iframe 上传

 

upload.html

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="http://www.diantang.cn/jquery/3.2.1/jquery.min.js"></script>
</head>
<body>
 
<iframe id="upload_target" name="upload_target" src="upload.php" style="width:0;heigth:0;overflow:hidden;border:0;position: absolute; left:-500px;"></iframe>
<img id="tag_img" src="http://www.pangdan.com/p_w_picpaths/chunwan.gif" />
<form enctype="multipart/form-data" action="upload.php" method="post" target="upload_target">
    <input type="file" id="fileipt" name="userfile" class="file" value=""  />
    <input type="submit" name="uploadimg" value="上传" id="submit" hidden />
</form>
 
<script type='text/javascript'>
    var lastFileName;
   $("#fileipt").change(function() {
       var fileName = $(this).val();
       var pos = fileName.lastIndexOf("\\");
       fileName = fileName.substr(pos+1, fileName.length);  // 截取出文件名 因为会带路径
       lastFileName = fileName;
       $("#submit").click();
   });
 
    function stopSend($url) {
        $("#tag_img").attr("src",$url);
    }
 
</script>
 
</body>
</html>

upload.php

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<?php
/**
 * Created by PhpStorm.
 * User: chenxiaolong
 * Date: 7/21/17
 * Time: 10:24
 */
//var_dump($_FILES);
$file=$_FILES['userfile'];
if($file['size'] != 0) {
    $name=rand(0,500000).dechex(rand(0,10000)).".jpg";
    move_uploaded_file($file['tmp_name'],$name);
    if($name) {
        echo "<script>parent.stopSend('$name')</script>";
    }
}

 

 

ajax 无刷新上传图片

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<button id="J_headimg" style="font-size: 12px;margin-left: 10px;width: 70px;height: 30px;background: #10AD5A;color: #fff;">修改头像</button>
<input type="file" name="pic" id="pic" hidden accept="p_w_picpath/*" />
<input type="text" id="headimg" name="headimg" hidden>
 
<script>
  $("#J_headimg").click(function() {
    $("#pic").click();
    return false;
  });
  $("#pic").change(function() {
    var $that = $(this);
    var imgPath = $(this).val();
    if (imgPath == "") {
      alert("请选择上传图片！");
      return;
    }
    //判断上传文件的后缀名
    var strExtension = imgPath.substr(imgPath.lastIndexOf('.') + 1);
    if (strExtension != 'jpg' && strExtension != 'gif'
            && strExtension != 'png' && strExtension != 'bmp' && strExtension != 'jpeg') {
      alert("请选择图片文件");
      return;
    }
    var formData = new FormData();
    formData.append('file', $that[0].files[0]);// php 用$_FILES['file']接收
    console.log($that[0].files[0]);
    $.ajax({
      type: "POST",
      url: "__URL__/uploadimg",
      data: formData,
      cache: false,
      processData: false,// 需要加这两个参数
      contentType: false,
      success: function(data) {
        var obj = JSON.parse(data);
        if(obj.status == 0) {
          $("#preimg").attr("src","Public/Upload/" + obj.data);
          $("#headimg").val(obj.data);
        } else {
          alert(obj.data);
        }
      },
      error: function(XMLHttpRequest, textStatus, errorThrown) {
        alert("上传失败，请检查网络后重试");
      }
    });
  });
 
</script>

对应uploadimg方法

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public function uploadimg() {
   $file = $_FILES['file'];
   $arr = array('jpg'=>'p_w_picpath/jpeg','png'=>'p_w_picpath/png','gif'=>'p_w_picpath/gif','bmp'=>'p_w_picpath/bmp');
   if($ext = array_search($file['type'],$arr)) {
      $rand = uniqid();
      $filename = "Public/Upload/avatar/{$rand}.{$ext}";
   } else {
      exit(json_encode(array('status'=>2,'data'=>'只支持图片上传')));
   }
   $r = move_uploaded_file($file['tmp_name'],$filename);
   if($r) {
      exit(json_encode(array('status'=>0,'data'=>"avatar/$rand.$ext")));
   } else {
      exit(json_encode(array('status'=>1,'data'=>'上传失败')));
   }
}