在嵌套的php数组中搜索$代码

Question

Stack Overflowers,

Having attempted to dive into PHP, I appear to have got stuck; I have a pre-generated array where var_dump($codes) is as follows:

array(2) {
  [0]=>
  array(3) {
    ["code"]=>
    string(5) "01332"
    ["description"]=>
    string(19) "Derby Discount Code"
    ["discount_amount"]=>
    string(2) "15"
  }
  [1]=>
  array(3) {
    ["code"]=>
    string(5) "01283"
    ["description"]=>
    string(25) "South Derby Discount Code"
    ["discount_amount"]=>
    string(2) "20"
  }
}

I have form which _POSTs a variable of $code and would like to search in the array above to see if there is a match for $code in one of the nested arrays above. If so, I would like to be able to get the discount amount and description as individual variables.

So far I have the following:

if(in_array($code, $codes)) { 
    //apply discount code using $discount_amount
}

where $codes outputs the array posted at the top of this question.

Answer 1

Quick little function you can use:

function get_discount($arr, $code) {
    foreach($arr as $item) {
        if($item["code"] == $code) {
            return $item["discount_amount"];
        }
    }

    return NULL;
}

Where $arr is your array (that you dumped) and $code is the code you're checking for. Should return the discount, or NULL.

Haven't had a chance to test it (typed it up here), but it should work as intended.