- array_map: documentation ( source)
- var_dump: documentation ( source)
- explode: documentation ( source)
- array_walk: documentation ( source)
<?php
$string = "1,2,3";
$array = explode(',', $string);
var_dump($array);
echo "\n---\n";
array_walk($array, function(int &$int){;});
var_dump($array);
echo "\n---\n";
var_dump(
array_map(function(int $i){ return $i; }, explode(',', $string))
);
echo "\n---\n";
var_dump(
array_map(fn(int $i) => $i, explode(',', $string))
);