respect-validation/docs/validators/IterableVal.md
Alexandre Gomes Gaigalas 16148e9593 Standardize and improve validation message templates
- Remove redundant "valid" prefix:
   Date, DateTime, DateTimeDiff, Domain, Email, Iban, Imei, Ip, Isbn, Json, LanguageCode, LeapDate, LeapYear, Luhn, MacAddress, NfeAccessKey, Nif, Nip, Pesel, Phone, Pis, PolishIdCard, PostalCode, Roman, Slug, Tld, Url, Uuid, Version.

 - Remove redundant "value" suffix
   ArrayVal, BoolVal, Countable, FloatVal, IntVal, IterableVal, NumericVal, ScalarVal, StringVal.

 - Standardize "consist only of" phrasing
   Alnum, Alpha, Cntrl, Consonant, Digit, Graph, Lowercase, Printable, Punct, Space, Spaced, Uppercase, Vowel, Xdigit.

 - Improve file accessibility messages
   Directory, Executable, File, Image, Readable, SymbolicLink, Writable.

 - Improve grammar and article usage
   CreditCard, Extension, Mimetype, Regex, Size.
2026-02-03 19:58:55 +00:00

70 lines
2 KiB
Markdown

<!--
SPDX-License-Identifier: MIT
SPDX-FileCopyrightText: (c) Respect Project Contributors
SPDX-FileContributor: Alexandre Gomes Gaigalas <alganet@gmail.com>
SPDX-FileContributor: Henrique Moody <henriquemoody@gmail.com>
-->
# IterableVal
- `IterableVal()`
Validates whether the input is an iterable value, in other words, if you can iterate over it with the [foreach][] language construct.
```php
v::iterableVal()->assert([]);
// Validation passes successfully
v::iterableVal()->assert(new ArrayObject());
// Validation passes successfully
v::iterableVal()->assert(new stdClass());
// Validation passes successfully
v::iterableVal()->assert('string');
// → "string" must be iterable
```
## Note
This validator doesn't behave as PHP's [is_iterable()][] function because it considers that you can iterate over any object.
## Templates
### `IterableVal::TEMPLATE_STANDARD`
| Mode | Template |
| ---------: | :------------------------------- |
| `default` | {{subject}} must be iterable |
| `inverted` | {{subject}} must not be iterable |
## Template placeholders
| Placeholder | Description |
| ----------- | ---------------------------------------------------------------- |
| `subject` | The validated input or the custom validator name (if specified). |
## Categorization
- Types
## Changelog
| Version | Description |
| ------: | :------------------------------------------- |
| 3.0.0 | Templates changed |
| 3.0.0 | Renamed from `IterableType` to `IterableVal` |
| 1.0.8 | Renamed from `Iterable` to `IterableType` |
| 1.0.0 | Created as `Iterable` |
## See Also
- [ArrayType](ArrayType.md)
- [ArrayVal](ArrayVal.md)
- [Countable](Countable.md)
- [Each](Each.md)
- [Instance](Instance.md)
- [IterableType](IterableType.md)
[is_iterable()]: https://www.php.net/is_iterable
[foreach]: http://php.net/foreach