PHP - Execute function on an array value

Question

I have this array:

array:2 [▼
  0 => array:3 [▼
    "time" => 7780
    "name" => "John A. Doe"
    "photo" => "johndoe.png"
  ]
  1 => array:3 [▼
    "time" => 49800
    "name" => "Jane B. Doe"
    "photo" => "janedoe.png"
  ]
]

the time value is seconds, my question is how can i loop through the array so that I can run a function like:

"time" => $this->secondsToHumanReadable(49800)

My function secondsToHumanReadable is tested and working fine, i just want it to insert on the time value inside my array result.

UPDATE:

Desired output will be:

array:2 [▼
      0 => array:3 [▼
        "time" => '2 days, 1 hour, 3 minutes, 45 seconds'
        "name" => "John A. Doe"
        "photo" => "johndoe.png"
      ]
      1 => array:3 [▼
        "time" => '3 hour, 15 minutes, 20 seconds'
        "name" => "Jane B. Doe"
        "photo" => "janedoe.png"
      ]
    ]

Possible duplicate of [How to get an array of specific "key" in multidimensional array without looping](https://stackoverflow.com/questions/7994497/how-to-get-an-array-of-specific-key-in-multidimensional-array-without-looping) — Martijn, Mar 27 '19 at 13:16
@Martijn, I don't think that is a duplicate because the OP wants a loop. — reisdev, Mar 27 '19 at 13:16
@kapitan Do you want to modify the original array, or produce a new one? — programmer-man, Mar 27 '19 at 13:22
@programmer-man - thank you for asking, my question was updated. my answer to your question is either, i just want the easiest solution for this. anyways, someone already gave the answer below. thank you for your time. — kapitan, Mar 27 '19 at 13:29

Christopher Francisco · Accepted Answer · 2019-03-27T13:21:29.290

5

Using array_map()

$new_array = array_map(function($item) use ($this) {
  $item['time'] = $this->secondsToHumanReadable($item['time']);
  return $item;
}, $my_array);

Benefit of using array_map() is that the returned array is a new array, so you don't mutate your initial array. It's usually a good practice not to mutate data structures

edited Mar 27 '19 at 13:21

answered Mar 27 '19 at 13:18

Christopher Francisco

15,672
28
94
206

my bad, I missed a dollar sign. Try again – Christopher Francisco Mar 27 '19 at 13:21
ill try this, ill be back in a sec – kapitan Mar 27 '19 at 13:22
2

@Ianis - No need of `use` because `$item` references the current looped element of the second paramter `$my_array`. – Kévin Bibollet Mar 27 '19 at 13:22
@iArcadia if used inside of a class yes, my bad – Ianis Mar 27 '19 at 13:23
@Ianis - Nope, that's me. I read `$item` instead of `$this` in your deleted comment. You may have correct! – Kévin Bibollet Mar 27 '19 at 13:25
it worked! i just removed the `use ($this)` as suggested by iArcadia, thanks @christopher!!! – kapitan Mar 27 '19 at 13:25
Glad it worked! don't forget to mark it as the accepted answers so other users can benefit too! :) – Christopher Francisco Mar 27 '19 at 13:29
I suggest renaming the key so something like 'humantime'. That way, you keep your original value, which you might need later on (maybe not at this point at time, but *at some point*). – Martijn Mar 27 '19 at 13:29

reisdev · Answer 2 · 2019-03-27T13:33:51.147

0

You could use a foreach, as @u_mulder said.


// Copying the original array
$result = $array;

foreach($result as $item) {
    $item["time"] = $this->secondsToHumanReadable($item["time"]);
}

print_r($result);

edited Mar 27 '19 at 13:33

answered Mar 27 '19 at 13:18

reisdev

3,215
2
17
38

2

This will mutate the `$array` array. It's usually a good practice to work with immutable values. – Christopher Francisco Mar 27 '19 at 13:19
4

`$item in $array` is __not__ php syntax. – u_mulder Mar 27 '19 at 13:19
foreach syntax is : foreach($list as $key => $item) $key can be omitted but if you want to change the original array you shoud use $list[$key] – Ianis Mar 27 '19 at 13:20
2

And updated code will work with copy of array and will __not update__ original array. – u_mulder Mar 27 '19 at 13:21
@ChristopherFrancisco, I agree about the immutability. Updated the code, to let the `foreach` as an option for other people – reisdev Mar 27 '19 at 13:34

score 0 · Answer 3 · answered Mar 27 '19 at 13:19

You could use a foreach but with references:

$data = [
  [
    'time' => time()
  ],

  [
    'time' => time() - 5000
  ]
];

foreach ($data as &$datum) {  
  $datum['time'] = date('d/m/Y', $datum['time']);
}

print_r($data);

Output

Array
(
    [0] => Array
        (
            [time] => 27/03/2019
        )

    [1] => Array
        (
            [time] => 27/03/2019
        )

)

Live Example

Repl

sc0rp1on · Answer 4 · 2019-03-27T13:32:34.633

0

You can try this

array(
  "time" => function($foo){return $foo;},
    "name" => "John A. Doe",
    "photo" => "johndoe.png"
);

edited Mar 27 '19 at 13:32

answered Mar 27 '19 at 13:25

sc0rp1on

348
1
15

1

This part of the question is just a representation of the expected result, not actually php code. – reisdev Mar 27 '19 at 13:26
I just meant that you can denote the function in the array. – sc0rp1on Mar 27 '19 at 13:30

PHP - Execute function on an array value

4 Answers4