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Moodle JavaScript Cookbook by Alastair Hole

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Rejecting punctuation characters

In this recipe, we will add a rule that prevents the input of punctuation characters. This could be useful, for example, where you require the title of a new document to not contain periods or commas.

Getting ready

Please refer to the first recipe in this chapter for details on how to prepare a QuickForm web form which is the basis of this recipe.

How to do it...

Add the following code to our form definition in validation_form.php, just after the field definition:

$mform->addElement('text', 'mytext10', 'No punctuation');
$mform->addRule('mytext10', 'No punctuation', 'nopunctuation', null, 'client');

When we test this new rule by entering text that includes punctuation characters (a comma or period), we see that the ...

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