php数据库操作model类,PDO操作MySQL基础教程

By admin in 编程 on 2019年7月2日

本文实例讲述了PHP实现的mysql操作类。分享给大家供大家参考,具体如下:

本文实例讲述了PHP PDO操作MySQL的方法。分享给大家供大家参考,具体如下:

本文实例讲述了php数据库操作model类。分享给大家供大家参考,具体如下:

首先是mysql方式

PHP中的PDO扩展为PHP访问数据库定义了一个轻量级的、一致性的接口,它提供了一个数据访问抽象层,这样,无论使用什么数据库,都可以通过一致的函数执行查询和获取数据。

该数据库操作类使用__call()方法实现了数据的查找功能。

<?php
class ConnectionMySQL{
  //主机
  private $host="localhost";
  //数据库的username
  private $name="root";
  //数据库的password
  private $pass="";
  //数据库名称
  private $table="phptest";
  //编码形式
  private $ut="utf-8";
  //构造函数
  function __construct(){
    $this->ut=$ut;
    $this->connect();
  }
  //数据库的链接
  function connect(){
    $link=mysql_connect($this->host,$this->name,$this->pass) or die ($this->error());
    mysql_select_db($this->table,$link) or die("没该数据库:".$this->table);
    mysql_query("SET NAMES '$this->ut'");
  }
  function query($sql, $type = '') {
    if(!($query = mysql_query($sql))) $this->show('Say:', $sql);
    return $query;
  }
  function show($message = '', $sql = '') {
    if(!$sql) echo $message;
    else echo $message.'<br>'.$sql;
  }
  function affected_rows() {
    return mysql_affected_rows();
  }
  function result($query, $row) {
    return mysql_result($query, $row);
  }
  function num_rows($query) {
    return @mysql_num_rows($query);
  }
  function num_fields($query) {
    return mysql_num_fields($query);
  }
  function free_result($query) {
    return mysql_free_result($query);
  }
  function insert_id() {
    return mysql_insert_id();
  }
  function fetch_row($query) {
    return mysql_fetch_row($query);
  }
  function version() {
    return mysql_get_server_info();
  }
  function close() {
    return mysql_close();
  }
  //向$table表中插入值
  function fn_insert($table,$name,$value){
    $this->query("insert into $table ($name) value ($value)");
  }
  //根据$id值删除表$table中的一条记录
  function fn_delete($table,$id,$value){
    $this->query("delete from $table where $id=$value");
    echo "id为". $id." 的记录被成功删除!";
  }
}
$db = new ConnectionMySQL();
$db->fn_insert('test','id,name,sex',"'','hongtenzone','M'");
$db->fn_delete('test', 'id', 1);
?>

PDO支持的PHP版本为PHP5.1以及更高的版本,而且在PHP5.2下PDO默认为开启状态,

代码如下:

mysqli的方式:

下面是在php.ini中PDO的配置:

