In
February 3, 2026 ยท View on GitHub
In(mixed $haystack)
Validates if the input is contained in a specific haystack.
For strings:
v::in('lorem ipsum')->assert('ipsum');
// Validation passes successfully
For arrays:
v::in(['lorem', 'ipsum'])->assert('lorem');
// Validation passes successfully
Message template for this validator includes {{haystack}}.
Templates
In::TEMPLATE_STANDARD
| Mode | Template |
|---|---|
default | {{subject}} must be in {{haystack}} |
inverted | {{subject}} must not be in {{haystack}} |
Template placeholders
| Placeholder | Description |
|---|---|
haystack | |
subject | The validated input or the custom validator name (if specified). |
Categorization
- Arrays
- Comparisons
- Strings
Changelog
| Version | Description |
|---|---|
| 3.0.0 | Case-insensitive comparison removed |
| 0.3.9 | Created |