- var_export: documentation ( source)
- preg_replace: documentation ( source)
<?php
$array = [10 => 11.22, 20 => 22.33, 30 => 33.44];
//$array = [];
echo preg_replace(
['/^array \(\s+/', '/,?\R?\)$/', '/$\R /m'],
['[', ']', ' '],
var_export($array, true)
);