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copied!<p>Please check <a href="http://documentup.com/Respect/Validation" rel="noreferrer">Respect\Validation</a>. It's a library built for that purpouse. It can handle multiple rules very easily and uses exceptions for errors. Here is a quick sample:</p> <pre><code><?php use Respect\Validation\Validator as v; $usernameValidator = v::alnum()->noWhitespace()->length(1,15); $valid = $usernameValidator->validate("alganet"); //$valid now == true $valid = $usernameValidator->validate("ácido acético"); //$valid now == false </code></pre> <p>Now using exceptions:</p> <pre><code>try { $usernameValidator->assert("foo # bar"); } catch (Exception $e) { $errors = $e->findMessages('alnum', 'noWhitespace', 'length'); } </code></pre> <p>In the sample above, the <code>$errors</code> variable would be something like this:</p> <pre><code>array( "alnum" => '"foo # bar" must contain only letters and digits', "noWhitespace" => '"foo # bar" must not contain whitespace', "length" => null ) </code></pre> <p>I broke two previously declared rules using "foo # bar": It has whitespace and it has a non-alnum char. For every rule that doesn't pass, a message will be returned. Since "length" is OK, the error message is null.</p> <p>The <a href="http://documentup.com/Respect/Validation" rel="noreferrer">documentation</a> includes several more samples including nested, hierarchical rules and better exception handling. Also has a extensive list of samples for all of the 30+ built in validators.</p> <p>Hope that helps!</p>

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