function UriResolver::getRelativePath

1 call to UriResolver::getRelativePath()

UriResolver::relativize in vendor/guzzlehttp/psr7/src/UriResolver.php

Returns the target URI as a relative reference from the base URI.

File

vendor/guzzlehttp/psr7/src/UriResolver.php, line 174

Class

UriResolver

Resolves a URI reference in the context of a base URI and the opposite way.

Namespace

GuzzleHttp\Psr7

Code

private static function getRelativePath(UriInterface $base, UriInterface $target) : string {
    $sourceSegments = explode('/', $base->getPath());
    $targetSegments = explode('/', $target->getPath());
    array_pop($sourceSegments);
    $targetLastSegment = array_pop($targetSegments);
    foreach ($sourceSegments as $i => $segment) {
        if (isset($targetSegments[$i]) && $segment === $targetSegments[$i]) {
            unset($sourceSegments[$i], $targetSegments[$i]);
        }
        else {
            break;
        }
    }
    $targetSegments[] = $targetLastSegment;
    $relativePath = str_repeat('../', count($sourceSegments)) . implode('/', $targetSegments);
    // A reference to am empty last segment or an empty first sub-segment must be prefixed with "./".
    // This also applies to a segment with a colon character (e.g., "file:colon") that cannot be used
    // as the first segment of a relative-path reference, as it would be mistaken for a scheme name.
    if ('' === $relativePath || false !== strpos(explode('/', $relativePath, 2)[0], ':')) {
        $relativePath = "./{$relativePath}";
    }
    elseif ('/' === $relativePath[0]) {
        if ($base->getAuthority() != '' && $base->getPath() === '') {
            // In this case an extra slash is added by resolve() automatically. So we must not add one here.
            $relativePath = ".{$relativePath}";
        }
        else {
            $relativePath = "./{$relativePath}";
        }
    }
    return $relativePath;
}