- var_dump: documentation ( source)
- filter_var: documentation ( source)
<?php
var_dump(filter_var('0 EUR', FILTER_SANITIZE_NUMBER_FLOAT, FILTER_FLAG_ALLOW_FRACTION));
var_dump(filter_var('0', FILTER_SANITIZE_NUMBER_FLOAT));
var_dump(filter_var('EUR', FILTER_SANITIZE_NUMBER_FLOAT));
var_dump(filter_var('0.00 EUR', FILTER_SANITIZE_NUMBER_FLOAT));
var_dump(filter_var('100.30 EUR', FILTER_SANITIZE_NUMBER_FLOAT, FILTER_FLAG_ALLOW_FRACTION));