PHP数组，如何访问键和值 [英] PHP array's, how to access keys and values

问题描述

尝试学习多维数组，但似乎在访问它们时经常遇到困难。我仍然不了解如何使用索引，键，值访问它们。

Trying to learn multidimensional arrays but seem to constantly struggle with accessing them. I still have not got grasps of how you access them using index, keys, values.

我如何获得实际的标题一词及其价值？

How do I get to the actual word "Title" and it's value?

这里我有一个

$shop = array( array( "Title" => "rose", 
                      "Price" => 1.25,
                      "Number" => 15 
                    ),
               array( "Title" => "daisy", 
                      "Price" => 0.75,
                      "Number" => 25,
                    ),
               array( "Title" => "orchid", 
                      "Price" => 1.15,
                      "Number" => 7 
                    )
             );

Which prints a structure such as this:

Array
(
    [0] => Array
        (
            [Title] => rose
            [Price] => 1.25
            [Number] => 15
        )

    [1] => Array
        (
            [Title] => daisy
            [Price] => 0.75
            [Number] => 25
        )

    [2] => Array
        (
            [Title] => orchid
            [Price] => 1.15
            [Number] => 7
        )

)

echo $shop[0][0][0]; //I Expect "rose" but I get "Undefined offset: 0"
echo $shop['Price']; //I expect 1.25 but I get "Undefined index: Price"

foreach($shop as $key=>$value)
{
echo $key; //I expect the key values "Title/Price/Number" instead I get Index numbers 0 1 2
echo $value; //I expect all values of keys e.g. "rose",1.25,15/"daisy",0.75,25/"orchid",1.15,7 Instead I get Array to string conversion error
}

我想做的是从shop数组中获取所有标题和值，并将其放入一个新的$ x = array（）;数组中。然后从其他数组中获取汽车钥匙/值，并将其组合在一起。

What I am trying to do, is take all the title and value from the shop array, and put it into a new array called $x = array(); and then take a car key/value from a different array and combine them together.

所以新数组最终看起来像这样：

so the new array ends up looking like this:

Array
(
    [0] => Array
        (
            [Title] => rose //from $shop array
            [Car] => Mercedez //from $car array
        )

    [1] => Array
        (
            [Title] => daisy //from $shop array
            [Car] => Ford //from $car array
        )

    [2] => Array
        (
            [Title] => orchid //from $shop array
            [Car] => Bentley //from $car array
        )

)

还可以访问键 title的实际名称而不是索引号吗？

Also is there a way to access the actual name of the key "title" and not a index number?

推荐答案

尝试一下-

$newarray = array();
foreach($shop as $key=>$value) {
    $newarray[$key]['Title'] = $value['Title'];
    $newarray[$key]['Number'] = $value['Number'];
}
echo "<pre>";print_r($newarray);

在这里， $ newarray 将为您提供输出

Here, $newarray will give you output like this.

Array
(
    [0] => Array
        (
            [Title] => rose
            [Number] => 15
        )

    [1] => Array
        (
            [Title] => daisy
            [Number] => 25
        )

    [2] => Array
        (
            [Title] => orchid
            [Number] => 7
        )

)

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