Can I get the effect of JSON_NUMERIC_CHECK without JSON? - php

Question

Can i get the effect of JSON_NUMERIC_CHECK without JSON?
i.e. Recrusive replacement of numeric strings to ints or floats.
Example with JSON_NUMERIC_CHECK:
<?php
// some input from somewhre
$data = explode(',', 'abc,7,3.14');
echo "Before:"; var_dump($data);
$data = json_decode(json_encode($data, JSON_NUMERIC_CHECK), TRUE);
echo "After:"; var_dump($data);
But I geuss converting to json and back is slow, is there some other way to get the same result?

Answer 1

You can loop over your strings and cast any numeric value to int or float using the following code:
/**
* Normalize an object, array or string by casting all
* numeric strings it contains to numeric values.
*
* #param array|object|string $data
* #return mixed
*/
function normalize($data) {
if (is_array($data))
return array_map('normalize', $data);
if (is_object($data))
return (object) normalize(get_object_vars($data));
return is_numeric($data) ? $data + 0 : $data;
}
$data = "15,2.35,foo";
$data = normalize(explode(',', $data));
// => [15, 2.35, 'foo']
Hope this helps :)
More efficient way
/**
* Normalize an string or object by casting all
* numeric strings it contains to numeric values.
* Note that it changes the variable directly
* instead of returning a copy.
*
* #param object|string $data
* #return void
*/
function normalizeItem(&$data) {
if (is_object($data)) {
$data = get_object_vars($data);
normalize($data);
$data = (object) $data;
} else {
$data = is_numeric($data) ? $data + 0 : $data;
}
}
/**
* Applies normalizeItem to an array recursively.
*
* #param array &$list
* #return bool
*/
function normalize(&$list) {
return array_walk_recursive($list, 'normalizeItem');
}

Answer 2

You can use array_map() with a callback.
$data = explode(',', 'abc,7,3.14');
$re = array_map(function(&$a) {
return ctype_digit($a) ? intval($a) : $a;
}, $data);
var_dump($re);
https://eval.in/715641