php 文件上传缩略图路径分析类

<?php

//文件上传时分析路径信息

//author:songzhenghe 2014-1-24

//version 0.1

class path_ana {

    private $data_root;

    private $web_root;

    private $http_domain;

    private $file;

    private $r;

    public function __construct(){

        //从配置文件中读取

        $this->data_root=‘E:/wwwroot2/cms/common/upload/‘;

        $this->web_root =‘E:/wwwroot2/cms/‘;

        $this->http_domain=‘http://www.cms.com/‘;

        $this->r=null;

    }

    //$file E:/wwwroot2/cms/common/upload/2013/08/345349534.jpg

    public function init($file){

        $this->file=$file;

        $return=array();

        $pathinfo=pathinfo($file);

        // E:/wwwroot2/cms/common/upload/2013/08/

        $return[0]=$pathinfo[‘dirname‘].‘/‘;

        // 345349534.jpg

        $return[1]=$pathinfo[‘basename‘];

        // 345349534

        if(strrpos($return[1],‘.‘)!==false){

            $return[2]=substr($return[1],0,strrpos($return[1],‘.‘));

        }else{

            $return[2]=$return[1];

        }

        // jpg

        $return[3]=$pathinfo[‘extension‘];

        // 2013/08/345349534.jpg

        $return[4]=$this->str_replace_once($this->data_root,‘‘,$file);

        // 2013/08/

        $return[5]=dirname($return[4]).‘/‘;

        // E:/wwwroot2/cms/common/upload/

        $return[6]=$this->data_root;

        // common/upload/2013/08/345349534.jpg

        $return[7]=$this->str_replace_once($this->web_root,‘‘,$file);

        // common/upload/2013/08/

        $return[8]=dirname($return[7]).‘/‘;

        // E:/wwwroot2/cms/

        $return[9]=$this->web_root;

        // common/upload/

        $return[10]=preg_replace(‘/‘.preg_quote($return[5],‘/‘).‘$/i‘,‘‘,$return[8],1);

        // http://www.cms.com/common/upload/2013/08/345349534.jpg

        $return[11]=$this->http_domain.$return[7];

        // /common/upload/2013/08/345349534.jpg

        $return[12]=‘/‘.$return[7];

        //  E:/wwwroot2/cms/common/upload/2013/08/345349534.jpg

        $return[13]=$this->file;

        $this->r=$return;

        return $return;

    }

    //http://www.php100.com/html/php/hanshu/2013/0905/4683.html

    private function str_replace_once($needle,$replace,$haystack) {

        $pos=strpos($haystack,$needle);

        if ($pos===false) return $haystack;

        return substr_replace($haystack,$replace,$pos,strlen($needle));

    }

    //

    public function rename_file($prefix=‘thumb_‘,$suffix=‘‘){

        if($this->r[3]){

            $new=$this->r[0].$prefix.$this->r[2].$suffix.‘.‘.$this->r[3];

        }else{

            $new=$this->r[0].$prefix.$this->r[2].$suffix;

        }

        return $new;

    }

//

}

echo ‘<pre>‘;

$file=‘E:/wwwroot2/cms/common/upload/2013/08/345349534.jpg‘;

$path_ana=new path_ana();

$r=$path_ana->init($file);

print_r($r);

$file=$path_ana->rename_file();

$r=$path_ana->init($file);

print_r($r);