php+ajax实现图片文件上传功能实例

2019-04-16 05:12:30 来源：易采站长站作者：于丽

            {
                var result = xhr.responseText;
                var json = eval("(" + result + ")");
                alert('图片链接: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">图片</label>
    <br/>
    <input type='text' name='textfield' id='textfield' class='txt' />
    <span onclick="file.click()" class="mybtn">浏览...</span>
    <input type="file" name="file" class="file" id="file" size="28" onchange="document.getElementById('textfield').value=this.value" />
    <span onclick="UpladFile()" class="mybtn">上传</span>
</div>
</body>
</html>

php代码：

<?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);
}
?>