PHP：检查的价值和关键的多维数组存在 [英] PHP: Check if value and key exist in multidimensional array

问题描述

只是想知道，如果你能够给我一个手这样的：

Just wondering if you can give me a hand with this:

我有一个多维数组...

I have a multidimensional array...

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

什么是检查，如果数组$ my_array包含关键字ID，其值152.我不需要回应，或使用任何值的任意值，最快和最有效的方式的想法。我只需要它来检查（返回true），如果数组有ID为钥匙和值152的任何记录。

Any idea about what would be the fastest and most efficient way to check if the array $my_array contains any value with the key "id" and its value 152. I don't need to echo or use any of the values. I just need to check (return true) if the array has any records with the ID "key" and the value "152" in it.

推荐答案

没有什么会比一个简单的循环速度更快。您可以混合和匹配一些阵列功能来做到这一点，但他们只会被实现为一个循环了。

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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