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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 $arr; }else{ return false; } } //进行单行数据进行查询 public function select_one($sql){ $res=mysql_query($sql); if(is_resource($res) && mysql_affected_rows()>0){ return mysql_fetch_assoc($res); }else{ return false; } } //将数据中的某一条数据进行删除 @parme ： 表名 条件 public function delete($table,$where){ //$str=mysql_query($sql); $str="delete from $table where $where"; return mysql_query($str); } //update table set name='fasf ' where id=4; public function update1($table,$arr,$where){ $str=""; foreach($arr as $k=>$v){ if(is_string($v)){ $str=$str.$k.'="$v",'; }else{ $str=$str.$k."=".$v.","; } } $value=rtrim($str,','); $sql="update $table set $value where $where"; return mysql_query($sql); } //添加一条数据insert into table(name,age) value('$name','$age'); public function insert($table,$arr){ $str1=''; $str2=''; foreach($arr as $k=>$v){ $str1=$str1.$k.","; if(is_string($v)){ $str2=$str2.'"'.$v.'",'; }else{ $str2=$str2.$v.','; } } $key=substr($str1,0,strlen($str1)-1); $value=substr($str2,0,strlen($str2)-1); $sql="insert into $table($key) value($value)"; mysql_query($sql); return mysql_insert_id(); } public function counts($sql){ mysql_query($sql); return mysql_affected_rows(); } } ?>3、创建文件上传表单upload.php
<form action="uploading_insert.php" method="post" enctype="multipart/form-data"> <meta charset="utf-8"/> <fieldset> <legend>用户上传信息</legend> <p> <label>姓名：</label> <input type="text" name="username"> </p> <p> <label>密码：</label> <input type="text" name="pwd"> </p> <p> <label>身份证号：</label> <input type="text" name="card1"> </p> <p> <label>上传图像：</label> <input type="file" name="filename"><input type="hidden" name="MAX_FILES_SIZE" value="1000000"> </p> <p> <input type="submit" value="上传"> </p> </fieldset> </form>
以上就是php如何实现图片上传的封装的详细内容。