抓住阵列值，如果一个特定的关键是有使用PHP [英] Grab array value if a specific key is there with PHP

问题描述

我有一个数组，看起来是这样的：

 阵列
（
    [100] =＆GT;排列
        （
            [ROOM_ID] =＆GT; 100
            [名] =＆GT;市中心
        ）    [110] =＆GT;排列
        （
            [ROOM_ID] =＆GT; 110
            [名] =＆GT;咖啡店
            [pin_id] =＆GT; 7146
            [pin_x] =＆GT; 570
            [pin_y] =＆GT; 150
        ）
）
 

我在想，如果有，我可以得到一个特定的值，如果在pin_id关键是有没有办法。因此，例如：

 阵列
（
    [100] =＆GT;排列
        （
            [ROOM_ID] =＆GT; 100
            [名] =＆GT;镇中心＆lt;  - 无pin_id，所以我不需要这个值
        ）    [110] =＆GT;排列
        （
            [ROOM_ID] =＆GT; 110
            [名] =＆GT;咖啡厅＆LT;  - 我要获得此值
            [pin_id] =＆GT; 7146＆LT;  - 既然pin_id关键就在这里
            [pin_x] =＆GT; 570
            [pin_y] =＆GT; 150
        ）
）
 

我一直使用的foreach试过，但它得到复杂的我。我还是很新的使用数组，并没有那么熟悉的术语/功能。

解决方案

 函数SEARCH_KEY（$数组$键）{
    $结果=阵列（）;
    如果（is_array（$阵列））{
        如果（使用isset（$数组[$关键]）及和放大器; $阵列[$关键] == $键）
            $结果[] = $阵列;
        的foreach（$数组作为子阵$）
            $结果= array_merge（$结果，tm_search_key_value（$子数组，$键））;
    }
    返回$结果;
}
 

用法：

SEARCH_KEY（$数组，'pin_id'）;

搜索从多维特定的键，它会返回一个特定键的数组。

I have an array that looks something like this:

Array
(
    [100] => Array
        (
            [room_id] => 100
            [name] => Town Center
        )

    [110] => Array
        (
            [room_id] => 110
            [name] => Coffee Shop
            [pin_id] => 7146
            [pin_x] => 570
            [pin_y] => 150
        )
)

I was wondering if there was a way that I could obtain a specific value, if the "pin_id" key was there. So for example:

Array
(
    [100] => Array
        (
            [room_id] => 100
            [name] => Town Center     <-- No "pin_id" so I DON'T need this value
        )

    [110] => Array
        (
            [room_id] => 110
            [name] => Coffee Shop     <-- I want to OBTAIN this value
            [pin_id] => 7146          <-- Since the "pin_id" key is here
            [pin_x] => 570
            [pin_y] => 150
        )
)

I've tried using foreach, but it gets to complicated for me. I'm still very new with arrays, and not so familiar with the terminology/functions.

解决方案

function search_key( $array, $key ) {
    $results = array();
    if ( is_array( $array ) ) {
        if ( isset( $array[$key] ) && $array[$key] == $key )
            $results[] = $array;
        foreach ( $array as $subarray )
            $results = array_merge( $results, tm_search_key_value( $subarray, $key ) );
    }
    return $results;
}

USAGE:

search_key( $array, 'pin_id');

Search specific KEY from Multidimentional, It will return array of that specific key.

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