Question

我有像这样的多维数组

$queryRequest = array(
   "Pub" => array(
      "4bf58dd8d48988d11b941735",
        "52e81612bcbc57f1066b7a06",
        "4bf58dd8d48988d155941735"
    ),
    "Gym" => array(
      "4bf58dd8d48988d175941735"
    )
);

我需要创建一个查找id的函数 - 我需要它来返回父键。

所以我有4bf58dd8d48988d155941735 - 我需要它来返回Pub

$key = array_search($catId, $haystack);

没有工作

Answer 1

需要简单foreach，您可以执行以下操作： -

<?php

$queryRequest = array(
   "Pub" => array(
      "4bf58dd8d48988d11b941735",
        "52e81612bcbc57f1066b7a06",
        "4bf58dd8d48988d155941735"
    ),
    "Gym" => array(
      "4bf58dd8d48988d175941735"
    )
);

function searchparentkey($value,$arr){
   foreach($arr as $key=>$val){
         if(in_array($value,$val)) {
            return $key;
         }
   }

}

echo $parent_key = searchparentkey("4bf58dd8d48988d11b941735",$queryRequest);

输出： - https://eval.in/635957

Answer 2

你走了：

<?php
$queryRequest =
Array
(
    (Pub) => Array
        (
            (0) => '4bf58dd8d48988d11b941735',
            (1) => '52e81612bcbc57f1066b7a06',
            (2) => '4bf58dd8d48988d155941735'
        ),

    (Gym) => Array
        (
            (0) => '4bf58dd8d48988d175941735',
        )
);

function searchName($id, $array) {
   foreach ($array as $key => $val) {
       if ($val['0'] === $id) {
           return $key;
       }
   }
   return null;
}

echo searchName('4bf58dd8d48988d11b941735', $queryRequest);
?>

DEMO

Answer 3

您可以尝试这样：

    $queryRequest = array (
        "Pub" => array (
                "4bf58dd8d48988d11b941735",
                "52e81612bcbc57f1066b7a06",
                "4bf58dd8d48988d155941735" 
        ),
        "Gym" => array (
                "4bf58dd8d48988d175941735" 
        ) 
);

function search_key($needle, $haystack)
{
    return array_keys( array_filter( $haystack, function ($v) use($needle) {
        return in_array( $needle, $v );
    } ) );
}

$result = search_key( '52e81612bcbc57f1066b7a06', $queryRequest );
var_dump( $result );
?>

从多维数组值

3 个答案: