【PHP】配列の中身をintに置き換える

<?php

$arr =  [1,2,3,'あああ','00456','123abc',-3,' '];

$arr = array_map('intval', $arr);

var_dump($arr);



function convertArrayValues($array) {
    foreach ($array as $key => $value) {
        if (is_numeric($value)) {
            $array[$key] = (int)$value;
        } else if (is_string($value)) {
            $array[$key] = htmlspecialchars($value, ENT_QUOTES, 'UTF-8');
        }
    }
    return $array;
}

// 使用例
$array = ['1', '2', 'hello', '3', '<script>alert("xss");</script>','1a',0 ];
$result = convertArrayValues($array);

print_r($result);


function convertArrayValues($array) {
    foreach ($array as $key => $value) {
        if (is_array($value)) {
            $array[$key] = convertArrayValues($value);
        } else if (is_numeric($value) && $value !== '0') {
            $array[$key] = (int)$value;
        } else if (is_string($value)) {
            $array[$key] = htmlspecialchars($value, ENT_QUOTES, 'UTF-8');
        }
    }
    return $array;
}

// 使用例
$array = ['1', '2', 'hello', '3', '<script>alert("xss");</script>', '0', ['4', '5', '<img src="x">']];
$result = convertArrayValues($array);

print_r($result);


?>

#出力結果

array(8) {
  [0]=>
  int(1)
  [1]=>
  int(2)
  [2]=>
  int(3)
  [3]=>
  int(0)←あああ
  [4]=>
  int(456)←00456
  [5]=>
  int(123)←123abc
  [6]=>
  int(-3)
}