PHP は、mysql (MySQL および MySQLi モード) 操作クラスを実装します。

<?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 &#39;$this->ut&#39;");
  }
  function query($sql, $type = &#39;&#39;) {
    if(!($query = mysql_query($sql))) $this->show(&#39;Say:&#39;, $sql);
    return $query;
  }
  function show($message = &#39;&#39;, $sql = &#39;&#39;) {
    if(!$sql) echo $message;
    else echo $message.&#39;<br>&#39;.$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(&#39;test&#39;,&#39;id,name,sex&#39;,"&#39;&#39;,&#39;hongtenzone&#39;,&#39;M&#39;");
$db->fn_delete(&#39;test&#39;, &#39;id&#39;, 1);
?>

<?php
class Mysql{
  private $LocalHost = &#39;localhost&#39;;
  private $LoaclUser = &#39;&#39;;
  private $LocalPass = &#39;&#39;;
  private $LocalBase = &#39;&#39;;
  private $LocalCode = &#39;UTF8&#39;;
  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   = &#39;*&#39;;
  private $Where   = &#39;&#39;;
  private $Order   = &#39;&#39;;
  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  = &#39;page&#39;; //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 = &#39;&#39;){
    $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(&#39;查询失败，无法加载mysqli扩展&#39;) : null;
    $this->Conn = @new mysqli( $this->LocalHost, $this->LoaclUser, $this->LocalPass, $this->LocalBase);
    $this->Error = mysqli_connect_errno() == 0 ? true : false;
    !$this->Error ? die(&#39;数据库连接错误，请检查数据库连接参数&#39;) : null;
    $this->Conn->query(&#39;SET NAMES &#39; . $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 = &#39;&#39;;
    return $this;
  }
  public function null(){
    $this->PageSize = 0;
    //$this->PageCount = 1;
    $this->PageStart = 1;
    $this->Field   = &#39; * &#39;;
    $this->Select  = &#39;&#39;;
    unset($this->Table, $this->Where,$this->Order, $this->Result);
  }
  public function Table( $TableName ) {//数据表
   $this -> null();
   $this->Table = &#39;`&#39; . $this->PreFix . $TableName . &#39;`&#39;;
   return $this;
  }
  public function Field( $Array = &#39;*&#39; ) {//数据字段
   !empty( $this->Field ) ? $this->Field = &#39;&#39; : null;
   $Array = explode(&#39;,&#39;, $Array);
   foreach ( $Array as $field ) {
     $this->Field .= !$this->Start ? &#39;`&#39; . $field . &#39;`&#39; : &#39;, `&#39; . $field . &#39;`&#39;;
     $this->Start++;
   }
   $this->Start = 0;
   return $this;
  }
  public function Where( $Where ) {//条件
    $this->Where = &#39; where &#39; .$Where;
    return $this;
  }
  public function Order( $Order ) {//排序
   $this->Order = &#39; order by &#39; . $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 = &#39;Select &#39; . $this->Field . &#39; from &#39; . $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 = &#39;&#39;, $Type = &#39;not&#39;, $biao = false ) {
    $this->Select = $Sql;
    $this->Connection( $this->Select );
    if ( $this->Rest->num_rows ) {
    if ( !$biao ) {
     while ( $Rs = $this->Rest->fetch_array() ) {
       $this->Result[] = !preg_match(&#39;/^\d+$/i&#39;, $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 = &#39;&#39; ){
    $this->Connection( $Sql );
    return $this->Rest;
  }
  public function exists( $T = &#39;&#39;, $F = &#39;&#39;, $W = &#39;&#39;){
