检查多维数组的任何子数组中的特定键处是否存在特定值 [英] Check if a specific value exists at a specific key in any subarray of a multidimensional array

问题描述

我需要在多维数组中搜索任何索引子数组中的特定值.

I need to search a multidimensional array for a specific value in any of the indexed subarrays.

换句话说，我需要检查多维数组的单个列中的值.如果该值存在于多维数组中的任何位置，我想返回true，否则返回false

In other words, I need to check a single column of the multidimensional array for a value. If the value exists anywhere in the multidimensional array, I would like to return true otherwise false

$my_array = array(    
    0 =>  array(  
        "name"   => "john",  
        "id"    =>  4  
    ),  
    1   =>  array(  
        "name" =>  "mark",  
        "id" => 152  
    ), 
    2   =>  array(  
        "name" =>  "Eduard",  
        "id" => 152  
    )
);

我想知道最快最有效的方法来检查数组$my_array是否包含键为"id"的值.例如，如果id => 152在多维数组中的任意位置，我想要true.

I would like to know the fastest and most efficient way to check if the array $my_array contains a value with the key "id". For example, if id => 152 anywhere in the multidimensional array, I would like true.

推荐答案

没有什么比简单的循环要快的了.您可以混合匹配一些数组函数来实现，但是它们也将被实现为循环.

Nothing will be faster than a simple loop. You can mix-and-match some array functions to do it, but they'll just be implemented as a loop too.

function whatever($array, $key, $val) {
    foreach ($array as $item)
        if (isset($item[$key]) && $item[$key] == $val)
            return true;
    return false;
}

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