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# HTML_QuickForm::isRuleRegistered()

HTML_QuickForm::isRuleRegistered() -- Returns whether the rule is supported

## Synopsis

    require_once 'HTML/QuickForm.php';

``boolean HTML_QuickForm::isRuleRegistered` (string $name)`

## Description

Returns whether or not the given rule is supported. New rules are registered via registerRule() method.

## Parameter

string `$name`

  Validation rule name

## Throws

throws no exceptions thrown

## Note

since 1.0

This function can not be called statically.

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HTML_QuickForm::getRegisteredRules() | Up | HTML_QuickForm::applyFilter()