- var_dump: documentation ( source)
- array_search: documentation ( source)
- filter_var: documentation ( source)
- str_split: documentation ( source)
<?php
$a = str_split('23456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz');
var_dump(array_search('0', $a, false));
var_dump(filter_var(
false,
FILTER_SANITIZE_NUMBER_FLOAT,
FILTER_FLAG_ALLOW_FRACTION
));
var_dump(bcadd('3', ''));