util.php

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<?php
class Util
{

    public static function camelcase($s, $lower=FALSE)
    {
        // Notacion lowerCamelCase
        if ($lower) {
            return self::lcfirst(str_replace(' ', '', ucwords(str_replace('_', ' ', $s))));
        }

        return str_replace(' ', '', ucwords(str_replace('_', ' ', $s)));
    }

    public static function uncamelize($str)
    {
        return self::smallcase($str);
    }

    public static function smallcase($s)
    {
        return strtolower(preg_replace('/([A-Z])/', "_\\1", self::lcfirst($s)));
    }

    public static function underscore($s)
    {
        return strtr($s, ' ', '_');
    }

    public static function dash($s)
    {
        return strtr($s, ' ', '-');
    }

    public static function humanize($s)
    {
        return strtr($s, '_-', '  ');
    }

    public static function array_merge_overwrite($a1, $a2)
    {
        return $a2 + $a1;
    }

    public static function array_insert(&$array, $position, $insert)
    {
        array_splice($array, $position, 0, $insert);
    }

    public static function getParams($params)
    {
        $data = array();
        foreach ($params as $p) {
            if (is_string($p)) {
                $match = explode(': ', $p, 2);
                if (isset($match[1])) {
                    $data[$match[0]] = $match[1];
                } else {
                    $data[] = $p;
                }
            } else {
                $data[] = $p;
            }
        }
        return $data;
    }

    public static function encomillar($lista)
    {
        $items = explode(',', $lista);
        return '"' . implode('","', $items) . '"';
    }

    public static function mkpath($path)
    {
        return FileUtil::mkdir($path);
    }

    public static function removedir($dir)
    {
        return FileUtil::rmdir($dir);
    }

    public static function lcfirst($s)
    {
        $s[0] = strtolower($s[0]);
        return $s;
    }

}