在Jakub的出色回答的基础上，这里有一个更通用的搜索，将允许指定键(不仅仅是uid):

function searcharray($value, $key, $array) {
   foreach ($array as $k => $val) {
       if ($val[$key] == $value) {
           return $k;
       }
   }
   return null;
}

用法:$results = searcharray('searchvalue'， searchkey， $array);

$a = ['x' => ['eee', 'ccc'], 'b' => ['zzz']];

$found = null;
$search = 'eee';

array_walk($a, function ($k, $v) use ($search, &$found) {
    if (in_array($search, $k)) {
        $found = $v;
    }
});

var_dump($found);

扩展@mayhem创建的函数，这个例子将更多的是一个“模糊”搜索，如果你只是想匹配搜索字符串的一部分(大部分):

 function searchArrayKeyVal($sKey, $id, $array) {
    foreach ($array as $key => $val) {
        if (strpos(strtolower($val[$sKey]), strtolower(trim($id))) !== false) {
            return $key;
        }
    }
         return false;
 }

例如，数组中的值是Welcome to New York!而你只想要第一个“纽约”

如果问题，即。

$a = [
     [
       "_id" => "5a96933414d48831a41901f2",
       "discount_amount" => 3.29,
       "discount_id" => "5a92656a14d488570c2c44a2",
     ],
     [
       "_id" => "5a9790fd14d48879cf16a9e8",
       "discount_amount" => 4.53,
       "discount_id" => "5a9265b914d488548513b122",
     ],
     [
       "_id" => "5a98083614d488191304b6c3",
       "discount_amount" => 15.24,
       "discount_id" => "5a92806a14d48858ff5c2ec3",
     ],
     [
       "_id" => "5a982a4914d48824721eafe3",
       "discount_amount" => 45.74,
       "discount_id" => "5a928ce414d488609e73b443",
     ],
    [
       "_id" => "5a982a4914d48824721eafe55",
       "discount_amount" => 10.26,
       "discount_id" => "5a928ce414d488609e73b443",
     ],
   ];

岁:

function searchForId($id, $array) {
    $did=0;
    $dia=0;
   foreach ($array as $key => $val) {
       if ($val['discount_id'] === $id) {
           $dia +=$val['discount_amount'];
           $did++;
       }
   }
    if($dia != '') {
        echo $dia;
        var_dump($did);
    }
   return null;
};
print_r(searchForId('5a928ce414d488609e73b443',$a));

我正在寻找类似于MySQL像%term%的功能。根据本页的答案。我能够从文件中搜索JSON数组。

user_list。Json看起来像下面的示例:

{
  "user-23456": {
        "name": "John Doe",
        "age": "20",
        "email": "doe@sample.com",
        "user_id": "23456"
    },
    "user-09876": {
        "name": "Ronojoy Adams",
        "age": "35",
        "email": "joy@sample.com",
        "user_id": "09876"
    },
    "user-34890": {
        "name": "Will Artkin",
        "age": "16",
        "email": "will@sample.com",
        "user_id": "34890"
    },
}

/*
*search_key_like
*/

function search_key_like($value, $key, $array) {
     $results=array();
    $keyword = preg_quote($value, '~');
   foreach ($array as $k => $val) {
//if name a is spell John and keyword is sent as joh or JOH it will return null
//to fix the issue convert the string into lowercase and uppercase
       $data=array($val[$key],strtolower($val[$key]),strtoupper($val[$key]));
       if (preg_grep('~' . $keyword . '~', $data)) {
       array_push($results,$val[$key]);           
    }
   }
   return $results;
}

使用===提取JSON文件===

 $user_list_json='./user_list.json';
    if(file_exists($user_list_json) && file_get_contents($user_list_json)){
    $file_json_data=file_get_contents($user_list_json);
        
    $json_array_data=json_decode($file_json_data,true);
        
        $user_name_like = search_key_like('ron', 'name', $json_array_data);
   
         print "<pre>".print_r($user_name_like,true);
    }

看起来array_filter将是合适的解决方案…

$userdb=Array
(
    (0) => Array
        (
            (uid) => '100',
            (name) => 'Sandra Shush',
            (url) => 'urlof100'
        ),

    (1) => Array
        (
            (uid) => '5465',
            (name) => 'Stefanie Mcmohn',
            (pic_square) => 'urlof100'
        ),

    (2) => Array
        (
            (uid) => '40489',
            (name) => 'Michael',
            (pic_square) => 'urlof40489'
        )
);

PHP代码

<?php 
$search = 5465;
$found = array_filter($userdb,function($v,$k) use ($search){
  return $v['uid'] == $search;
},ARRAY_FILTER_USE_BOTH); // With latest PHP third parameter is optional.. Available Values:- ARRAY_FILTER_USE_BOTH OR ARRAY_FILTER_USE_KEY  

$values= print_r(array_values($found));
$keys =  print_r(array_keys($found));