json_encode

Funkce json_encode() pro verze PHP < 5.2.0

Autor	David Grudl
Licence	public domain

Kód funkce

if (!function_exists('json_encode')) {

    /**
     * JSON encode
     *
     * @author     David Grudl
     * @copyright  Copyright (c) 2007 David Grudl
     */
    function json_encode($val)
    {
        // indexed array
        if (is_array($val) && (!$val
            || array_keys($val) === range(0, count($val) - 1))) {
            return '[' . implode(',', array_map('json_encode', $val)) . ']';
        }

        // associative array
        if (is_array($val) || is_object($val)) {
            $tmp = array();
            foreach ($val as $k => $v) {
                $tmp[] = json_encode((string) $k) . ':' . json_encode($v);
            }
            return '{' . implode(',', $tmp) . '}';
        }

        if (is_string($val)) {
            $val = str_replace(array("\\", "\x00"), array("\\\\", "\\u0000"), $val); // due to bug #40915
            return '"' . addcslashes($val, "\x8\x9\xA\xC\xD/\"") . '"';
        }

        if (is_int($val) || is_float($val)) {
            return rtrim(rtrim(number_format($val, 5, '.', ''), '0'), '.');
        }

        if (is_bool($val)) {
            return $val ? 'true' : 'false';
        }

        return 'null';
    }

}

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