PHP图片上传类（支持自定义路径、大小、文件名称、缩略图）

<?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';
    }
}
?>

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