/**
* A wrapper for PHP's parse_url() function that handles consistency in the return
* values across PHP versions.
*
* PHP 5.4.7 expanded parse_url()'s ability to handle non-absolute url's, including
* schemeless and relative url's with :// in the path. This function works around
* those limitations providing a standard output on PHP 5.2~5.4+.
*
* Secondly, across various PHP versions, schemeless URLs starting containing a ":"
* in the query are being handled inconsistently. This function works around those
* differences as well.
*
* Error suppression is used as prior to PHP 5.3.3, an E_WARNING would be generated
* when URL parsing failed.
*
* @since 4.4.0
* @since 4.7.0 The $component parameter was added for parity with PHP's parse_url().
*
* @param string $url The URL to parse.
* @param int $component The specific component to retrieve. Use one of the PHP
* predefined constants to specify which one.
* Defaults to -1 (= return all parts as an array).
* @see http://php.net/manual/en/function.parse-url.php
* @return mixed False on parse failure; Array of URL components on success;
* When a specific component has been requested: null if the component
* doesn't exist in the given URL; a sting or - in the case of
* PHP_URL_PORT - integer when it does. See parse_url()'s return values.
*/
function wp_parse_url($url, $component = -1)
{
$to_unset = array();
$url = strval($url);
if ('//' === substr($url, 0, 2)) {
$to_unset[] = 'scheme';
$url = 'placeholder:' . $url;
} elseif ('/' === substr($url, 0, 1)) {
$to_unset[] = 'scheme';
$to_unset[] = 'host';
$url = 'placeholder://placeholder' . $url;
}
$parts = @parse_url($url);
if (false === $parts) {
// Parsing failure.
return $parts;
}
// Remove the placeholder values.
foreach ($to_unset as $key) {
unset($parts[$key]);
}
return _get_component_from_parsed_url_array($parts, $component);
}
/**
* @ticket 36356
*
* @dataProvider get_component_from_parsed_url_array_testcases
*/
function test_get_component_from_parsed_url_array($url, $component, $expected)
{
$parts = wp_parse_url($url);
$actual = _get_component_from_parsed_url_array($parts, $component);
$this->assertSame($expected, $actual);
}
