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## Codeception\Util\JsonType
JsonType matches JSON structures against templates.
You can specify the type of fields in JSON or add additional validation rules.
JsonType is used by REST module in `seeResponseMatchesJsonType` and `dontSeeResponseMatchesJsonType` methods.
Usage example:
```php
<?php
$jsonType = new JsonType(['name' => 'davert', 'id' => 1]);
$jsonType->matches([
'name' => 'string:!empty',
'id' => 'integer:>0|string:>0',
]); // => true
$jsonType->matches([
'id' => 'string',
]); // => `id: 1` is not of type string
?>
```
Class JsonType
@package Codeception\Util
#### __construct()
*public* __construct($jsonArray)
Creates instance of JsonType
Pass an array or `\Codeception\Util\JsonArray` with data.
If non-associative array is passed - the very first element of it will be used for matching.
* `param` $jsonArray array|\Codeception\Util\JsonArray
[See source](https://github.com/Codeception/Codeception/blob/2.4/src/Codeception/Util/JsonType.php#L42)
#### addCustomFilter()
*public static* addCustomFilter($name, callable $callable)
Adds custom filter to JsonType list.
You should specify a name and parameters of a filter.
Example:
```php
<?php
JsonType::addCustomFilter('slug', function($value) {
return strpos(' ', $value) !== false;
});
// => use it as 'string:slug'
// add custom function to matcher with `len($val)` syntax
// parameter matching patterns should be valid regex and start with `/` char
JsonType::addCustomFilter('/len\((.*?)\)/', function($value, $len) {
return strlen($value) == $len;
});
// use it as 'string:len(5)'
?>
```
* `param` $name
* `param callable` $callable
[See source](https://github.com/Codeception/Codeception/blob/2.4/src/Codeception/Util/JsonType.php#L76)
#### cleanCustomFilters()
*public static* cleanCustomFilters()
Removes all custom filters
[See source](https://github.com/Codeception/Codeception/blob/2.4/src/Codeception/Util/JsonType.php#L84)
#### matchFilter()
*protected* matchFilter($filter, $value)
[See source](https://github.com/Codeception/Codeception/blob/2.4/src/Codeception/Util/JsonType.php#L158)
#### matches()
*public* matches(array $jsonType)
Checks data against passed JsonType.
If matching fails function returns a string with a message describing failure.
On success returns `true`.
* `param array` $jsonType
* `return` bool|string
[See source](https://github.com/Codeception/Codeception/blob/2.4/src/Codeception/Util/JsonType.php#L97)
#### typeComparison()
*protected* typeComparison($data, $jsonType)
[See source](https://github.com/Codeception/Codeception/blob/2.4/src/Codeception/Util/JsonType.php#L116)
<p> </p><div class="alert alert-warning">Reference is taken from the source code. <a href="https://github.com/Codeception/Codeception/blob/2.4/src//Codeception/Util/JsonType.php">Help us to improve documentation. Edit module reference</a></div>