js php xmlrequest 上傳圖片

來源:互聯網
上載者:User

標籤:c   style   class   code   java   a   

本來想用外掛程式上傳圖片的,後來自己寫了一個簡單的js實現非同步圖片上傳,不多說上代碼非常簡單

upload.php

<?php

if(isset($_FILES["myfile"]))
{
    $ret = array();
    $uploadDir = ‘images‘.DIRECTORY_SEPARATOR.date("Ymd").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
    {
        $fileName = time().uniqid().‘.‘.pathinfo($_FILES["myfile"]["name"])[‘extension‘];
        move_uploaded_file($_FILES["myfile"]["tmp_name"],$dir.$fileName);
        $ret[‘file‘] = DIRECTORY_SEPARATOR.$uploadDir.$fileName;
    }
    echo json_encode($ret);
}

?>

index.html

<!DOCTYPE html>
<html>
<head>
    <title>Html5 Ajax 上傳檔案</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 = ‘upload.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(‘圖片連結:\n‘+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>
</head>


<body>

<div class="form-group">
    <label class="control-label">圖片</label>
    <br/>
    <input type=‘text‘ name=‘textfield‘ id=‘textfield‘ class=‘txt‘ />
    <span onclick="file.click()"  class="mybtn">瀏覽...</span>
    <input type="file" name="file" class="file" id="file" size="28" onchange="document.getElementById(‘textfield‘).value=this.value" />
    <span onclick="UpladFile()" class="mybtn">上傳</span>
</div>

</body>


</html>

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