如何在php中统计上传文件的数量

<form action="upload.php" method="post" enctype="multipart/form-data">
    <input type="file" name="file[]" multiple>
    <input type="submit" value="上传文件">
</form>

<?php
if ($_SERVER["REQUEST_METHOD"] == "POST" && isset($_FILES["file"])) {
    $fileCount = count($_FILES["file"]["name"]);
    echo "上传文件数量：" . $fileCount;
}
?>