PHP AjaxForm提交图片上传并显示图片源码


            本文实例为大家分享了PHP AjaxForm提交图片上传并显示图片的具体代码，供大家参考，具体内容如下

PHP dofile.php 文件上传源码





<?php

$file_upload = "upload/";

$file_allow_ext='gif|jpg|jpeg|png|gif|zip|rar|ppt|xls|pdf|pptx|xlsx|docx';

$file_allow_size = 5*1024*1024;

if($_POST['submit']=="上传"){

 if(is_uploaded_file($_FILES['file']['tmp_name'])){

  $file_name = $_FILES['file']['name'];

  $file_error = $_FILES['file']['error'];

  $file_type = $_FILES['file']['type'];

  $file_tmp_name = $_FILES['file']['tmp_name']; 

  $file_size = $_FILES['file']['size'];

  $file_ext = substr($file_name, strrpos($file_name, '.')+1);

  switch($file_error){

  case 0:

  $data['status'] = 0;

  $data['msg'] = "文件上传成功!";  

  break;



  case 1:

  $data['status'] = 1;

  $data['msg'] = "文件上传失败，文件大小".$file_size."超过限制,允许上传大小".sizeFormat($file_allow_size)."!";  

  break;



  case 3:

  $data['status'] = 1;

  $data['msg'] = "上传失败，文件只有部份上传!";  

  break;



  case 4:

  $data['status'] = 1;

  $data['msg'] = "上传失败，文件没有被上传!";  

  break;



  case 5:

  $data['status'] = 1;

  $data['msg'] = "文件上传失败，文件大小为0!";  

  break; 

  }

  if(stripos($file_allow_ext,$file_ext)===false){

  $data['status'] = 1;

  $data['msg'] = "该文件扩展名不允许上传";  

  }

  if($file_size>$file_allow_size){  

  $data['status'] = 1;

  $data['msg'] = "文件大小超过限制,只能上传".sizeFormat($file_allow_size)."的文件!"; 

  } 

  if($data['status']==1){

  $data['status'] = 1;

  $data['msg'] = $data['msg'];

  exit(json_encode($data)); 

  }

  if($data['status']==0){

  if(file_exists($file_upload)){   

   $file_new_name = date("YmdHis").'_'.rand(10000,99999).'.'.$file_ext;

   $file_save_path = $file_upload.$file_new_name; 

   $data['status'] = 0;  

   $data['url'] = $file_save_path;

   move_uploaded_file($file_tmp_name,$file_save_path);

   exit(json_encode($data));    

  }else{

   exit(json_encode($data));

  }  



  }   

 }

}



function sizeFormat($size)

{

 $sizeStr='';

 if($size<1024)

 {

  return $size."bytes";

 }

 else if($size<(1024*1024))

 {

  $size=round($size/1024,1);

  return $size."KB";

 }

 else if($size<(1024*1024*1024))

 {

  $size=round($size/(1024*1024),1);

  return $size."MB";

 }

 else

 {

  $size=round($size/(1024*1024*1024),1);

  return $size."GB";

 } 

}







?>









HTML如下





<script type="text/javascript" src="http://lib.sinaapp.com/js/jquery/1.9.1/jquery-1.9.1.min.js"></script>

<script type="text/javascript" src="http://files.cnblogs.com/files/china-li/jquery.form.js"></script>



<form action="dofile.php" method="post" enctype="multipart/form-data" id="upfileimage">

<input type="hidden" name="image[]" />

<label for="file">文件:</label><input type="file" name="file" id="file" />

<input type="submit" name="submit" value="上传" />

</form>



<script type="text/javascript">

$("#upfileimage").submit(function(){

 if($("input[type=file]").val()==""){

  alert("请选择要上传的文件");

  return false;

 }

})

$(function(){

 var options = {  

  type:"POST",

  dataType:"json",

  resetForm:true,

  success:function(o){

   if(o.status==1){

   alert(o.msg);

   }else{

   $("body").append("  <img src='"+o.url+"' alt='' width='100' /><input type='hidden' name='image[]' value='"+o.url+"' />");

   }

  },

  error:function(o){

   alert(o.message);

  }  

 }

 $("#upfileimage").ajaxForm(options).submit(function(){return false;});



})

</script>







以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持中文源码网。