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