Question

我有两个阵列。第一个是多维数组。第二个数组包含键和值对。现在我的目标是我想从第一个数组值检查每个数组的second index，以检查第二个数组中的值是否存在？如果是，则第一个数组值需要替换为第二个数组值。

$first_array = Array
(
    [0] => Array
        (
            [0] => 2012/12
            [1] => 
            [2] => "SI"
            [3] => 
            [4] => 
            [5] => 
   )
[1] => Array
        (
            [0] => 2012/12
            [1] => 
            [2] => "MB"
            [3] => 
            [4] => 
            [5] => 
   )
)


$second_array = array(
["MB"] => "WE",
["SI"] => "SA",
["SO"] => "SA",
)

我的输出应该是这样的

$first_array = Array
    (
        [0] => Array
            (
                [0] => 2012/12
                [1] => 
                [2] => "SA"
                [3] => 
                [4] => 
                [5] => 
       )
    [1] => Array
            (
                [0] => 2012/12
                [1] => 
                [2] => "WE"
                [3] => 
                [4] => 
                [5] => 
       )
    )

Answer 1

foreach怎么样？

foreach($first_array as &$v)
{
    //$v[2] = isset($second_array[$v[2]]) ? $second_array[$v[2]] : $v[2];

    if(isset($second_array[$v[2]))
        $v[2] = $second_array[$v[2]];
}

print_r($first_array);

Answer 2

使用简单的foreach循环和if

Try this code snippet here

<?php
ini_set('display_errors', 1);
$first_array = Array
(
    0 => Array
        (
            0 => "2012/12",
            1 => "",
            2 => "SI",
            3 => "",
            4 => "",
            5 => "",
   ),
1 => Array
        (
            0 => "2012/12",
            1 => "",
            2 => "MB",
            3 => "",
            4 => "",
            5 => "",
   )
);


$second_array = array(
"MB" => "WE",
"SI" => "SA",
"SO" => "SA",
);

foreach($first_array as $key1 => $data)
{
    if(isset($second_array[$data[2]]))
    {
        $first_array[$key1][2]=$second_array[$data[2]];
    }

}
print_r($first_array);

将第一个数组值与第二个数组键进行比较并替换值

2 个答案: