通过非等值过滤多维数组以排除重复的记录

Question

下面是来自两个不同供稿的两个数组，它们共享不同的ID。因此，我必须依靠'BriefTitle'：通过'BriefTitle'和其他数据（例如[LocationCountry]，[StartDate]，[Condition]）可以知道这是同一记录。我想对'BriefTitle'进行比较以将其与其他'BriefTitle'记录进行比较，以过滤出重复项，因为它们包含在彼此中。我不是在寻找精确匹配，这是我在这里找到大多数解决方案的目的。

我喜欢sevavietl / mickmackusa提出的简短解决方案：php remove duplicates from multidimensional array by value

$result = array_reverse(array_values(array_column(
    array_reverse($data),
    null,
    'BriefTitle'
)));

但是，我的“ BriefTitle”是一个数组（似乎不适用于array_column），并且我不确定如何将substr函数应用于上述解决方案。

一些注意事项：

• 幸运的是，[BriefTitle] [0]始终是要比较的值
• [如果可能，我只想获取数据集的第一个实例，拒绝随后的任何重复项。

任何想法我应该如何处理？数组：

 [0] => Array
        (
            [Rank] => 422
            [id] => Array
                (
                    [0] => 152091
                )

            [Condition] => Array
                (
                    [0] => Depression
                    [1] => Ketamine
                )

            [BriefTitle] => Array
                (
                    [0] => Positron Emission Tomography Assessment of Ketamine Binding of the Serotonin Transporter
                )

            [LocationCountry] => Array
                (
                    [0] => Austria
                )

            [StartDate] => Array
                (
                    [0] => May 5, 2016
                )

            [LastUpdatePostDate] => Array
                (
                    [0] => October 15, 2018
                )

            [Entheogen] => ketamine
            [Source] => clinicaltrials.gov
        )   


    [1] => Array
        (
            [Rank] => 6673
            [id] => Array
                (
                    [0] => YSBSZ18291
                )

            [Condition] => Array
                (
                    [0] => Depressive Disorder
                    [1] => Ketamine
                )

            [BriefTitle] => Array
                (
                    [0] => Positron Emission Tomography assessment of Ketamine Binding of the Serotonin Transporter and its Relevance for Rapid Antidepressant Response
                    [1] => Die Rolle des Serotonintransporters bei der akuten antidepressiven Wirkung von Ketamin, untersucht mit Positronen-Emissions-Tomographie
                )

            [LocationCountry] => Array
                (
                    [0] => Austria
                )

            [StartDate] => Array
                (
                    [0] => 2016 05 01
                )

            [LastUpdatePostDate] => Array
                (
                    [0] => 2018 10 15
                )

            [Entheogen] => ketamine
            [Source] => clinicaltrialsregister.eu
        )

Answer 1

不幸的是，由于数据的性质（匹配的字符串可能是其他字符串的子字符串，具有不同的大小写），唯一的实际选择是强制执行此操作。循环遍历数组，随时存储标题，并检查当前标题是否与其中任何一个匹配：

$result = array();
$brieftitles = array();
foreach ($array as $arr) {
    $foundtitle = false;
    $title = $arr['BriefTitle'][0];
    foreach ($brieftitles as $btitle) {
        $foundtitle = (stripos($title, $btitle) !== false) || (stripos($btitle, $title) !== false);
        if ($foundtitle) break;
    }
    if (!$foundtitle) {
        $result[] = $arr;
        $brieftitles[] = $arr['BriefTitle'][0];
    }
}
print_r($result);

Demo on 3v4l.org