php图片上传类 附调用方法

本文实例为大家分享php图片上传类，供大家参考，具体内容如下

 调用方法：

<?phpheader("Content-Type:text/html; charset=utf-8"); //类的实例化：include("uppoo.php");//类的文件名是upoop.php$up=newupphoto;$submit=$_POST['submit'];if($submit=="上传"){$up->get_ph_tmpname($_FILES['photo']['tmp_name']);$up->get_ph_type($_FILES['photo']['type']);$up->get_ph_size($_FILES['photo']['size']);$up->get_ph_name($_FILES['photo']['name']);$up->save();}?>//上传图片的HTML：<form action="upphoto.php?action=act" method="post" enctype="multipart/form-data">图片来源：<input type="file" name="photo"><input type="submit" name="submit" value="上传"> 

 上传类，保存文件名称为 uppoo.php：

<?phpclass upphoto{public $previewsize=0.125 ;  //预览图片比例public $preview=0;  //是否生成预览，是为1，否为0  public $datetime;  //随机数  public $ph_name;  //上传图片文件名  public $ph_tmp_name;  //图片临时文件名  public $ph_path="./userimg/";  //上传文件存放路径public $ph_type;  //图片类型  public $ph_size;  //图片大小  public $imgsize;  //上传图片尺寸，用于判断显示比例  public $al_ph_type=array('image/jpg','image/jpeg','image/png','image/pjpeg','image/gif','image/bmp','image/x-png');  //允许上传图片类型  public $al_ph_size=1000000;  //允许上传文件大小 function __construct(){  $this->set_datatime(); } function set_datatime(){  $this->datetime=date("YmdHis"); }  //获取文件类型 function get_ph_type($phtype){   $this->ph_type=$phtype; } //获取文件大小 function get_ph_size($phsize){   $this->ph_size=$phsize."<br>"; } //获取上传临时文件名 function get_ph_tmpname($tmp_name){  $this->ph_tmp_name=$tmp_name;  $this->imgsize=getimagesize($tmp_name); } //获取原文件名 function get_ph_name($phname){  $this->ph_name=$this->ph_path.$this->datetime.strrchr($phname,"."); //strrchr获取文件的点最后一次出现的位置//$this->ph_name=$this->datetime.strrchr($phname,"."); //strrchr获取文件的点最后一次出现的位置return $this->ph_name; }// 判断上传文件存放目录 function check_path(){  if(!file_exists($this->ph_path)){   mkdir($this->ph_path);  } } //判断上传文件是否超过允许大小 function check_size(){  if($this->ph_size>$this->al_ph_size){   $this->showerror("上传图片超过2000KB");  } } //判断文件类型 function check_type(){  if(!in_array($this->ph_type,$this->al_ph_type)){     $this->showerror("上传图片类型错误");  } } //上传图片  function up_photo(){  if(!move_uploaded_file($this->ph_tmp_name,$this->ph_name)){  $this->showerror("上传文件出错");  } } //图片预览  function showphoto(){   if($this->preview==1){   if($this->imgsize[0]>2000){    $this->imgsize[0]=$this->imgsize[0]*$this->previewsize;       $this->imgsize[1]=$this->imgsize[1]*$this->previewsize;   }     echo("<img src=/"{$this->ph_name}/" width=/"{$this->imgsize['0']}/" height=/"{$this->imgsize['1']}/">");   }  } //错误提示 function showerror($errorstr){  echo "<script language=java script>alert('$errorstr');location='java script:history.go(-1);';</script>";  exit(); } function save(){  $this->check_path();  $this->check_size();  $this->check_type();  $this->up_photo();  $this->showphoto(); }}?>