Simple implementation of PHP+ajax image upload mvc ajax upload image jquery ajax upload image php ajax upload image

Use js to implement ajax, and PHP will return the path of the image after successfully uploading the image (a pop-up window will appear).

The effect is as follows:

1. Upload interface:

2. After successful upload

3. Files received in the background

The code is very simple:

1, html and js part:

	
		<title>Html5 Ajax 上传文件</title>
		<meta charset="utf-8">
		<script type="text/javascript">
			var xhr;

			function createXMLHttpRequest() {
				if (window.ActiveXObject) {
					xhr = new ActiveXObject("Microsoft.XMLHTTP");
				} else if (window.XMLHttpRequest) {
					xhr = new XMLHttpRequest();
				}
			}

			function UpladFile() {
				var fileObj = document.getElementById("file").files[0];
				var FileController = &#39;doajaxfileupload.php&#39;;
				var form = new FormData();
				form.append("myfile", fileObj);
				createXMLHttpRequest();
				xhr.onreadystatechange = handleStateChange;
				xhr.open("post", FileController, true);
				xhr.send(form);
			}

			function handleStateChange() {
				if (xhr.readyState == 4) {
					if (xhr.status == 200 || xhr.status == 0) {
						var result = xhr.responseText;
						var json = eval("(" + result + ")");
						alert(&#39;图片链接:\n&#39; + json.file);
					}
				}
			}
		</script>
		<!--<style>
			.txt{ height:28px; border:1px solid #cdcdcd; width:670px;}
			    .mybtn{ background-color:#FFF; line-height:14px;vertical-align:middle;border:1px solid #CDCDCD;height:30px; width:70px;}
			    .file{ position:absolute; top:0; right:80px; height:24px; filter:alpha(opacity:0);opacity: 0;width:260px }
		</style>-->
	

	
		<div class="form-group">
			<label class="control-label">图片</label>
			<br>
			<input type="'text'" name="'textfield'" id="'textfield'" class="'txt'">
			<span class="mybtn">浏览...</span>
			<input type="file" name="file" class="file" id="file" size="28">
			<span class="mybtn">上传</span>
		</div>
	

2, php part:

<?php if(isset($_FILES["myfile"]))
{
$ret = array();
//$uploadDir = &#39;images&#39;.DIRECTORY_SEPARATOR.date("Ymd").DIRECTORY_SEPARATOR;
$uploadDir = &#39;uploads&#39;.DIRECTORY_SEPARATOR;
$dir = dirname(__FILE__).DIRECTORY_SEPARATOR.$uploadDir;
file_exists($dir) || (mkdir($dir,0777,true) && chmod($dir,0777));
if(!is_array($_FILES["myfile"]["name"])) //single file
{
//$fileName = time().uniqid().&#39;.&#39;.pathinfo($_FILES["myfile"]["name"])[&#39;extension&#39;];
$fileName = $_FILES["myfile"]["name"];
move_uploaded_file($_FILES["myfile"]["tmp_name"],$dir.$fileName);
$ret[&#39;file&#39;] = DIRECTORY_SEPARATOR.$uploadDir.$fileName;
}
echo json_encode($ret);
}
?>

The above introduces the simple implementation of PHP+ajax image upload, including image upload and ajax content. I hope it will be helpful to friends who are interested in PHP tutorials.