Online PHP editor | refs for UGVe9

<?php $testValues = [ 'positives' => ['121', '231.45', '77,65', '9.456,77', '4,255.66'], // should pass 'negatives' => ['-121', '-231.45', '-77,65', '-9.456,77', '-4,255.66'], // should pass 'gibberish' => ['231.45a', '7a7,65', 'a9.456,77', '4,255.66a', 'aaaaaa'], // should fail ]; function customIsNumeric(string $value): bool { return is_numeric(str_replace(['.', ','], '', $value)); } foreach ($testValues as $category => $values) { var_dump($category); foreach ($values as $value) { var_dump(customIsNumeric($value)); } }