站长图库向大家介绍了php图片上传,php封装等相关知识,希望对您有所帮助
php实现图片上传封装
1、先封装图片上传类 file.class.php
<?php class File{ public $images; public $filename; public $allow_size; public function __construct($images,$filename,$allow_size){ $this->images=$images; $this->filename=$filename; $this->allow_size=$allow_size; } //文件大小 public function allow_size(){ if($_FILES[$this->filename]['size']>$this->allow_size){ echo "上传文件过大"; return false; } return true; } //新的名字 public function type(){ $type=substr($_FILES[$this->filename]['name'],strrpos($_FILES[$this->filename]['name'],'.')+1); $name=time().rand(1000,9999).".".$type; return $name; } //放到一个新的文件 public function move(){ $name=$this->type(); if(is_uploaded_file($_FILES[$this->filename]['tmp_name'])){ @move_uploaded_file($_FILES[$this->filename]['tmp_name'],$this->images.$name); echo "<script>alert('添加图片成功')</script>"; return $name; }else{ echo "<script>alert('添加图片失败')</script>"; } } //判断文件上传是否成功 public function error(){ if($_FILES[$this->filename]['error']==0){ return true; } else if($_FILES[$this->filename]['error']==1){ echo "文件的大小超过了php.ini中配置文件的大小"; return false; } else if($_FILES[$this->filename]['error']==2){ echo "文件中的配置大小有问题"; return false; } else if($_FILES[$this->filename]['error']==3){ echo "找不到文件的位置"; return false; } } }2、封装数据库类 mysql.class.php
<?php class Mysql{ public $db_link; public $db_address; public $db_user; public $db_pwd; public $db_name; //public function __construct(IP地址, 用户名, 密码, 数据库) public function __construct($address,$user,$pwd,$name){ $this->db_address=$address; $this->db_user=$user; $this->db_pwd=$pwd; $this->db_name=$name; $this->connect(); } //连接数据库 public function connect(){ $this->db_link=mysql_connect($this->db_address,$this->db_user,$this->db_pwd); mysql_select_db($this->db_name); mysql_query("set names utf8"); } //进行 增删改 public function dml($sql){ $res=mysql_query($sql); if(!$res){ echo"sql语句错误"; }else{ return $res; } } //进行多条数据的查询 public function select_all($sql){ $res=mysql_query($sql); if(is_resource($res) && mysql_affected_rows()>0){ $arr=array(); while($w=mysql_fetch_assoc($res)){ $arr[]=$w; } return $arr; }else{