PHP数组：通过索引获取值，其中

Question

I have this PHP array:

$statuses = array(
  'delivery-ongoing' => array("status" => "at-10", "traffic" => "FCL", "type" => "export"),
  'delivered' => array("status" => "at-13", "traffic" => "FCL", "type" => "export"),
  'delivery-ongoing' => array("status" => "00--00", "traffic" => "FCL", "type" => "import"),
  'return-to-ongoing' => array("status" => "to-04", "traffic" => "FCL", "type" => "import"),
  'delivered' => array("status" => "at-13", "traffic" => "FCL", "type" => "import")
);

I have to select status by key "delivery-ongoing" where type = "import"

I can play with the array structure since is a constant within my class.

I tried

$statuses['delivery-ongoing']['status']

How do I get the right status for type = "import"

Is there a sort of loop I have to do or there is another way to do this?

Answer 1

You can use array_filter

$filtered = array_filter($statuses, function($value, $key) {
    return ($key == 'delivery-ongoing' && $value['type'] == 'import');
}, ARRAY_FILTER_USE_BOTH);

print_r($filtered);

Also, as it has been suggested in the comments, you can re-name your keys, maybe by appending an ID after the status.

Eq:

'delivery-ongoing-101' => array("status" => "at-10", "traffic" => "FCL", "type" => "export"),

Answer 2

There are several problems with this array:

1- There's an error in a parenthesis that is closed too early at this line:

'return-to-ongoing' => array("status" => "to-04", "traffic" => "FCL"), "type" => "import",

2- If you define the same key two times on the same array, you won't be able to access the first element that was defined with this key. If you use a debugger, you will see that only 3 elements are available in your array, cause there are more than one that share the same key and only the last one is saved.

But to get the value that you are looking for, you can use this loop:

foreach ($statuses as $key => $value) {

    if($key == 'delivery-ongoing' && $value['type'] == 'import'){

        $result = $value['status'];

        break;
    }
}

The status for the type import is available at $result after the loop ends.

Answer 3

Your $statuses must have the following structure:

$statuses = array(
  'delivery-ongoing' => array(
    array("status" => "at-10", "traffic" => "FCL", "type" => "export"), 
    array("status" => "00--00", "traffic" => "FCL", "type" => "import")
  ),
  'delivered' => array(
    array("status" => "at-13", "traffic" => "FCL", "type" => "export"), 
    array("status" => "at-13", "traffic" => "FCL", "type" => "import")
    ),
  'return-to-ongoing' => array(array("status" => "to-04", "traffic" => "FCL", "type" => "import")),
);

Now, you can do what you want to do by doing:

 function filter_by_value ($array, $index, $value){ 
    if(is_array($array) && count($array)>0)  
    { 
        foreach(array_keys($array) as $key){ 
            $temp[$key] = $array[$key][$index]; 

            if ($temp[$key] == $value){ 
                $newarray[$key] = $array[$key]; 
            } 
        } 
      } 
  return $newarray; 
} 

$imported = filter_by_value($statuses['delivery-ongoing'], 'type', 'import');

print_r($imported);