<?php
/*
作者 : shyhero
*/
define("HOSTNAME","127.0.0.1");
define("USERNAME","root");
define("PASSWORD","");
define("DATANAME","class");
class Model{
    private $link;
    private $tableName;
    private $zd;
    private $method = array(
      "where" => "",
      "order" => "",
      "limit" => "",
      "group" => "",
      "having" => ""
      );
    public function __construct($tableName){
      $this -> tableName = $tableName;
      try{
        $this -> link = mysqli_connect(HOSTNAME,USERNAME,PASSWORD,DATANAME);
        mysqli_set_charset($this -> link,"UTF8");
      }catch(Exception $e){
        echo "数据库连接失败";
      }
      $this -> desc();
    }
    public function __destruct(){
      mysqli_close($this -> link);
    }
    public function desc(){
      $sql = " desc {$this -> tableName}; ";
      $res = mysqli_query($this -> link,$sql);
      $arr = mysqli_fetch_all($res,MYSQLI_ASSOC);
      for($i = 0 ;$i < count($arr);$i++){
        $brr[] = $arr[$i]['Field'];
      }
      $this -> zd = $brr;
      return $brr;
    }
    public function __call($name,$value){
      $name = strtolower($name);
      if(array_key_exists($name,$this -> method)){
        if($name == 'order'){
          $this -> method['order'] = " order by ".$value[0];
        }elseif($name == 'group'){
        $this -> method['group'] = " group by ".$value[0];
        }else{
          $this -> method[$name] = " {$name} ".$value[0];
        }
      }else{
        return "the method is not found!";
      }
      return $this;
    }
    public function method(){
      return " {$this -> method['where']} {$this -> method['order']} {$this -> method['limit']} {$this -> method['group']} {$this -> method['having']}; ";
    }
    public function find($a="*"){
      if(in_array("{$a}",$this -> zd) || $a == "*"){
        $sql = "select {$a} from {$this -> tableName} {$this -> method()} ";
      }else{
        $sql = "select * from {$this -> tableName}";
      }
      //return $sql;
      $res = mysqli_query($this -> link,$sql);
      $arr = mysqli_fetch_all($res,MYSQLI_ASSOC);
      return $arr;
    }
}
<?php
class Mysql{
  private $LocalHost = 'localhost';
  private $LoaclUser = '';
  private $LocalPass = '';
  private $LocalBase = '';
  private $LocalCode = 'UTF8';
  private $PreFix;
  private $Conn;
  private $Start   = 0;
  private $Error   = false; //数据库连接状态, false表示未连接或连接不正常
  public $Err    = true; //Sql执行结果
  private $Table;
  private $Field   = '*';
  private $Where   = '';
  private $Order   = '';
  private $PageSize = 0; //分页显示->每页多少条,0为不分页显示
  private $PageCount = 1; //分页显示->总共有多少条
  private $PageNum  = 1; //分页显示->总共有多少页
  private $PageNo  = 1; //分页显示->当前第几页
  private $PageKey  = 'page'; //分页url参数键
  private $PageStart = 0; //分页显示->当前从第几条开始返回
  private $Select;
  private $Rest;
  private $Result  = false;//结果集
  public $FormArray = array();
  public $Instr_ID = 0;
  private $j = 0;
  public function Parameter($Loca, $Root, $Pass, $Base, $Code, $PreFix = ''){
    $this->LoaclUser = $Root;
    $this->LocalBase = $Base;
    $this->LocalCode = $Code;
    $this->LocalHost = $Loca;
    $this->LocalPass = $Pass;
    $this->PreFix  = $PreFix;
    return $this;
  }
  private function Connection( $Sql ){
    !function_exists(mysqli_connect) ? die('查询失败,无法加载mysqli扩展') : null;
    $this->Conn = @new mysqli( $this->LocalHost, $this->LoaclUser, $this->LocalPass, $this->LocalBase);
    $this->Error = mysqli_connect_errno() == 0 ? true : false;
    !$this->Error ? die('数据库连接错误,请检查数据库连接参数') : null;
    $this->Conn->query('SET NAMES ' . $this->LocalCode);
    $this->Rest = $this->Conn->query($Sql);
    $this->Err = mysqli_error($this->Conn);
    $this->Instr_ID = mysqli_insert_id($this->Conn);
    $this->Rest->free_result;
    $this->Conn->close;
    $this -> FormArray = '';
    return $this;
  }
  public function null(){
    $this->PageSize = 0;
    //$this->PageCount = 1;
    $this->PageStart = 1;
    $this->Field   = ' * ';
