base64,AJAX上传图片

最新推荐文章于 2024-03-05 16:56:14 发布

原创最新推荐文章于 2024-03-05 16:56:14 发布 · 367 阅读

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CC 4.0 BY-SA版权

文章标签：

#html #css #jquery

本文介绍如何通过HTML页面结合CSS样式和jQuery库，利用Base64编码和AJAX技术实现实时上传并预览图片的功能。用户选择图片后，先将其转化为Base64字符串，然后通过AJAX发送到服务器进行处理。

   public function base64_image_content($base64_image_content)
    {
        //匹配出图片的格式
        if (preg_match('/^(data:\s*image\/(\w+);base64,)/', $base64_image_content, $result)) {
            $type = $result[2];
            $path = 'frontend/uploads/images'.'/'.date("Ymd",time()).'/';
            if (!file_exists($path)){
                //检查是否有该文件夹，如果没有就创建，并给予最高权限
                mkdir($path, 777);
            }
            $picname = md5(uniqid(mt_rand(),true));
            $new_file = $path . $picname;
            //保存图片
            if (file_put_contents($new_file, base64_decode(str_replace($result[1],'',$base64_image_content)))) {
                 $url = $path . $picname;
                //return $new_file;
            } else {
                return false;
            }
        } else {
            return false;
        }
    }

html页面:

<html>
<header>
<style>
.tabs{width:1200px;height:auto;border: solid 1px blue;}
.tabs1{font-size: 20px; font-family: 宋体}
.tabs1 td img{width:80px;height:40px;}
.tabs2{font-size: 15px;font-family: 宋体}
.tabs2 td img{width:80px;height:40px;}
</style>
<header>
<body>
<script src="http://apps.bdimg.com/libs/jquery/2.1.1/jquery.min.js"></script>
<table data-toggle="table" align="center" class="tabs">
    <thead>
    <tr>
        <th>ID</th>
        <th>父级ID</th>
        <th>名称</th>
        <th>名称说明</th>
        <th>图片</th>
    </tr>
    </thead>
    <tbody>
    <td><input type="hidden" id="_csrf" value="<?php echo $csrf;?>" "></td>
    <?php foreach($optinfo as $k=>$v){;?>
        <tr class="tabs1">
            <td><?php echo $v['id'];?></td>
            <td><?php echo $v['parent_id'];?></td>
            <td><?php echo $v['opt_name'];?></td>
            <td><?php echo $v['detail_name'];?></td>
        </tr>
    <?php foreach($v['secondmeau'] as $k1=>$v1){;?>
        <?php if($v['id']==$v1['parent_id'])?>
            <tr class="tabs2">
             <td><?php echo "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;".$v1['id'];?></td>
            <td><?php echo "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;".$v1['parent_id'];?></td>
            <td><?php echo "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;".$v1['opt_name'];?></td>
            <td><?php echo "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;".$v1['detail_name'];?></td>
            <td><img src="<?php echo $v1['pic_img'];?>" id="tabs_img<?php echo $v1['id'];?>"></td>
            <input type="hidden" class="id2" value="<?php echo $v['id'];?>">
            <td><input type="file" onchange="Uploadimg(this.files,<?php echo $v1['id'];?>)"></td>
            </tr>
    <?php };?>
    <?php };?>
    </tbody>
</table>
</body>
</html>
<script type="text/javascript">
    var csrf = $("#_csrf").val();
    function Uploadimg(f,id){
   
        var imgdata ='';
        var reader = new FileReader();
        reader.readAsDataURL(f[0]);
        reader.onload = function(e) {
            $("#tabs_img"+id).attr("src",e.target.result);
            imgdata = e.target.result;
            ajaxupfromimg(csrf,id,imgdata);
        }
    }
    /***
     * 上传图片
     */
    function ajaxupfromimg(csrf,id,imgdata){
        if(csrf && id && imgdata){
            $.post('upimg',{_csrf:csrf,id:id,base64:imgdata},function (result){
                if(result.status==1){
                    //console.log(result)
                    alert(result.message);
                }else{
                    console.log(result);
                    //alert(result.message);
                }

            });
        }
        return false;
    }




</script>