检查是否在一个PHP多维数组存在数组值 [英] Checking if array value exists in a PHP multidimensional array

问题描述

我有以下多维数组：

 阵列（[0] =＆GT;数组
         （[ID] =＆GT; 1
           [名] =＆GT;约拿
           [要点] =＆GT; 27）
        [1] =＆GT;排列
         （[ID] =＆GT; 2
           [名] =＆GT;标记
           [要点] =＆GT; 34）
      ）
 

我目前使用的是的foreach 循环来提取数组中的值：

 的foreach（$结果为$关键=＆GT; $分）
{
    ...
}
 

但我不知道我怎么看阵列内的值是否已经存在。

因此​​，举例来说，如果我想另一组添加到数组，但id为 1 （这样的人是约拿）和他们的成绩是5，可我添加5已创建数组值 ID 0 而不是创建一个新的数组值？

所以循环完成后，阵列将是这样的：

 阵列（[0] =＆GT;数组
         （[ID] =＆GT; 1
           [名] =＆GT;约拿
           [要点] =＆GT; 32）
        [1] =＆GT;排列
         （[ID] =＆GT; 2
           [名] =＆GT;标记
           [要点] =＆GT; 34）
      ）
 

解决方案

什么循环您的数组，检查每一个项目，如果它是 ID 是你是我的唯一找谁？

  $发现= FALSE;
的foreach（$ your_array为$关键=＆GT; $数据）{
    如果（$数据['身份证'] == $ the_id_youre_lloking_for）{
        //该项目已发现= GT;添加新的指向现有
        $数据['点'] + = $ the_number_of_points;
        $找到= TRUE;
        打破; //无需环路了，因为我们已经找到了项目=＆GT;退出循环
    }
}如果（$找到=== FALSE）{
    //你要找的人的ID没有被发现，
    //这意味着相应的项目是不是已经present阵列中
    // =＆GT;添加一个新的项目到数组
}
 

I have the following multidimensional array:

Array ( [0] => Array 
         ( [id] => 1 
           [name] => Jonah 
           [points] => 27 )
        [1] => Array 
         ( [id] => 2 
           [name] => Mark 
           [points] => 34 )
      )

I'm currently using a foreach loop to extract the values from the array:

foreach ($result as $key => $sub)
{
    ...
}

But I was wondering how do I see whether a value within the array already exists.

So for example if I wanted to add another set to the array, but the id is 1 (so the person is Jonah) and their score is 5, can I add the 5 to the already created array value in id 0 instead of creating a new array value?

So after the loop has finished the array will look like this:

Array ( [0] => Array 
         ( [id] => 1 
           [name] => Jonah 
           [points] => 32 )
        [1] => Array 
         ( [id] => 2 
           [name] => Mark 
           [points] => 34 )
      )

解决方案

What about looping over your array, checking for each item if it's id is the one you're looking for ?

$found = false;
foreach ($your_array as $key => $data) {
    if ($data['id'] == $the_id_youre_lloking_for) {
        // The item has been found => add the new points to the existing ones
        $data['points'] += $the_number_of_points;
        $found = true;
        break; // no need to loop anymore, as we have found the item => exit the loop
    }
}

if ($found === false) {
    // The id you were looking for has not been found, 
    // which means the corresponding item is not already present in your array
    // => Add a new item to the array
}

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