Replace empty entry with previous element in associative array

Question

I have following $data array

Array
(
    [0] => Array
        (
            [match_day] => MD27
            [price] => 95.33
        )
    [1] => Array
        (
            [match_day] => MD28
            [price] => 97.82
        )
    [2] => Array
        (
            [match_day] => MD29
            [price] => 
        )
    [3] => Array
        (
            [match_day] => MD30
            [price] => 
        )
    [4] => Array
        (
            [match_day] => MD31
            [price] => 
        )
)

Now, my requirements is - replace empty entry of price attribute with previous price attribute.

Loop through with one variable which you assign the price if it isn't empty, otherwise you use the variable to assign it to the price. Done. — Rizier123
– Rizier123, Commented Mar 29, 2016 at 10:47
Use the foreach() function in PHP to loop through your array. — node_modules
– node_modules, Commented Mar 29, 2016 at 10:48

Ali · Accepted Answer · 2016-03-29 10:55:45Z

2

No need to go for for loop You can try following code:

$result = [];
array_walk($data, function($v,$k) use (&$result){
    $result[$k] = $v;
    if(!isset($result[$k]['price']) || $result[$k]['price'] == null){
        $result[$k]['price'] = $result[$k - 1]['price'];
    }
});

print_r($result);

Working Demo is Here

answered Mar 29, 2016 at 10:55

Ali

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Comments

Reversal · Accepted Answer · 2016-03-29 10:49:37Z

0

Perform a foreach loop an your array, store previous price value and if the current item has empty price, use previous to replace it. Example:

$previous = 0;
foreach($data AS $key => $row) {
  if (empty($row['price']))
    $data[$key]['price'] = $previous;
  else
    $previous = $row['price'];
}

answered Mar 29, 2016 at 10:49

Reversal

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