在没有任何api的jquery中上传图片

<form id="uploadForm" enctype="multipart/form-data">
  <input type="file" id="fileInput">
  <button type="submit" id="uploadButton">上传</button>
</form>

$(document).ready(function() {
  $('#uploadForm').submit(function(event) {
    event.preventDefault();
    // 执行上传操作
  });
});

$(document).ready(function() {
  $('#uploadForm').submit(function(event) {
    event.preventDefault();
    
    var file = $('#fileInput')[0].files[0];
    var formData = new FormData();
    formData.append('file', file);
    
    // 执行上传操作
  });
});

$(document).ready(function() {
  $('#uploadForm').submit(function(event) {
    event.preventDefault();
    
    var file = $('#fileInput')[0].files[0];
    var formData = new FormData();
    formData.append('file', file);
    
    $.ajax({
      url: 'upload.php', // 服务器端处理上传的脚本文件
      type: 'POST',
      data: formData,
      processData: false,
      contentType: false,
      success: function(response) {
        // 上传成功后的处理逻辑
      },
      error: function(xhr, status, error) {
        // 上传失败后的处理逻辑
      }
    });
  });
});

<?php
if ($_FILES['file']['error'] === UPLOAD_ERR_OK) {
  $tempFile = $_FILES['file']['tmp_name'];
  $targetPath = 'uploads/';
  $targetFile = $targetPath . $_FILES['file']['name'];
  
  move_uploaded_file($tempFile, $targetFile);
  
  // 上传成功后的处理逻辑
} else {
  // 上传失败后的处理逻辑
}
?>