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Encapsulation of common classes

Create a new include folder to store common class encapsulation classes

1, the usage of database encapsulation mysqli

Create a new ./include/conn.inc.php file

Used to store constants for database connections

<?php
define("HOST",'localhost');
define("USER",'root');
define("PWD",'root');
define("DBNAME",'onecms');

Create a new ./include/mysqli.php file

Used to connect to the database

<?php
include 'conn.inc.php';
$mysqli=new mysqli(HOST,USER,PWD,DBNAME);
if($mysqli->connect_errno){
die('Database link error'. $mysqli->connect_error);
}

2, Encapsulation operation of paging class

New./include /page.class.php file

<?php
class page{
    private $page;//當(dāng)前頁(yè)數(shù)
    private $pagenum;//每一頁(yè)顯示的數(shù)量
    private $totalnum;//總記錄數(shù)
    private $totalpage;//總頁(yè)數(shù)
    private $sql;
    
    function __construct($sql,$pagenum,$page) {
        $this->sql=$sql;
        $this->pagenum=$pagenum;
        $this->page=$page;
    }
    //獲取記錄
    function getPage(){
        global $mysqli;
//        0,6 1
//        6,6 2
//        12,6 3
        $result=$mysqli->query($this->sql);
        $this->totalnum=$result->num_rows;
        $this->totalpage= ceil($this->totalnum/$this->pagenum);//獲取總頁(yè)數(shù) 向上取整
        if($this->page<=0)
        {
            $this->page=1;
        }
        $startnum = ($this->page-1)*$this->pagenum;
        $this->sql.=" limit $startnum,$this->pagenum";
        $result=$mysqli->query($this->sql);
        return $result;
    }
    
    //獲取總記錄數(shù)
    
//    function getTotalNum(){
//       global $mysqli;
//      $result=$mysqli->query($this->sql);
//      return $result->num_rows;
//    }
    function getList(){
        //當(dāng)總記錄數(shù)小于等于每頁(yè)顯示的記錄
        if($this->totalnum<=$this->pagenum)
        {
            echo "總記錄數(shù):$this->totalnum";
        }
        //當(dāng)總記錄數(shù)大于每頁(yè)顯示的記錄
        else{
            $prev= $this->page-1;
            //5頁(yè)>=5頁(yè)
            //當(dāng)前頁(yè)面大于等于總頁(yè)數(shù)
            if($this->page>=$this->totalpage){
                $next=$this->totalpage; //當(dāng)前頁(yè)面等于總頁(yè)面數(shù)
            }
            //當(dāng)前頁(yè)面小于總頁(yè)數(shù)1<2
            else{
                $next= $this->page+1;
            }
            echo "<a href='?page=1'>首頁(yè)</a><a href='?page= $prev'>上一頁(yè)</a>";
            //如果總頁(yè)數(shù)小于7頁(yè)
            if($this->totalpage<=7)
            {   //如果當(dāng)前頁(yè)面等于循環(huán)中的$i 高亮顯示
                for($i=1;$i<=$this->totalpage;$i++)
                {
                    if($this->page==$i)
                    {
                        echo "<a href='?page=$i' class='on'>$i</a> ";
                    }
                    else{
                        echo "<a href='?page=$i'>$i</a> ";
                    }
                }
            }
            else{
                if($this->page==1 || $this->page==2 || $this->page==3)
                {
                    $b=1;
                    $m=7;
                }
                if($this->page>3)
                {
                    $b= $this->page-3;
                    $m= $this->page+3;
                }
                if($this->page==$this->totalpage || $this->page==$this->totalpage-1 || $this->page==$this->totalpage-2)
                {
                    $b=$this->totalpage-6;
                    $m= $this->totalpage;
                }
                if($this->page>4)
                {
                    echo "...";
                }
                for($i=$b;$i<=$m;$i++){
                    if($this->page==$i)
                    {
                        echo "<a href='?page=$i' class='on'>$i</a> ";
                    }
                    else{
                        echo "<a href='?page=$i'>$i</a> ";
                    }
                }
                if($this->page<$this->totalpage-3)
                {
                    echo "...";
                }
            }
            echo "<a href='?page=$next'>下一頁(yè)</a><a href='?page= $this->totalpage'>末頁(yè)</a>";
        }
    }
}

##3, upload class encapsulation operation

Create a new ./include/fileupload.class.php file

The code is as follows:

