C:/xampp/htdocs/moodle/lib/form/textarea.php

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<?php
require_once('HTML/QuickForm/textarea.php');

class MoodleQuickForm_textarea extends HTML_QuickForm_textarea{
    var $_formid = '';
    var $_helpbutton='';

    var $_hiddenLabel=false;

    function MoodleQuickForm_textarea($elementName=null, $elementLabel=null, $attributes=null) {
        parent::HTML_QuickForm_textarea($elementName, $elementLabel, $attributes);
    }
    function setHelpButton($helpbuttonargs, $function='helpbutton'){
        debugging('component setHelpButton() is not used any more, please use $mform->setHelpButton() instead');
    }
    function getHelpButton(){
        return $this->_helpbutton;
    }

    function setHiddenLabel($hiddenLabel){
        $this->_hiddenLabel = $hiddenLabel;
    }

    function toHtml(){
        if ($this->_hiddenLabel){
            $this->_generateId();
            return '<label class="accesshide" for="' . $this->getAttribute('id') . '" >' .
                    $this->getLabel() . '</label>' . parent::toHtml();
        } else {
            return parent::toHtml();
        }
    }

    function onQuickFormEvent($event, $arg, &$caller)
    {
        switch ($event) {
            case 'createElement':
                $this->_formid = $caller->getAttribute('id');
                break;
        }
        return parent::onQuickFormEvent($event, $arg, $caller);
    } // end func onQuickFormEvent
    function getElementTemplateType(){
        if ($this->_flagFrozen){
            return 'static';
        } else {
            return 'default';
        }
    }
}