Symfony\Component\HttpFoundation\Tests\RequestTest::getQueryStringNormalizationData PHP Method

    public function getQueryStringNormalizationData()
    {
        return array(
            array('foo', 'foo', 'works with valueless parameters'),
            array('foo=', 'foo=', 'includes a dangling equal sign'),
            array('bar=&foo=bar', 'bar=&foo=bar', '->works with empty parameters'),
            array('foo=bar&bar=', 'bar=&foo=bar', 'sorts keys alphabetically'),

            // GET parameters, that are submitted from a HTML form, encode spaces as "+" by default (as defined in enctype application/x-www-form-urlencoded).
            // PHP also converts "+" to spaces when filling the global _GET or when using the function parse_str.
            array('him=John%20Doe&her=Jane+Doe', 'her=Jane%20Doe&him=John%20Doe', 'normalizes spaces in both encodings "%20" and "+"'),

            array('foo[]=1&foo[]=2', 'foo%5B%5D=1&foo%5B%5D=2', 'allows array notation'),
            array('foo=1&foo=2', 'foo=1&foo=2', 'allows repeated parameters'),
            array('pa%3Dram=foo%26bar%3Dbaz&test=test', 'pa%3Dram=foo%26bar%3Dbaz&test=test', 'works with encoded delimiters'),
            array('0', '0', 'allows "0"'),
            array('Jane Doe&John%20Doe', 'Jane%20Doe&John%20Doe', 'normalizes encoding in keys'),
            array('her=Jane Doe&him=John%20Doe', 'her=Jane%20Doe&him=John%20Doe', 'normalizes encoding in values'),
            array('foo=bar&&&test&&', 'foo=bar&test', 'removes unneeded delimiters'),
            array('formula=e=m*c^2', 'formula=e%3Dm%2Ac%5E2', 'correctly treats only the first "=" as delimiter and the next as value'),

            // Ignore pairs with empty key, even if there was a value, e.g. "=value", as such nameless values cannot be retrieved anyway.
            // PHP also does not include them when building _GET.
            array('foo=bar&=a=b&=x=y', 'foo=bar', 'removes params with empty key'),
        );
    }