    $this->Select  = '';
    unset($this->Table, $this->Where,$this->Order, $this->Result);
  }
  public function Table( $TableName ) {//数据表
   $this -> null();
   $this->Table = '`' . $this->PreFix . $TableName . '`';
   return $this;
  }
  public function Field( $Array = '*' ) {//数据字段
   !empty( $this->Field ) ? $this->Field = '' : null;
   $Array = explode(',', $Array);
   foreach ( $Array as $field ) {
     $this->Field .= !$this->Start ? '`' . $field . '`' : ', `' . $field . '`';
     $this->Start++;
   }
   $this->Start = 0;
   return $this;
  }
  public function Where( $Where ) {//条件
    $this->Where = ' where ' .$Where;
    return $this;
  }
  public function Order( $Order ) {//排序
   $this->Order = ' order by ' . $Order;
   return $this;
  }
  public function pk( $key ) {//分页url参数键
   $this->PageKey = $key;
   return $this;
  }
  public function Page( $PageSize ) {//分页
   $this->PageSize = $PageSize;
   $this->PageNo  = $this->get( $this->PageKey );
   $this->PageNo  = empty( $this->PageNo ) || !isset( $this->PageNo ) || !is_numeric( $this->PageNo ) || $this->PageNo < 1 ? 1 : $this->PageNo;
   return $this;
  }
  public function post( $Key, $Filter = true ){
    return $Filter ? strip_tags($_POST[$Key]) : $_POST[$Key];
  }
  public function get( $Key, $Filter = true ){
    return $Filter ? strip_tags($_GET[$Key]) : $_GET[$Key];
  }
  public function Sel(){
    $this->Select = 'Select ' . $this->Field . ' from ' . $this->Table . $this->Where . $this->Order;
    $this->Connection( $this->Select );
    if ( $this->Rest->num_rows ) {
     while ( $Rs = $this->Rest->fetch_assoc() ) {
       $this->Result[] = $Rs;
     }
    }
    $DataBase = $this->Result;
    return empty($DataBase) ? false : $DataBase;
  }
  public function querys( $Sql = '', $Type = 'not', $biao = false ) {
    $this->Select = $Sql;
    $this->Connection( $this->Select );
    if ( $this->Rest->num_rows ) {
    if ( !$biao ) {
     while ( $Rs = $this->Rest->fetch_array() ) {
       $this->Result[] = !preg_match('/^\d+$/i', $Type) ? $Rs : $Rs[ $Type ];
     }
    } else {
     while ( $Rs = $this->Rest->fetch_assoc() ) {
       $this->Result[] = $Rs;
     }
    }
    }
    $DataBase = $this->Result;
    return empty($DataBase) ? false : $DataBase;
  }
  public function executes( $Sql = '' ){
    $this->Connection( $Sql );
    return $this->Rest;
  }
  public function exists( $T = '', $F = '', $W = ''){
    if ( empty( $F ) ) { return 0; }
    $cmd = empty( $W ) ? 'Select sum(' . $F . ') as `baiyinum` from `' . $this->PreFix . $T .'`' : 'Select sum(' . $F . ') as `baiyinum` from `' . $this->PreFix . $T .'` Where ' . $W;
    $this->Connection( $cmd );
    unset( $T, $F, $W, $cmd );
    $Rel = $this->Rest->fetch_array();
    return round( $Rel['baiyinum'], 2 );
  }
  public function ExistsTo( $Bili = 10000, $T = '', $F = '', $W = ''){
    if ( empty( $F ) ) { return 0; }
    $cmd = empty( $W ) ? 'Select sum(' . $F . ') as `baiyinum` from `' . $this->PreFix . $T .'`' : 'Select sum(' . $F . ') as `baiyinum` from `' . $this->PreFix . $T .'` Where ' . $W;
    $this->Connection( $cmd );
    unset( $T, $F, $W, $cmd );
    $Rel = $this->Rest->fetch_array();
    return round( $Rel['baiyinum'] * $Bili );
  }
  public function Select( $Type = true, $ListNum = 1 ){ //返回记录(数组形式, 返回条数)
   $this->Select = 'Select ' . $this->Field . ' from ' . $this->Table . $this->Where . $this->Order;
   if ( is_numeric( $ListNum ) ) {
    if ( $this->PageSize > 0 ) {
      $this->Connection( $this->Select );//执行查询
      $this->PageCount = $this->Rest->num_rows;//取得记录总数
      $this->PageNum  = ceil($this->PageCount / $this->PageSize); //总共有多少页
      $this->PageNo  = $this->PageNo > $this->PageNum ? $this->PageNum : $this->PageNo;
      $this->PageStart = ( $this->PageNo - 1 ) * $this->PageSize;  //当前从第几条开始返回
      $this->Select  .= ' limit ' . $this->PageStart . ', ' .$this->PageSize; //重新构造sql语句
    } else {
