php-language-server/src/utils.php

<?php
declare(strict_types = 1);

namespace LanguageServer;

/**
 * Recursively Searches files with matching filename, starting at $path.
 *
 * @param string $path
 * @param string $pattern
 * @return array
 */
function findFilesRecursive(string $path, string $pattern): array {
    $dir = new \RecursiveDirectoryIterator($path);
    $ite = new \RecursiveIteratorIterator($dir);
    $files = new \RegexIterator($ite, $pattern, \RegexIterator::GET_MATCH);
    $fileList = [];
    foreach ($files as $file) {
        $fileList = array_merge($fileList, $file);
    }
    return $fileList;
}

/**
 * Transforms an absolute file path into a URI as used by the language server protocol.
 *
 * @param string $filepath
 * @return string
 */
function pathToUri(string $filepath): string {
    $filepath = trim(str_replace('\\', '/', $filepath), '/');
    $filepath = implode('/', array_map('urlencode', explode('/', $filepath)));
    return 'file:///' . $filepath;
}

/**
 * Transforms URI into file path
 * 
 * @param string $uri
 * @return string
 */
function uriToPath(string $uri)
{
    $path = urldecode(parse_url($uri)['path']);
    return strpos($path, ':') ? str_replace(\DIRECTORY_SEPARATOR, '\\', substr($path, 1)) : $path;
}