PHP图片上传类（支持自定义路径、大小、文件名称、缩略图）

[php]代码库

<?php
class pic_upload{
	var $FormName; //文件域名称
	var $Directroy; //上传至目录
	var $MaxSize; //最大上传大小
	var $CanUpload; //是否可以上传
	var $doUpFile; //上传的文件名
	var $sm_File; //缩略图名称
	var $Error;   //错误参数

	function ieb_upload($formName='', $dirPath='', $maxSize=2097152) //(1024*2)*1024=2097152 就是 2M
	{
		global $FormName, $Directroy, $MaxSize, $CanUpload, $Error, $doUpFile, $sm_File;
		//初始化各种参数
		$FormName = $formName;
		$MaxSize = $maxSize;
		$CanUpload = true;
		$doUpFile = '';
		$sm_File = '';
		$Error = 0;

		if ($formName == ''){
			$CanUpload = false;
			$Error = 1;
			break;
		}

		if ($dirPath == ''){
			$Directroy = $dirPath;
		}else{
			$Directroy = $dirPath.'/';
		}
	}

	//检查文件是否存在
	function scanFile()
	{
		global $FormName, $Error, $CanUpload;

		if ($CanUpload){

			$scan = is_readable($_FILES[$FormName]['name']);

			if ($scan){
				$Error = 2;
			}

			return $scan;
		}
	}


	//获取文件大小
	function getSize($format = 'B')
	{
		global $FormName, $Error, $CanUpload;

		if ($CanUpload){

			if ($_FILES[$FormName]['size'] == 0){
				$Error = 3;
				$CanUpload = false;
			}

			switch ($format){
				case 'B':
					return $_FILES[$FormName]['size'];
					break;

				case 'M':
					return ($_FILES[$FormName]['size'])/(1024*1024);
			}

		}
	}

	//获取文件类型
	function getExt()
	{
		global $FormName, $Error, $CanUpload;

		if ($CanUpload){
			$ext=$_FILES[$FormName]['name'];
			$extStr=explode('.',$ext);
			$count=count($extStr)-1;
		}
		return $extStr[$count];
	}

	//获取文件名称
	function getName()
	{
		global $FormName, $CanUpload;

		if ($CanUpload){
			return $_FILES[$FormName]['name'];
		}
	}

	//新建文件名
	function newName()
	{
		global $CanUpload, $FormName;

		if ($CanUpload){
			$FullName=$_FILES[$FormName]['name'];
			$extStr=explode('.',$FullName);
			$count=count($extStr)-1;
			$ext = $extStr[$count];

			return date('YmdHis').rand(0,9).'.'.$ext;
		}
	}

	//上传文件
	function upload($fileName = '')
	{
		global $FormName, $Directroy, $CanUpload, $Error, $doUpFile;

		if ($CanUpload){
			if ($_FILES[$FormName]['size'] == 0){
				$Error = 3;
				$CanUpload = false;
				return $Error;
				break;
			}
		}

		if($CanUpload){

			if ($fileName == ''){
				$fileName = $_FILES[$FormName]['name'];
			}

			$doUpload=@copy($_FILES[$FormName]['tmp_name'], $Directroy.$fileName);

			if($doUpload)
			{
				$doUpFile = $fileName;
				chmod($Directroy.$fileName, 0777);
				return true;
			}else{
				$Error = 4;
				return $Error;
			}
		}
	}

	//创建图片缩略图
	function thumb($dscChar='',$width=150,$height=113)
	{
		global $CanUpload, $Error, $Directroy, $doUpFile, $sm_File;

		if ($CanUpload && $doUpFile != ''){
			$srcFile = $doUpFile;

			if ($dscChar == ''){
				$dscChar = 'sm_';
			}

			$dscFile = $Directroy.$dscChar.$srcFile;
			$data = getimagesize($Directroy.$srcFile,&$info);

			switch ($data[2]) {
				case 1:
					$im = @imagecreatefromgif($Directroy.$srcFile);
					break;

				case 2:
					$im = @imagecreatefromjpeg($Directroy.$srcFile);
					break;

				case 3:
					$im = @imagecreatefrompng($Directroy.$srcFile);
					break;
			}

			$srcW=imagesx($im);
			$srcH=imagesy($im);
			$ni=imagecreatetruecolor($width,$height);
			imagecopyresized($ni,$im,0,0,0,0,$width,$height,$srcW,$srcH);
			$cr = imagejpeg($ni,$dscFile);
			chmod($dscFile, 0777);

			if ($cr){
				$sm_File = $dscFile;
				return true;
			}else{
				$Error = 5;
				return $Error;
			}
		}
	}

	//显示错误参数
	function Err(){
		global $Error;
		return $Error;
	}

	//上传后的文件名
	function UpFile(){
		global $doUpFile, $Error;
		if ($doUpFile != ''){
			return $doUpFile;
		}else{
			$Error = 6;
		}
	}

	//上传文件的路径
	function filePath(){
		global $Directroy, $doUpFile, $Error;
		if ($doUpFile != ''){
			return $Directroy.$doUpFile;
		}else{
			$Error = 6;
		}
	}

	//缩略图文件名称
	function thumbMap(){
		global $sm_File, $Error;
		if ($sm_File != ''){
			return $sm_File;
		}else{
			$Error = 6;
		}
	}

	//显示版本信息
	function ieb_version(){
		return 'IEB_UPLOAD CLASS Ver 1.1';
	}
}
?>