用jquery发送文件，用PHP接收(无plugIn)

// HTML部分
<input type="file" id="fileInput">
<button id="uploadButton">上传</button>

// JavaScript部分
$(document).ready(function() {
  $('#uploadButton').click(function() {
    var file = $('#fileInput')[0].files[0];
    var formData = new FormData();
    formData.append('file', file);

    $.ajax({
      url: 'upload.php',
      type: 'POST',
      data: formData,
      processData: false,
      contentType: false,
      success: function(response) {
        console.log('文件上传成功');
      },
      error: function() {
        console.log('文件上传失败');
      }
    });
  });
});

<?php
$targetDir = 'uploads/';
$targetFile = $targetDir . basename($_FILES['file']['name']);

if (move_uploaded_file($_FILES['file']['tmp_name'], $targetFile)) {
  echo '文件上传成功';
} else {
  echo '文件上传失败';
}
?>