【下载文档:  PHP AjaxForm提交图片上传并显示图片源码.txt 】

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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
$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

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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。