- var_dump: documentation ( source)
- is_numeric: documentation ( source)
- explode: documentation ( source)
<?php
var_dump(verify(12.4444));
function verify($number)
{
if (!$number || !is_numeric($number)) {
return true;
}
list(, $decimal) = explode('.', $number);
if (strlen($decimal) != 4) {
return false;
}
return true;
}