本文实例讲述了PHP文件上传类。分享给大家供大家参考，具体如下：
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：
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define('ROOT_PATH',dirname(__FILE__)); //网站根目录
define('UPDIR','/uploads/'); //上传主目录
具体代码如下：
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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'.$this->maxsize.'KB！');
break;
case 3 :
Tool::alertBack('警告：只有部分文件被上传！');
break;
case 4 :
Tool::alertBack('警告：没有任何文件被上传！');
break;
default:
Tool::alertBack('警告：未知错误！');
}
}
}
}
?>
其中，用到了一个静态工具类 Tool.class.PHP，代码如下：
Tool.class.PHP
PHP;">
PHP
class Tool {
//弹窗返回
static public function alertBack($_info) {
echo "";
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：
index.PHP