Simple implementation of PHP+ajax image upload mvc ajax upload image jquery ajax upload image php ajax upload image-PHP Tutorial-php.cn

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

Jul 29, 2016 am 08:55 AM

ajax upload picture

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:

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2. After successful upload

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3. Files received in the background

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The code is very simple:

1, html and js part:

&lt;!DOCTYPE html&gt;
&lt;html&gt;

	&lt;head&gt;
		&lt;title&gt;Html5 Ajax 上传文件&lt;/title&gt;
		&lt;meta charset=&quot;utf-8&quot;&gt;
		&lt;script type=&quot;text/javascript&quot;&gt;
			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 = 'doajaxfileupload.php';
				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('图片链接:\n' + json.file);
					}
				}
			}
		&lt;/script&gt;
		&lt;!--&lt;style&gt;
			.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 }
		&lt;/style&gt;--&gt;
	&lt;/head&gt;

	&lt;body&gt;
		&lt;div class=&quot;form-group&quot;&gt;
			&lt;label class=&quot;control-label&quot;&gt;图片&lt;/label&gt;
			&lt;br/&gt;
			&lt;input type=&#39;text&#39; name=&#39;textfield&#39; id=&#39;textfield&#39; class=&#39;txt&#39; /&gt;
			&lt;span  class=&quot;mybtn&quot;&gt;浏览...&lt;/span&gt;
			&lt;input type=&quot;file&quot; name=&quot;file&quot; class=&quot;file&quot; id=&quot;file&quot; size=&quot;28&quot;  /&gt;
			&lt;span  class=&quot;mybtn&quot;&gt;上传&lt;/span&gt;
		&lt;/div&gt;
	&lt;/body&gt;

&lt;/html&gt;

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2, php part:

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

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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.

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