# Field Criterion

The [`Field` Search Criterion](https://doc.ibexa.co/en/latest/api/php_api/php_api_reference/classes/Ibexa-Contracts-Core-Repository-Values-Content-Query-Criterion-Field.html) searches for content based on the content of one of its fields.

## Arguments

- `target` - string representing the identifier of the field to query
- `operator` - operator constant (IN, EQ, GT, GTE, LT, LTE, LIKE, BETWEEN, CONTAINS)
- `value` - the value to query for

The `LIKE` operator works together with wildcards (`*`). Without a wildcards its results are the same as for the `EQ` operator.

The `CONTAINS` operator works with collection fields like the Country field type, enabling you to retrieve results when the query value is one of the values of the collection. Querying for a collection with the `EQ` operator returns result only when the whole collection equals the query values.

## Limitations

The `Field` Criterion isn't available in [Repository filtering](https://doc.ibexa.co/en/latest/search/search_api/#repository-filtering).

## Example

### PHP

```
$query->query = new Criterion\Field('name', Criterion\Operator::CONTAINS, 'Platform');
```

### REST API

**XML**

```
<Query>
    <Filter>
        <Field>
            <name>name</name>
            <operator>CONTAINS</operator>
            <value>Platform</value>
        </FieldCriterion>
    </Filter>
</Query>
```

**JSON**

```
{
    "Query": {
        "Filter": {
            "Field": {
                "name": "name",
                "operator": "CONTAINS",
                "value": "Platform"
            }
        }
    }
}
```

## Use case

You can use the `Field` Criterion to search for articles that contain the word "featured":

```
$query = new LocationQuery();
$query->query = new Criterion\LogicalAnd([
        new Criterion\ContentTypeIdentifier('article'),
        new Criterion\Field('name', Criterion\Operator::CONTAINS, 'Featured')
    ]
);
```