input.php

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<?php
function get_input(string $variable, $default = null, bool $filter_result = true) {
    return _elgg_services()->request->getParam($variable, $default, $filter_result);
}

function set_input(string $variable, $value): void {
    _elgg_services()->request->setParam($variable, $value, true);
}

function elgg_get_request_data(bool $filter_result = true): array {
    return _elgg_services()->request->getParams($filter_result);
}

function elgg_get_title_input(string $variable = 'title', string $default = ''): string {
    $raw_input = get_input($variable, $default, false);
    return htmlspecialchars($raw_input ?? '', ENT_QUOTES | ENT_SUBSTITUTE, 'UTF-8');
}

function elgg_sanitize_input($input) {
    return elgg_trigger_event_results('sanitize', 'input', [], $input);
}

function elgg_is_valid_email(string $address): bool {
    return _elgg_services()->accounts->isValidEmail($address);
}

function elgg_make_sticky_form(string $form_name, array $ignored_field_names = []): void {
    _elgg_services()->stickyForms->makeStickyForm($form_name, $ignored_field_names);
}

function elgg_clear_sticky_form(string $form_name): void {
    _elgg_services()->stickyForms->clearStickyForm($form_name);
}

function elgg_is_sticky_form(string $form_name): bool {
    return _elgg_services()->stickyForms->isStickyForm($form_name);
}

function elgg_get_sticky_value(string $form_name, string $variable = '', $default = null, bool $filter_result = true) {
    return _elgg_services()->stickyForms->getStickyValue($form_name, $variable, $default, $filter_result);
}

function elgg_get_sticky_values(string $form_name, bool $filter_result = true): array {
    return _elgg_services()->stickyForms->getStickyValues($form_name, $filter_result);
}

function elgg_is_empty($value): bool {
    return Elgg\Values::isEmpty($value);
}

function _elgg_htmlawed_tag_post_processor(string $tag, array|int $attributes = 0): string {
    if ($attributes === 0) {
        // This is a closing tag. Prevent further processing to avoid inserting a duplicate tag
        return "</{$tag}>";
    }
    
    $attributes = (array) elgg_trigger_event_results('attributes', 'htmlawed', [
        'attributes' => $attributes,
        'tag' => $tag,
    ], $attributes);

    $result = '';
    foreach ($attributes as $attr => $value) {
        $result .= " {$attr}=\"{$value}\"";
    }
    
    return "<{$tag}{$result}>";
}

function elgg_string_to_array(string $string): array {
    $ar = explode(',', $string);
    $ar = array_map('trim', $ar);
    $ar = array_map('strip_tags', $ar);
    
    $ar = array_filter($ar, function($string) {
        return !elgg_is_empty($string);
    });
    
    $ar = array_unique($ar);
    
    // reset keys
    return array_values($ar);
}