      $this->Select  .= ' limit ' . $ListNum; //重新构造sql语句
    }
   } else {
      $this->Select  .= ' limit 1'; //重新构造sql语句
   }
   //echo $this->Select;
   $this->Connection( $this->Select );//再次执行查询
   if ( $this->Rest->num_rows ) {//如果记录存在
    if ( $Type ) {
     while ( $Rs = $this->Rest->fetch_array() ) {
       $this->Result[] = $Rs;
     }
    }else{
     while ( $Rs = $this->Rest->fetch_assoc() ) {
       $this->Result[] = $Rs;
     }
    }
   }
   if ( ( $ListNum == 1 or !is_numeric( $ListNum ) ) && !$this->PageSize) { $this->Result = $this->Result[0]; }
   $DataBase = $this->Result;
   return empty($DataBase) ? false : $DataBase;
  }
  public function Num() { //返回记录总数
   $this->Select = 'Select ' . $this->Field . ' from ' . $this->Table . $this->Where . $this->Order;
   $this->Connection( $this->Select );//执行查询
   return $this->Rest->num_rows;//取得记录总数
  }
  public function PageNav($NumNav = false ) { //分页
   $Action = $this -> get('action');
   !empty( $Action ) or $Action = 'index';
   $Module = $this -> get('module');
   !empty( $Module ) or $Module = 'index';
   $NavUrl  = '/' . $Module . '/' . $Action . '/' . $this -> PageKey .'/';
   $NaIndex = '/' . $Module . '/' . $Action;
   $PageHtml = "\n<div class=\"pagenav\">";
   $PageHtml .= '' . $this->PageCount . '条记录    ' . $this->PageNo . '/' . $this->PageNum . '页      ';
   $this->PageNo <= 1 or $PageHtml .= "<a href=\"" . $NaIndex . "\">首页</a>\n<a href=\"" . $NavUrl . ($this->PageNo - 1) . "\">上一页</a>\n";
  if ( $NumNav ) { $PageHtml .= $this->NumPage($NavUrl); }
  $this->PageNo >= $this->PageNum or $PageHtml .= "<a href=\"" . $NavUrl. ($this->PageNo + 1) . "\">下一页</a>\n<a href=\"" . $NavUrl . $this->PageNum . "\">尾页</a>\n";
  $PageHtml .= "</div>\n";
  return $PageHtml;
  }
  private function NumPage( $Can = '' ) { //数字分页
    $NumHtml = '';
    $First  = 1;
    $Last  = $this->PageNum;
    if ( $this->PageNum > 5 ) {
      if ( $this->PageNo < $this->PageNum ) {
       $First = $this->PageNo - 2;
       $Last = $this->PageNo + 2;
      }else{
       $First = $this->PageNo - 4;
       $Last = $this->PageNum;
      }
    }
    if ( $First < 1 ) { $First  = 1; $Last = $First + 4;}
    if ( $Last > $this->PageNum ) { $First  = $this->PageNum - 4; $Last = $this->PageNum;}
    for( $i = $First; $i <= $Last; $i++) {
      $NumHtml .= $this->PageNo != $i ? "\n\t" . '<a href="'%20.%20$Can%20.%20$i%20.%20'" rel="external nofollow" >' . $i . '</a>' . "\n\t" : "\n\t" .'<a class="hover" disabled="disabled">' . $i . '</a>' . "\n\t";
    }
    unset($Can, $First, $i, $Last);
    return $NumHtml;
  }
  public function UserPage($NumNav = false, $PageName = 'index', $Mulu = 'user' ) { //会员中心分页
   $NavUrl  = '/' . $Mulu . '/' . $PageName . '/' . $this->PageKey . '/';
   $PageHtml = "\n<div class=\"pagenav\">";
   $PageHtml .= '' . $this->PageCount . '条记录    ' . $this->PageNo . '/' . $this->PageNum . '页      ';
   $this->PageNo <= 1 or $PageHtml .= "<a href=\"" . $NavUrl . "1\">首页</a>\n<a href=\"" . $NavUrl . ($this->PageNo - 1) . "\">上一页</a>\n";
  if ( $NumNav ) { $PageHtml .= $this->NumPage($NavUrl); }
  $this->PageNo >= $this->PageNum or $PageHtml .= "<a href=\"" . $NavUrl. ($this->PageNo + 1) . "\">下一页</a>\n<a href=\"" . $NavUrl . $this->PageNum . "\">尾页</a>\n";
  $PageHtml .= "</div><div class=\"clear\"></div>\n";
  return $PageHtml;
  }
  //表单处理开始
  //判断表单时候提交
  public function FormIs( $Keys = 'mm' ) {
    return $_POST[ $Keys ] == 1 ? true : false;
  }
  //post方式获取数据
  public function _post( $Keys = '', $TiHuan = '') {
    $Values = strip_tags( $_POST[ $Keys ] );
    $this->FormArray[$Keys] = empty( $Values ) ? $TiHuan : $Values;
    return empty( $Values ) ? $TiHuan : $Values;
  }
  //get方法获取数据
  public function _get( $Keys = '', $TiHuan = '') {
    $Values = strip_tags( $_GET[ $Keys ] );
    return empty( $Values ) ? $TiHuan : $Values;
  }
  //判断是否为数字并且不小于0
  public function IsNum( $Num = 0, $Mesg = '参数必须为数字' ) {
