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这篇文章主要介绍了PHP文件上传类,结合实例形式详细分析了PHP上传文件类的实现代码与相关使用技巧,需要的朋友可以参考下
这里演示了FileUpload.class.php文件上传类,其中用到了两个常量,可在网站配置文件中定义:
define('ROOT_PATH',dirname(__FILE__)); //网站根目录 define('UPDIR','/uploads/'); //上传主目录
具体代码如下:
error = $_FILES[$_file]['error']; $this->maxsize = $_maxsize / 1024; $this->type = $_FILES[$_file]['type']; $this->path = ROOT_PATH.UPDIR; $this->linktotay = date('Ymd').'/'; $this->today = $this->path.$this->linktotay; $this->name = $_FILES[$_file]['name']; $this->tmp = $_FILES[$_file]['tmp_name']; $this->checkError(); $this->checkType(); $this->checkPath(); $this->moveUpload(); } //返回路径 public function getPath() { $_path = $_SERVER["SCRIPT_NAME"]; $_dir = dirname(dirname($_path)); if ($_dir == '\\') $_dir = '/'; $this->linkpath = $_dir.$this->linkpath; return $this->linkpath; } //移动文件 private function moveUpload() { if (is_uploaded_file($this->tmp)) { if (!move_uploaded_file($this->tmp,$this->setNewName())) { Tool::alertBack('警告:上传失败!'); } } else { Tool::alertBack('警告:临时文件不存在!'); } } //设置新文件名 private function setNewName() { $_nameArr = explode('.',$this->name); $_postfix = $_nameArr[count($_nameArr)-1]; $_newname = date('YmdHis').mt_rand(100,1000).'.'.$_postfix; $this->linkpath = UPDIR.$this->linktotay.$_newname; return $this->today.$_newname; } //验证目录 private function checkPath() { if (!is_dir($this->path) || !is_writeable($this->path)) { if (!mkdir($this->path)) { Tool::alertBack('警告:主目录创建失败!'); } } if (!is_dir($this->today) || !is_writeable($this->today)) { if (!mkdir($this->today)) { Tool::alertBack('警告:子目录创建失败!'); } } } //验证类型 private function checkType() { if (!in_array($this->type,$this->typeArr)) { Tool::alertBack('警告:不合法的上传类型!'); } } //验证错误 private function checkError() { if (!empty($this->error)) { switch ($this->error) { case 1 : Tool::alertBack('警告:上传值超过了约定最大值!'); break; case 2 : Tool::alertBack('警告:上传值超过了'.$this->maxsize.'KB!'); break; case 3 : Tool::alertBack('警告:只有部分文件被上传!'); break; case 4 : Tool::alertBack('警告:没有任何文件被上传!'); break; default: Tool::alertBack('警告:未知错误!'); } } } } ?>
其中,用到了一个静态工具类 Tool.class.php,代码如下:
Tool.class.php
alert('$_info');history.back();"; exit(); } //弹窗赋值关闭 static public function alertOpenerClose($_info,$_path) { echo ""; echo ""; echo ""; echo ""; echo ""; exit(); } } ?>
下面进行一个实例演示,请看下面的步骤:
1、先创建一个 index.php 页面,做一个表单
index.php
main
2、创建 upfile.html 文件,建立表单提交到 upload.php
upfile.html
上传图片
3、通过 upload.php 文件调用文件上传类实现上传,并且把路径赋给 input 标签和显示图片
getPath(); Tool::alertOpenerClose('文件上传成功!',$_path); } else { Tool::alertBack('警告:文件过大或者其他未知错误导致浏览器崩溃!'); } ?>
总结:以上就是本篇文的全部内容,希望能对大家的学习有所帮助。
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