<?php
   /** 
      file: fileupload.class.php  文件上傳類FileUpload
      本類的實(shí)例對(duì)象用于處理上傳文件,可以上傳一個(gè)文件,也可同時(shí)處理多個(gè)文件上傳
   */
   class FileUpload { 
      private $path = "uploads";                     //上傳文件保存的路徑
      private $allowtype = array('jpg','gif','png');     //設(shè)置限制上傳文件的類型
      private $maxsize = 1000000;                //限制文件上傳大?。ㄗ止?jié))
      private $israndname = true;                //設(shè)置是否隨機(jī)重命名文件, false不隨機(jī)
      
      private $originName;                          //源文件名
      private $tmpFileName;                      //臨時(shí)文件名
      private $fileType;                           //文件類型(文件后綴)
      private $fileSize;                         //文件大小
      private $newFileName;                     //新文件名
      private $errorNum = 0;                     //錯(cuò)誤號(hào)
      private $errorMess="";                     //錯(cuò)誤報(bào)告消息
      
      /**
       * 用于設(shè)置成員屬性($path, $allowtype,$maxsize, $israndname)
       * 可以通過連貫操作一次設(shè)置多個(gè)屬性值
       *@param   string $key   成員屬性名(不區(qū)分大小寫)
       *@param   mixed  $val   為成員屬性設(shè)置的值
       *@return  object       返回自己對(duì)象$this,可以用于連貫操作
       */
      function set($key, $val){
         $key = strtolower($key); 
         if( array_key_exists( $key, get_class_vars(get_class($this) ) ) ){
            $this->setOption($key, $val);
         }
         return $this;
      }
      /**
       * 調(diào)用該方法上傳文件
       * @param  string $fileFile  上傳文件的表單名稱 
       * @return bool            如果上傳成功返回?cái)?shù)true 
       */
      
      function upload($fileField) {
         $return = true;
         /* 檢查文件路徑是滯合法 */
         if( !$this->checkFilePath() ) {             
            $this->errorMess = $this->getError();
            return false;
         }
         /* 將文件上傳的信息取出賦給變量 */
         $name = $_FILES[$fileField]['name'];
         $tmp_name = $_FILES[$fileField]['tmp_name'];
         $size = $_FILES[$fileField]['size'];
         $error = $_FILES[$fileField]['error'];
         /* 如果是多個(gè)文件上傳則$file["name"]會(huì)是一個(gè)數(shù)組 */
         if(is_Array($name)){      
            $errors=array();
            /*多個(gè)文件上傳則循環(huán)處理 , 這個(gè)循環(huán)只有檢查上傳文件的作用,并沒有真正上傳 */
            for($i = 0; $i < count($name); $i++){ 
               /*設(shè)置文件信息 */
               if($this->setFiles($name[$i],$tmp_name[$i],$size[$i],$error[$i] )) {
                  if(!$this->checkFileSize() || !$this->checkFileType()){
                     $errors[] = $this->getError();
                     $return=false; 
                  }
               }else{
                  $errors[] = $this->getError();
                  $return=false;
               }
               /* 如果有問題,則重新初使化屬性 */
               if(!$return)               
                  $this->setFiles();
            }
         
            if($return){
               /* 存放所有上傳后文件名的變量數(shù)組 */
               $fileNames = array();             
               /* 如果上傳的多個(gè)文件都是合法的,則通過銷魂循環(huán)向服務(wù)器上傳文件 */
               for($i = 0; $i < count($name);  $i++){ 
                  if($this->setFiles($name[$i], $tmp_name[$i], $size[$i], $error[$i] )) {
                     $this->setNewFileName(); 
                     if(!$this->copyFile()){
                        $errors[] = $this->getError();
                        $return = false;
                     }
                     $fileNames[] = $this->newFileName; 
                  }              
               }
               $this->newFileName = $fileNames;
            }
            $this->errorMess = $errors;
            return $return;
         /*上傳單個(gè)文件處理方法*/
         } else {
            /* 設(shè)置文件信息 */
            if($this->setFiles($name,$tmp_name,$size,$error)) {
               /* 上傳之前先檢查一下大小和類型 */
               if($this->checkFileSize() && $this->checkFileType()){  
                  /* 為上傳文件設(shè)置新文件名 */
                  $this->setNewFileName(); 
                  /* 上傳文件   返回0為成功, 小于0都為錯(cuò)誤 */
                  if($this->copyFile()){ 
                     return true;
                  }else{
                     $return=false;
                  }
               }else{
                  $return=false;
               }
            } else {
               $return=false; 
            }
            //如果$return為false, 則出錯(cuò),將錯(cuò)誤信息保存在屬性errorMess中
            if(!$return)
               $this->errorMess=$this->getError();   
            return $return;
         }
      }
      /** 
       * 獲取上傳后的文件名稱
       * @param  void    沒有參數(shù)
       * @return string     上傳后,新文件的名稱, 如果是多文件上傳返回?cái)?shù)組
       */
      public function getFileName(){
         return $this->path.'/'.$this->newFileName;
      }
      /**
       * 上傳失敗后,調(diào)用該方法則返回,上傳出錯(cuò)信息
       * @param  void    沒有參數(shù)
       * @return string      返回上傳文件出錯(cuò)的信息報(bào)告,如果是多文件上傳返回?cái)?shù)組
       */
      public function getErrorMsg(){
         return $this->errorMess;
      }
      