    if ( is_numeric( $Num ) && !empty( $Num ) && $Num >= 0 ) {
      return $Num;
    }else{
      die( $Mesg );
    }
  }
  //判断是否为数字并且不小于0返回True/False
  public function NumBer( $Num = 0) {
     return is_numeric( $Num ) && !empty( $Num ) && $Num >= 0 ? true : false;
  }
  //检测相关数据似乎存在
  public function IsData($Types = true, $memg = '数据已经存在' ){
    $this->Connection('select ' . $this->Field . ' from ' . $this->Table . $this->Where);
    if ( $Types ){
      $this->Rest->num_rows > 0 ? die( $memg ) : null;
    } else {
      return $this->Rest->num_rows;
    }
  }
  //写入数据库记录
  public function into( $Mesg = '' ){
    !is_array( $this->FormArray ) ? die( $Mesg ) : null;
    $Sql = 'insert into ' . $this->Table . ' (`';
    $I  = 0;
    foreach ( $this->FormArray as $Key => $Val ){
      $Duan .= !$I ? $Key . '`' : ', `' . $Key . '`';
      if ( is_numeric( $Val ) ){
        $Vals .= !$I ? $Val : ', ' . $Val;
      }else{
        $Vals .= !$I ? '\'' . $Val . '\'' : ', \'' . $Val . '\'';
      }
      $I++;
    }
    $Sql .= $Duan . ') values (' . $Vals . ')';
    //@file_put_contents('1.sql', $Sql, FILE_APPEND);
    $this->Connection( $Sql );
    return !empty( $this->Err ) ? false : true;
  }
  //数组形式写入数据
  public function MsgBox( $Table = '', $Filed = array() ) {
    $this -> Table($Table);
    foreach( $Filed as $Key => $Val ) {
     $this -> FormArray[ $Key ] = $Val;
    }
   return $this -> Into('未取得数据');
  }
  //修改数据库记录
  public function Edit( $Array = array() ) {
    if ( empty( $Array ) ) { $Array = $this -> FormArray; }
    if ( !is_array( $Array ) || empty( $Array ) ) {
      return false;
    } else {
     $Sql = 'update ' . $this -> Table . ' set ';
     $I  = 0;
     $Sub = '';
     $Huan = array('-' => '[jian]', '+' => '[jia]', '*' => '[cheng]', '/' => '[chu]');
     $Zhan = array('[jian]' => '-', '[jia]' => '+', '[cheng]' => '*', '[chu]' => '/');
     foreach ( $Array as $Files => $Val ) {
       $Val = !is_numeric( $Val ) && !preg_match('/\`\w+\`\s*(\+|\-|\*|\/)/i', $Val) ? '\'' . $Val . '\'' : $Val;
       foreach ( $Huan as $key => $val ){
         $Val = str_replace($key, $val, $Val);
       }
       $duan = !$I ? '`' . $Files . '` = ' : ', `' . $Files . '` = ';
       $Sub .= $duan . $Val;
       $I++;
     }
     $Sql .= $Sub . $this -> Where;
     foreach ( $Zhan as $Fan => $Hui ) {
       $Sql = str_replace($Fan, $Hui, $Sql);
     }
     //echo $Sql; die;
    $this -> Connection( $Sql );
    unset( $Array, $duan, $Fan, $Files, $Huan, $Hui, $I, $key, $Sql, $Sub, $Val, $Zhan, $val );
    return !empty( $this -> Err ) ? false : true;
   }
  }
  //删除数据库记录
  public function del(){
    $Sql = 'delete from ' . $this->Table . $this->Where;
    $this->Connection( $Sql );
    unset($Sql);
    return !empty( $this->Err ) ? false : true;
  }
  //表单处理结束
  //页面跳转
  public function Msg( $Text = '操作成功' ) {
    echo '<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />';
    echo '<script type="text/javascript">
 <!--
  alert("' . $Text . '");
  document.location="' . $_SERVER['HTTP_REFERER'] . '";
 //-->
</script>';
 exit;
  }
  #取得系统当前时间
  public function Times(){
    return str_replace('-', '[jian]', date('Y-m-d H:i:s'));
  }
  #取得用户IP地址
  public function GetIP(){
   if (getenv("HTTP_CLIENT_IP") && strcasecmp(getenv("HTTP_CLIENT_IP"), "unknown"))
    $ip = getenv("HTTP_CLIENT_IP");
    else if (getenv("HTTP_X_FORWARDED_FOR") && strcasecmp(getenv("HTTP_X_FORWARDED_FOR"), "unknown"))
    $ip = getenv("HTTP_X_FORWARDED_FOR");
    else if (getenv("REMOTE_ADDR") && strcasecmp(getenv("REMOTE_ADDR"), "unknown"))
    $ip = getenv("REMOTE_ADDR");
    else if (isset($_SERVER['REMOTE_ADDR']) && $_SERVER['REMOTE_ADDR'] && strcasecmp($_SERVER['REMOTE_ADDR'], "unknown"))
    $ip = $_SERVER['REMOTE_ADDR'];
    else
    $ip = "unknown";
   return($ip);
  }
  //最后关闭数据库连接
  public function Close(){
    !is_object( $this -> Conn ) or mysqli_close( $this -> Conn );
  }
}
extension=php_pdo.dll

