Input.php

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<?php
namespace Elgg\Http;

class Input {
    private $CONFIG;

    public function __construct() {
        global $CONFIG;
        $this->CONFIG = $CONFIG;
    }

    public function set($variable, $value) {
        
        if (!isset($this->CONFIG->input)) {
            $this->CONFIG->input = array();
        }
    
        if (is_array($value)) {
            array_walk_recursive($value, function(&$v, $k) { $v = trim($v);});
            $this->CONFIG->input[trim($variable)] = $value;
        } else {
            $this->CONFIG->input[trim($variable)] = trim($value);
        }
    }
    
    
    function get($variable, $default = null, $filter_result = true) {
            
        
    
        $result = $default;
    
        elgg_push_context('input');

        if (isset($this->CONFIG->input[$variable])) {
            // a plugin has already set this variable
            $result = $this->CONFIG->input[$variable];
            if ($filter_result) {
                $result = filter_tags($result);
            }
        } else {
            $request = _elgg_services()->request;
            $value = $request->get($variable);
            if ($value !== null) {
                $result = $value;
                if (is_string($result)) {
                    // @todo why trim
                    $result = trim($result);
                }
    
                if ($filter_result) {
                    $result = filter_tags($result);
                }
            }
        }

        elgg_pop_context();
    
        return $result;

    }
}