      /* 設(shè)置上傳出錯(cuò)信息 */
      private function getError() {
         $str = "上傳文件<font color='red'>{$this->originName}</font>時(shí)出錯(cuò) : ";
         switch ($this->errorNum) {
            case 4: $str .= "沒有文件被上傳"; break;
            case 3: $str .= "文件只有部分被上傳"; break;
            case 2: $str .= "上傳文件的大小超過了HTML表單中MAX_FILE_SIZE選項(xiàng)指定的值"; break;
            case 1: $str .= "上傳的文件超過了php.ini中upload_max_filesize選項(xiàng)限制的值"; break;
            case -1: $str .= "未允許類型"; break;
            case -2: $str .= "文件過大,上傳的文件不能超過{$this->maxsize}個(gè)字節(jié)"; break;
            case -3: $str .= "上傳失敗"; break;
            case -4: $str .= "建立存放上傳文件目錄失敗,請(qǐng)重新指定上傳目錄"; break;
            case -5: $str .= "必須指定上傳文件的路徑"; break;
            default: $str .= "未知錯(cuò)誤";
         }
         return $str.'<br>';
      }
      /* 設(shè)置和$_FILES有關(guān)的內(nèi)容 */
      private function setFiles($name="", $tmp_name="", $size=0, $error=0) {
         $this->setOption('errorNum', $error);
         if($error)
            return false;
         $this->setOption('originName', $name);
         $this->setOption('tmpFileName',$tmp_name);
         $aryStr = explode(".", $name);
         $this->setOption('fileType', strtolower($aryStr[count($aryStr)-1]));
         $this->setOption('fileSize', $size);
         return true;
      }
    
      /* 為單個(gè)成員屬性設(shè)置值 */
      private function setOption($key, $val) {
         $this->$key = $val;
      }
      /* 設(shè)置上傳后的文件名稱 */
      private function setNewFileName() {
         if ($this->israndname) {
            $this->setOption('newFileName', $this->proRandName()); 
         } else{ 
            $this->setOption('newFileName', $this->originName);
         } 
      }
      
      /* 檢查上傳的文件是否是合法的類型 */
      private function checkFileType() {
         if (in_array(strtolower($this->fileType), $this->allowtype)) {
            return true;
         }else {
            $this->setOption('errorNum', -1);
            return false;
         }
      }
       
      /* 檢查上傳的文件是否是允許的大小 */
      private function checkFileSize() {
         if ($this->fileSize > $this->maxsize) {
            $this->setOption('errorNum', -2);
            return false;
         }else{
            return true;
         }
      }
      /* 檢查是否有存放上傳文件的目錄 */
      private function checkFilePath() {
         if(empty($this->path)){
            $this->setOption('errorNum', -5);
            return false;
         }
         if (!file_exists($this->path) || !is_writable($this->path)) {
            if (!@mkdir($this->path, 0755)) {
               $this->setOption('errorNum', -4);
               return false;
            }
         }
         return true;
      }
      
      /* 設(shè)置隨機(jī)文件名 */
      private function proRandName() {      
         $fileName = date('YmdHis')."_".rand(100,999);      
         return $fileName.'.'.$this->fileType; 
      }
      
      /* 復(fù)制上傳文件到指定的位置 */
      private function copyFile() {
         if(!$this->errorNum) {
            $path = rtrim($this->path, '/').'/';
            $path .= $this->newFileName;
            if (@move_uploaded_file($this->tmpFileName, $path)) {
               return true;
            }else{
               $this->setOption('errorNum', -3);
               return false;
            }
         } else {
            return false;
         }
      }
   }






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