Using array_map() in a Programmer's Daily Life. PHP Review #7

This article won’t be very long, but it will definitely be useful enough to serve as a good reference for future decisions. Is it worth using array_map? Definitely yes, if you need to perform some mutation operations on individual elements. For example, it can be:

building subarrays from various values

php > var_dump(array_map(static fn ($value) => ['numeric_string' => $value], ['zero','one','two','three']));
array(4) {
  [0]=>
  array(1) {
    ["numeric_string"]=>
    string(4) "zero"
  }
  [1]=>
  array(1) {
    ["numeric_string"]=>
    string(3) "one"
  }
  [2]=>
  array(1) {
    ["numeric_string"]=>
    string(3) "two"
  }
  [3]=>
  array(1) {
    ["numeric_string"]=>
    string(5) "three"
  }
}

extracting values from another array and converting them to something else

$ids = array_map(static fn ($id) => ['id' => $id], array_values($ids));

returning a new list of values with changed values, without modifying the old list

$newArray = array_map(static fn ($item) => str_replace('"','""',$item), $oldArray);

You can multiply the examples, but the most useful ones can be found here: link to PHP documentation

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