php advanced code inserter

php_inserter.php

<?php

declare(strict_types=1);

$dir = realpath(__DIR__ . '/..');
$files = shell_exec("find " . escapeshellarg($dir) . " -print0");
$files = explode("\x00", rtrim($files, "\x00"));
$files = array_filter($files, function ($filepath) {
    if(!preg_match("/page/", $filepath)) {
        return false;
    }
    if(!preg_match("/\.php$/", $filepath)) {
        return false;
    }
    return true;
});
var_dump($files);
$insertCode = '
get_headers((defined("DOCKERDOMAIN") ? DOCKERDOMAIN : "http://localhost") . "/sa/logger?" . http_build_query(array("category" => "pages_file_in_use", "message" => __FILE__ . " - {$_SERVER[\'HTTP_HOST\']}{$_SERVER[\'REQUEST_URI\']} ",)), false, stream_context_create(array("ssl" => array("verify_peer" => false, "verify_peer_name" => false, "allow_self_signed" => true, "security_level" => 0))));
';
foreach ($files as $file) {
    $raw = file_get_contents($file);
    preg_match("/namespace\s+[\s\S]*?(\;)/", $raw, $matches, PREG_OFFSET_CAPTURE);
    $pos = $matches[1][1] ?? null;
    if (empty($pos)) {
        preg_match("/declare\s*\(strict_types[\s\S]*?(\;)/", $raw, $matches, PREG_OFFSET_CAPTURE);
        $pos = $matches[1][1] ?? null;
    }
    if (empty($pos)) {
        $code = "<?php\n" . $insertCode . "\n?>" . $raw;
    } else {
        $pos = filter_var($pos, FILTER_VALIDATE_INT);
        if ($pos === false) {
            throw new \LogicException("must be");
        }
        $code = substr($raw, 0, $pos) . ";" .  $insertCode . substr($raw, $pos + strlen(";"));
    }
    file_put_contents($file, $code);
}