    if ( empty( $F ) ) { return 0; }
    $cmd = empty( $W ) ? &#39;Select sum(&#39; . $F . &#39;) as `baiyinum` from `&#39; . $this->PreFix . $T .&#39;`&#39; : &#39;Select sum(&#39; . $F . &#39;) as `baiyinum` from `&#39; . $this->PreFix . $T .&#39;` Where &#39; . $W;
    $this->Connection( $cmd );
    unset( $T, $F, $W, $cmd );
    $Rel = $this->Rest->fetch_array();
    return round( $Rel[&#39;baiyinum&#39;], 2 );
  }
  public function ExistsTo( $Bili = 10000, $T = &#39;&#39;, $F = &#39;&#39;, $W = &#39;&#39;){
    if ( empty( $F ) ) { return 0; }
    $cmd = empty( $W ) ? &#39;Select sum(&#39; . $F . &#39;) as `baiyinum` from `&#39; . $this->PreFix . $T .&#39;`&#39; : &#39;Select sum(&#39; . $F . &#39;) as `baiyinum` from `&#39; . $this->PreFix . $T .&#39;` Where &#39; . $W;
    $this->Connection( $cmd );
    unset( $T, $F, $W, $cmd );
    $Rel = $this->Rest->fetch_array();
    return round( $Rel[&#39;baiyinum&#39;] * $Bili );
  }
  public function Select( $Type = true, $ListNum = 1 ){ //返回记录（数组形式， 返回条数）
   $this->Select = &#39;Select &#39; . $this->Field . &#39; from &#39; . $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  .= &#39; limit &#39; . $this->PageStart . &#39;, &#39; .$this->PageSize; //重新构造sql语句
    } else {
      $this->Select  .= &#39; limit &#39; . $ListNum; //重新构造sql语句
    }
   } else {
      $this->Select  .= &#39; limit 1&#39;; //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 = &#39;Select &#39; . $this->Field . &#39; from &#39; . $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(&#39;action&#39;);
   !empty( $Action ) or $Action = &#39;index&#39;;
   $Module = $this -> get(&#39;module&#39;);
   !empty( $Module ) or $Module = &#39;index&#39;;
   $NavUrl  = &#39;/&#39; . $Module . &#39;/&#39; . $Action . &#39;/&#39; . $this -> PageKey .&#39;/&#39;;
   $NaIndex = &#39;/&#39; . $Module . &#39;/&#39; . $Action;
   $PageHtml = "\n<p class=\"pagenav\">";
   $PageHtml .= &#39;<span>&#39; . $this->PageCount . &#39;条记录    &#39; . $this->PageNo . &#39;/&#39; . $this->PageNum . &#39;页</span>      &#39;;
   $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 .= "</p>\n";
  return $PageHtml;
  }
  private function NumPage( $Can = &#39;&#39; ) { //数字分页
    $NumHtml = &#39;&#39;;
    $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" . &#39;<a href="&#39; . $Can . $i . &#39;" rel="external nofollow" >&#39; . $i . &#39;</a>&#39; . "\n\t" : "\n\t" .&#39;<a class="hover" disabled="disabled">&#39; . $i . &#39;</a>&#39; . "\n\t";
    }
    unset($Can, $First, $i, $Last);
    return $NumHtml;
  }
  public function UserPage($NumNav = false, $PageName = &#39;index&#39;, $Mulu = &#39;user&#39; ) { //会员中心分页
   $NavUrl  = &#39;/&#39; . $Mulu . &#39;/&#39; . $PageName . &#39;/&#39; . $this->PageKey . &#39;/&#39;;
   $PageHtml = "\n<p class=\"pagenav\">";
   $PageHtml .= &#39;<span>&#39; . $this->PageCount . &#39;条记录    &#39; . $this->PageNo . &#39;/&#39; . $this->PageNum . &#39;页</span>      &#39;;
   $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 .= "</p><p class=\"clear\"></p>\n";
  return $PageHtml;
  }
  //表单处理开始
  //判断表单时候提交
  public function FormIs( $Keys = &#39;mm&#39; ) {
