array_map for multidimensional arrays

Question

I am trying to find a solution to using array_map('mysql_real_escape_string', $data); on multidimensional arrays, If $data is multidimensional, php returns an error. cheers

Answer 1

$array = array( array('A' => "Hello", 'B' => "World"),
                array('A' => "Goodnight", 'B' => "Vienna")
              );

function myFunc(&$item, $key) {
    $item = mysql_real_escape_string($item);
}

array_walk_recursive($array,'myFunc');

var_dump($array);

Answer 2

You can also use minwork/array to easily map any multidimensional array.

Biggest advantage of this solution over native functions is that you can map multidimensional arrays with various nesting depth also accessing their keys, for example:

$array = [
    1 => [
        2 => 'a',
        3 => 'b',
        4 => [
            5 => 'c',
        ],
    ],
    'test' => 'd',
];

$callback = function ($keys, $value) {
    return implode('.', $keys) . " -> {$value}";
}

Arr::map($array, $callback, Arr::MAP_ARRAY_KEYS_ARRAY_VALUE) ->
[
    1 => [
        2 => '1.2 -> a',
        3 => '1.3 -> b',
        4 => [
            5 => '1.4.5 -> c',
        ],
    ],
    'test' => 'test -> d',
]

In your case you can simply apply mysql_real_escape_string function (without modifying input array) to every element like this (no matter how deeply each element is nested)

$escapedData = Arr::map($data, function ($value) {
    return mysql_real_escape_string($value);
}, Arr::MAP_ARRAY_VALUE_KEYS_LIST);