如何将今天的日期应用于使用ajax和php上传的图像。

<form id="uploadForm" enctype="multipart/form-data">
  <input type="file" name="image" id="image">
  <button type="button" onclick="uploadImage()">上传</button>
</form>

function uploadImage() {
  var form = document.getElementById("uploadForm");
  var formData = new FormData(form);

  var xhr = new XMLHttpRequest();
  xhr.open("POST", "upload.php", true);
  xhr.onreadystatechange = function() {
    if (xhr.readyState === 4 && xhr.status === 200) {
      // 上传成功后的处理逻辑
    }
  };
  xhr.send(formData);
}

<?php
if ($_FILES["image"]["error"] === UPLOAD_ERR_OK) {
  $tempName = $_FILES["image"]["tmp_name"];
  $fileName = date("Ymd") . "_" . $_FILES["image"]["name"];
  $destination = "uploads/" . $fileName;
  
  if (move_uploaded_file($tempName, $destination)) {
    // 文件上传成功
  } else {
    // 文件上传失败
  }
} else {
  // 文件上传错误
}
?>