Use of Multidimentional array

[subhomoy]

hello everybody

 

I have an multidimentional array and i want to update it programitically as per required..

 

The code is sown below...

$array =
    Array
    (
    [10/3/14] => Array
        (
            [UK] => 1
            [US] => 5
        )

    [11/3/14] => Array
        (
            [UK] => 5
            [US] => 10
        )

    [12/3/14] => Array
        (  [UK] => 15
           [US] => 20
        )

    [13/3/14] => Array
        (
           [UK] => 25
           [US] => 30
        )
    }

I want to check the server date with the dates present in the array as the [key] and if it matches, i want to change the values of that [key]...

-----------------------------------------------------------------------------------------------------------

example

 

let date = 10/3/14

if it matches in the array, then only i want to change the value of US to 100...

-----------------------------------------------------------------------------------------------------------

It should be done dynamically...

 

Any help will be greatly appreciated... Thank u in advance...

 

[Rifts]

if(in_array($newdate,$array)){

  //found date, change value

  $array[$newdate]['US'] = 100;

} else {

  //dont chanage not in array

}

[kicken]

in_array checks the values, not the keys. To check the key you can use either array_key_exists or isset.

 

$date='10/3/14';
if (isset($array[$date])){
   $array[$date]['US'] = 100;
}

[Psycho]

Using isset() in this scenario is probably fine, but it can cause problems when using it in some scenarios to see if a specific array key exists. The manual for array_key_exists() even includes a specific statement about the two

 

 

isset() does not return TRUE for array keys that correspond to a NULL value, while array_key_exists() does.

I actually got tripped up by this before.

 

Although isset() would work in this specific scenario, in the interest of good programming practices, I think array_key_exists() would be appropriate.

 

Building upon Kicken's solution, you can build a function to do this:

function updateArray(&$sourceArray, $date, $country, $value)
{
    //Check if date exists in source array
    if(!array_key_exists($date, $sourceArray))
    {
        //Date not found
        return false;
    }
    //Update value
    $sourceArray[$date][$country] = $value;
    return true;
}

//Usage
updateArray($array, '10/3/14', 'US', 100);

Edited March 12, 2014 by Psycho

[subhomoy]

Thanks @ Psycho... It works fine.... Thanks for da help...