protected function adjustCssUrl($cssContent, $inputFilePath, $outputFilePath)
{
$inputFilePath = str_replace('\\', '/', $inputFilePath);
$outputFilePath = str_replace('\\', '/', $outputFilePath);
$sharedPathParts = [];
$inputFilePathParts = explode('/', $inputFilePath);
$inputFilePathPartsCount = count($inputFilePathParts);
$outputFilePathParts = explode('/', $outputFilePath);
$outputFilePathPartsCount = count($outputFilePathParts);
for ($i = 0; $i < $inputFilePathPartsCount && $i < $outputFilePathPartsCount; $i++) {
if ($inputFilePathParts[$i] == $outputFilePathParts[$i]) {
$sharedPathParts[] = $inputFilePathParts[$i];
} else {
break;
}
}
$sharedPath = implode('/', $sharedPathParts);
$inputFileRelativePath = trim(str_replace($sharedPath, '', $inputFilePath), '/');
$outputFileRelativePath = trim(str_replace($sharedPath, '', $outputFilePath), '/');
if (empty($inputFileRelativePath)) {
$inputFileRelativePathParts = [];
} else {
$inputFileRelativePathParts = explode('/', $inputFileRelativePath);
}
if (empty($outputFileRelativePath)) {
$outputFileRelativePathParts = [];
} else {
$outputFileRelativePathParts = explode('/', $outputFileRelativePath);
}
$callback = function ($matches) use($inputFileRelativePathParts, $outputFileRelativePathParts) {
$fullMatch = $matches[0];
$inputUrl = $matches[1];
if (strpos($inputUrl, '/') === 0 || strpos($inputUrl, '#') === 0 || preg_match('/^https?:\\/\\//i', $inputUrl) || preg_match('/^data:/i', $inputUrl)) {
return $fullMatch;
}
if ($inputFileRelativePathParts === $outputFileRelativePathParts) {
return $fullMatch;
}
if (empty($outputFileRelativePathParts)) {
$outputUrlParts = [];
} else {
$outputUrlParts = array_fill(0, count($outputFileRelativePathParts), '..');
}
$outputUrlParts = array_merge($outputUrlParts, $inputFileRelativePathParts);
if (strpos($inputUrl, '/') !== false) {
$inputUrlParts = explode('/', $inputUrl);
foreach ($inputUrlParts as $key => $inputUrlPart) {
if ($inputUrlPart === '..') {
array_pop($outputUrlParts);
unset($inputUrlParts[$key]);
}
}
$outputUrlParts[] = implode('/', $inputUrlParts);
} else {
$outputUrlParts[] = $inputUrl;
}
$outputUrl = implode('/', $outputUrlParts);
return str_replace($inputUrl, $outputUrl, $fullMatch);
};
$cssContent = preg_replace_callback('/url\\(["\']?([^)^"^\']*)["\']?\\)/i', $callback, $cssContent);
return $cssContent;
}