比较php中的数组并将值从一个数组分配给另一个数组

我已经在我的一个项目上工作了几天了，我在这个项目中要做的基本上是比较用户通常在excel中使用的csv文件，每天晚上用php自动执行。 我从CSV的简介数组中获得了这些信息，但我很难将它们组合起来，以便为每本书获得正确的信息，因此下面的示例和问题如下

我有csv文件中的以下数组（array1）：

Array
(
[0] => Array
    (
        [0] => book1
        [1] => description1
        [2] => category1
        [3] => code1
        [4] => editor1
        [5] => 0
        [6] => eur
        [7] => out of stoc
    )

[1] => Array
    (
        [0] => book2
        [1] => description2
        [2] => category2
        [3] => code2
        [4] => editor2
        [5] => 0
        [6] => curr2
        [7] => out of stoc
    )

[2] => Array
    (
        [0] => book3
        [1] => description3
        [2] => category3
        [3] => code3
        [4] => editor3
        [5] => 0
        [6] => curr3
        [7] => out of stoc
    )

[3] => 
)

Array
(
[0] => Array
    (
        [0] => book1
        [1] => description_from_array2
        [2] => category_from_array2
        [3] => code_from_array2
        [4] => editor_from_array2
        [5] => 12
        [6] => eur
        [7] => in stoc
    )

[1] => Array
    (
        [0] => book2
        [1] => description_from_array2
        [2] => category_from_array2
        [3] => code_from_array2
        [4] => editor_from_array2
        [5] => 13
        [6] => eur
        [7] => in stoc
    )

[2] => Array
    (
        [0] => book4
        [1] => description_from_array2
        [2] => category_from_array2
        [3] => code_from_array2
        [4] => editor_from_array2
        [5] => 14
        [6] => usd
        [7] => in stoc
    )

[3] => Array
    (
        [0] => book5
        [1] => description_from_array2
        [2] => category_from_array2
        [3] => code_from_array2
        [4] => editor_from_array2
        [5] => 16
        [6] => usd
        [7] => in stoc
    )

)

以及第二个csv文件中的另一个阵列（array2）：

Array
(
[0] => Array
    (
        [0] => book1
        [1] => description1
        [2] => category1
        [3] => code1
        [4] => editor1
        [5] => 0
        [6] => eur
        [7] => out of stoc
    )

[1] => Array
    (
        [0] => book2
        [1] => description2
        [2] => category2
        [3] => code2
        [4] => editor2
        [5] => 0
        [6] => curr2
        [7] => out of stoc
    )

[2] => Array
    (
        [0] => book3
        [1] => description3
        [2] => category3
        [3] => code3
        [4] => editor3
        [5] => 0
        [6] => curr3
        [7] => out of stoc
    )

[3] => 
)

Array
(
[0] => Array
    (
        [0] => book1
        [1] => description_from_array2
        [2] => category_from_array2
        [3] => code_from_array2
        [4] => editor_from_array2
        [5] => 12
        [6] => eur
        [7] => in stoc
    )

[1] => Array
    (
        [0] => book2
        [1] => description_from_array2
        [2] => category_from_array2
        [3] => code_from_array2
        [4] => editor_from_array2
        [5] => 13
        [6] => eur
        [7] => in stoc
    )

[2] => Array
    (
        [0] => book4
        [1] => description_from_array2
        [2] => category_from_array2
        [3] => code_from_array2
        [4] => editor_from_array2
        [5] => 14
        [6] => usd
        [7] => in stoc
    )

[3] => Array
    (
        [0] => book5
        [1] => description_from_array2
        [2] => category_from_array2
        [3] => code_from_array2
        [4] => editor_from_array2
        [5] => 16
        [6] => usd
        [7] => in stoc
    )

)

我想知道如何从array2 intro array1中获取array1书籍的值。 例：

---

请相信我，对于这个问题的任何帮助都将不胜感激

@Rasvan没问题，很高兴我能帮上忙。我能再问你一个问题吗？@Rasvan当然，如果不是一个简短的问题，它可能更适合作为一个新问题发布。但是，因为我不是程序员，我也没有完成这个项目的逻辑技能，我真的需要帮助这个项目。我能让你对一个涉及你的商业提案感兴趣吗？这真的不是一个复杂的项目，但因为我缺乏必要的开发技能，这是非常累累，而且很难。

//Add keys to array 2 to aid lookup
$array2Tmp = array();
foreach($array2 as $item){
    $array2Tmp[$item[0]] = $item;
}

$array3 = array();
foreach($array1 as $item){
    //Use item from second array if it exists
    if(array_key_exists($item[0],$array2Tmp)){
       $array3[] = $array2Tmp[$item[0]];
     }else{
       $array3[] = $item;
     }
}