesome post
        [ssm_featured_post_id] => 73
    )

)

Answer 1

您可以使用功能uasort，它允许您实现自己的比较功能

function cmp($a, $b) {
    if ($a['ssm_featured_post_id'] == $b['ssm_featured_post_id']) {
        return 0;
    }
    return ($a['ssm_featured_post_id'] < $b['ssm_featured_post_id']) ? -1 : 1; 
}

uasort($array, 'cmp');

通过传递数组

来删除重复项目扫描重复项目

$last_id=-1;
for($i=0; $i < cout($array); $i++){
  if($last_id==$array[$i]['ssm_featured_post_id']){
    unset($array[$i]);//Remove Duplicated Item
  }
  $last_id=$array[$i]['ssm_featured_post_id'];
}

Answer 2

使用array_merge，因为键是数字。 “如果输入数组具有相同的字符串键，则该键的后一个值将覆盖前一个键。但是，如果数组包含数字键，则后面的值不会覆盖原始值” http://php.net/manual/en/function.array-merge.php

Answer 3

好吧，因为我需要针对数组1检查数组2并合并数组2中的任何新内容，这个解决方案似乎有效：

$new_values = array_merge( $slides, $featured_posts );
$new_values = array_unique( $new_values, SORT_REGULAR );

php使用数字键合并2个多维数组，删除重复项

3 个答案: