/**
* Cast a value to float.
*
* @static
*
* @param mixed $value Value to cast.
* @param bool $array2null (Optional) Whether to return null for an array or to cast the
* individual values within the array to the chosen type.
* @param bool $allow_empty (Optional) Whether to allow empty arrays. Only has effect
* when $array2null = false.
*
* @return float|array|null
*/
function _float($value, $array2null = true, $allow_empty = true)
{
if (is_float($value)) {
return $value;
} else {
if ($array2null === false && is_array($value)) {
return CastToType::recurse($value, '_float', $allow_empty);
} else {
if (is_scalar($value) && (is_numeric(trim($value)) && floatval($value) == trim($value))) {
return floatval($value);
} else {
if (is_object($value) && get_class($value) === 'SplFloat') {
if ((double) $value == $value) {
return (double) $value;
} else {
return null;
}
} else {
if (is_object($value) && (get_class($value) === 'SplBool' || get_class($value) === 'SplInt' || get_class($value) === 'SplString')) {
return CastToType::spl_helper($value, '_float', $array2null, $allow_empty);
}
}
}
}
}
return null;
}