用法示例:

更多关于PHP相关内容感兴趣的读者可查看本站专题:《php+mysqli数据库程序设计技巧总结》、《php面向对象程序设计入门教程》、《PHP数组(Array)操作技巧大全》、《PHP基本语法入门教程》、《php字符串(string)用法总结》、《php+mysql数据库操作入门教程》及《php常见数据库操作技巧汇总》

为了启用对某个数据库的支持,需要在php配置文件中将相应的扩展打开,例如要支持MySQL,需要开启下面的扩展

<?php
  function __autoload($className){
    require($className.".class.php");
  }
  $a = new Model("stu");
  $a -> where("name = 'zhu'")->limit("5,10");
  var_dump($a -> find("name"));

希望本文所述对大家PHP程序设计有所帮助。

extension=php_pdo_mysql.dll

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下面是使用PDO对mysql进行基本的增删改查操作

希望本文所述对大家PHP程序设计有所帮助。

创建test数据库,然后运行以下SQL语句:

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DROP TABLE IF EXISTS `test`;
CREATE TABLE `test` (
`id` int(10) NOT NULL DEFAULT '0',
`user` char(20) DEFAULT NULL,
PRIMARY KEY (`id`),
KEY `idx_age` (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

程序代码:

<?php
header("content-type:text/html;charset=utf-8");
$dsn="mysql:dbname=test;host=localhost";
$db_user='root';
$db_pass='admin123';
try{
$pdo=new PDO($dsn,$db_user,$db_pass);
}catch(PDOException $e){
echo '数据库连接失败'.$e->getMessage();
}
//新增
$sql="insert into test (id,user) values (1,'phpthinking')";
$res=$pdo->exec($sql);
echo '影响行数:'.$res;
//修改
$sql="update test set user='phpthinking' where id=1";
$res=$pdo->exec($sql);
echo '影响行数:'.$res;
//查询
$sql="select * from test";
$res=$pdo->query($sql);
foreach($res as $row){
echo $row['user'].'<br/>';
}
//删除
$sql="delete from test where id=1";
$res=$pdo->exec($sql);
echo '影响行数:'.$res;

更多关于PHP相关内容感兴趣的读者可查看本站专题:《PHP基于pdo操作数据库技巧总结》、《php+Oracle数据库程序设计技巧总结》、《PHP+MongoDB数据库操作技巧大全》、《php面向对象程序设计入门教程》、《php字符串(string)用法总结》、《php+mysql数据库操作入门教程》及《php常见数据库操作技巧汇总》

希望本文所述对大家PHP程序设计有所帮助。

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