add.php

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<?php
$page_owner_guid = get_input('page_owner_guid');
$handler = get_input('handler');
$context = get_input('context');
$show_access = (bool)get_input('show_access', true);
$column = get_input('column', 1);
$default_widgets = get_input('default_widgets', 0);
 
elgg_set_page_owner_guid($page_owner_guid);
 
elgg_push_context($context);
if ($default_widgets) {
    elgg_push_context('default_widgets');
}
elgg_push_context('widgets');
 
// logged in user must be able to edit the layout to add a widget
$page_owner = elgg_get_page_owner_entity();
if ($page_owner && elgg_can_edit_widget_layout($context)) {
    $guid = elgg_create_widget($page_owner->getGUID(), $handler, $context);
    if ($guid) {
        $widget = get_entity($guid);
 
        // position the widget
        $widget->move($column, 0);
 
        // send widget html for insertion
        echo elgg_view_entity($widget, array('show_access' => $show_access));
 
        forward(REFERER);
    }   
}
 
register_error(elgg_echo('widgets:add:failure'));
forward(REFERER);