    return $_POST[ $Keys ] == 1 ? true : false;
  }
  //post方式获取数据
  public function _post( $Keys = &#39;&#39;, $TiHuan = &#39;&#39;) {
    $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 = &#39;&#39;, $TiHuan = &#39;&#39;) {
    $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 = &#39;参数必须为数字&#39; ) {
    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 = &#39;数据已经存在&#39; ){
    $this->Connection(&#39;select &#39; . $this->Field . &#39; from &#39; . $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 = &#39;&#39; ){
    !is_array( $this->FormArray ) ? die( $Mesg ) : null;
    $Sql = &#39;insert into &#39; . $this->Table . &#39; (`&#39;;
    $I  = 0;
    foreach ( $this->FormArray as $Key => $Val ){
      $Duan .= !$I ? $Key . &#39;`&#39; : &#39;, `&#39; . $Key . &#39;`&#39;;
      if ( is_numeric( $Val ) ){
        $Vals .= !$I ? $Val : &#39;, &#39; . $Val;
      }else{
        $Vals .= !$I ? &#39;\&#39;&#39; . $Val . &#39;\&#39;&#39; : &#39;, \&#39;&#39; . $Val . &#39;\&#39;&#39;;
      }
      $I++;
    }
    $Sql .= $Duan . &#39;) values (&#39; . $Vals . &#39;)&#39;;
    //@file_put_contents(&#39;1.sql&#39;, $Sql, FILE_APPEND);
    $this->Connection( $Sql );
    return !empty( $this->Err ) ? false : true;
  }
  //数组形式写入数据
  public function MsgBox( $Table = &#39;&#39;, $Filed = array() ) {
    $this -> Table($Table);
    foreach( $Filed as $Key => $Val ) {
     $this -> FormArray[ $Key ] = $Val;
    }
   return $this -> Into(&#39;未取得数据&#39;);
  }
  //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 = &#39;update &#39; . $this -> Table . &#39; set &#39;;
     $I  = 0;
     $Sub = &#39;&#39;;
     $Huan = array(&#39;-&#39; => &#39;[jian]&#39;, &#39;+&#39; => &#39;[jia]&#39;, &#39;*&#39; => &#39;[cheng]&#39;, &#39;/&#39; => &#39;[chu]&#39;);
     $Zhan = array(&#39;[jian]&#39; => &#39;-&#39;, &#39;[jia]&#39; => &#39;+&#39;, &#39;[cheng]&#39; => &#39;*&#39;, &#39;[chu]&#39; => &#39;/&#39;);
     foreach ( $Array as $Files => $Val ) {
       $Val = !is_numeric( $Val ) && !preg_match(&#39;/\`\w+\`\s*(\+|\-|\*|\/)/i&#39;, $Val) ? &#39;\&#39;&#39; . $Val . &#39;\&#39;&#39; : $Val;
       foreach ( $Huan as $key => $val ){
         $Val = str_replace($key, $val, $Val);
       }
       $duan = !$I ? &#39;`&#39; . $Files . &#39;` = &#39; : &#39;, `&#39; . $Files . &#39;` = &#39;;
       $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 = &#39;delete from &#39; . $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 = &#39;操作成功&#39; ) {
    echo &#39;<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />&#39;;
    echo &#39;<script type="text/javascript">
 <!--
  alert("&#39; . $Text . &#39;");
  document.location="&#39; . $_SERVER[&#39;HTTP_REFERER&#39;] . &#39;";
 //-->
</script>&#39;;
 exit;
  }
  #取得系统当前时间
  public function Times(){
    return str_replace(&#39;-&#39;, &#39;[jian]&#39;, date(&#39;Y-m-d H:i:s&#39;));
  }
  #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[&#39;REMOTE_ADDR&#39;]) && $_SERVER[&#39;REMOTE_ADDR&#39;] && strcasecmp($_SERVER[&#39;REMOTE_ADDR&#39;], "unknown"))
    $ip = $_SERVER[&#39;REMOTE_ADDR&#39;];
    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 );
  }
}