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: /mnt/lmsestudio-instance-vol002/lms_a852e4e4c22f/vendor/respect/validation/docs/rules/ [ drwxr-xr-x ]
name : Call.md # Call - `v::call(callable $callback)` This is a very low level validator. It calls a function, method or closure for the input and then validates it. Consider the following variable: ```php $url = 'http://www.google.com/search?q=respect.github.com' ``` To validate every part of this URL we could use the native `parse_url` function to break its parts: ```php $parts = parse_url($url); ``` This function returns an array containing `scheme`, `host`, `path` and `query`. We can validate them this way: ```php v::arrayVal()->key('scheme', v::startsWith('http')) ->key('host', v::domain()) ->key('path', v::stringType()) ->key('query', v::notEmpty()); ``` Using `v::call()` you can do this in a single chain: ```php v::call( 'parse_url', v::arrayVal()->key('scheme', v::startsWith('http')) ->key('host', v::domain()) ->key('path', v::stringType()) ->key('query', v::notEmpty()) )->validate($url); ``` It is possible to call methods and closures as the first parameter: ```php v::call([$myObj, 'methodName'], v::intVal())->validate($myInput); v::call(function($input) {}, v::intVal())->validate($myInput); ``` *** See also: * [Callback](Callback.md)