這篇文章主要介紹了php實現的mysql數據庫操作類，本文最後有使用方法,需要的朋友可以參考下
代碼如下: <?php /* 數據庫操作類 */ class Mysql{ private $LocalHost = 'localhost'; private $LoaclUser = 'root'; private $LocalPass = '123456'; private $LocalBase = 'jiangxibaiyi'; private $LocalCode = 'UTF8'; private $PreFix; private $Conn; private $Start = 0; private $Error = false; //數據庫連接狀態, false表示未連接或連接不正常 public $Err = true; //Sql執行結果 private $Table; private $Field = '*'; private $Where = ''; private $Order = ''; private $PageSize = 0; //分頁顯示->每頁多少條，0為不分頁顯示 private $PageCount = 1; //分頁顯示->總共有多少條 private $PageNum = 1; //分頁顯示->總共有多少頁 private $PageNo = 1; //分頁顯示->當前第幾頁 private $PageKey = 'page'; //分頁url參數鍵 private $PageStart = 0; //分頁顯示->當前從第幾條開始返回 private $Select; private $Rest; private $Result = false;//結果集 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('查詢失敗，無法加載mysqli擴展') : null; $this->Conn = @new mysqli( $this->LocalHost, $this->LoaclUser, $this->LocalPass, $this->LocalBase); $this->Error = mysqli_connect_errno() == 0 ? true : false; !$this->Error ? die('數據庫連接錯誤，請檢查數據庫連接參數') : 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 ) {//數據表 $this -> null(); $this->Table = '`' . $this->PreFix . $TableName . '`'; return $this; } public function Field( $Array = '*' ) {//數據字段 !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 ) {//條件 $this->Where = ' where ' .$Where; return $this; } public function Order( $Order ) {//排序 $this->Order = ' order by ' . $Order; return $this; } public function pk( $key ) {//分頁url參數鍵 $this->PageKey = $key; return $this; } public function Page( $PageSize ) {//分頁 $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 ){ //返回記錄（數組形式， 返回條數） $this->Select = 'Select ' . $this->Field . ' from ' . $this->Table . $this->Where . $this->Order; if ( is_numeric( $ListNum ) ) { if ( $this->PageSize > 0 ) { $this->Connection( $this->Select );//執行查詢 $this->PageCount = $this->Rest->num_rows;//取得記錄總數 $this->PageNum = ceil($this->PageCount / $this->PageSize); //總共有多少頁 $this->PageNo = $this->PageNo > $this->PageNum ? $this->PageNum : $this->PageNo; $this->PageStart = ( $this->PageNo - 1 ) * $this->PageSize; //當前從第幾條開始返回 $this->Select .= ' limit ' . $this->PageStart . ', ' .$this->PageSize; //重新構造sql語句 } else { $this->Select .= ' limit ' . $ListNum; //重新構造sql語句 } } else { $this->Select .= ' limit 1'; //重新構造sql語句 } //echo $this->Select; $this->Connection( $this->Select );//再次執行查詢 if ( $this->Rest->num_rows ) {//如果記錄存在 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() { //返回記錄總數 $this->Select = 'Select ' . $this->Field . ' from ' . $this->Table . $this->Where . $this->Order; $this->Connection( $this->Select );//執行查詢 return $this->Rest->num_rows;//取得記錄總數 } public function PageNav($NumNav = false ) { //分頁 $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 .= '<span>' . $this->PageCount . '條記錄 ' . $this->PageNo . '/' . $this->PageNum . '頁</span> '; $this->PageNo <= 1 or $PageHtml .= "<a href="" . $NaIndex . "">首頁</a>n<a href="" . $NavUrl . ($this->PageNo - 1) . "">上一頁</a>n"; if ( $NumNav ) { $PageHtml .= $this->NumPage($NavUrl); } $this->PageNo >= $this->PageNum or $PageHtml .= "<a href="" . $NavUrl. ($this->PageNo + 1) . "">下一頁</a>n<a href="" . $NavUrl . $this->PageNum . "">尾頁</a>n"; $PageHtml .= "</div>n"; return $PageHtml; } private function NumPage( $Can = '' ) { //數字分頁 $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 ? "nt" . '<a href="' . $Can . $i . '">' . $i . '</a>' . "nt" : "nt" .'<a class="hover" disabled="disabled">' . $i . '</a>' . "nt"; } unset($Can, $First, $i, $Last); return $NumHtml; } public function UserPage($NumNav = false, $PageName = 'index', $Mulu = 'user' ) { //會員中心分頁 $NavUrl = '/' . $Mulu . '/' . $PageName . '/' . $this->PageKey . '/'; $PageHtml = "n<div class="pagenav">"; $PageHtml .= '<span>' . $this->PageCount . '條記錄 ' . $this->PageNo . '/' . $this->PageNum . '頁</span> '; $this->PageNo <= 1 or $PageHtml .= "<a href="" . $NavUrl . "1">首頁</a>n<a href="" . $NavUrl . ($this->PageNo - 1) . "">上一頁</a>n"; if ( $NumNav ) { $PageHtml .= $this->NumPage($NavUrl); } $this->PageNo >= $this->PageNum or $PageHtml .= "<a href="" . $NavUrl. ($this->PageNo + 1) . "">下一頁</a>n<a href="" . $NavUrl . $this->PageNum . "">尾頁</a>n"; $PageHtml .= "</div><div class="clear"></div>n"; return $PageHtml; } //表單處理開始 //判斷表單時候提交 public function FormIs( $Keys = 'mm' ) { return $_POST[ $Keys ] == 1 ? true : false; } //post方式獲取數據 public function _post( $Keys = '', $TiHuan = '') { $Values = strip_tags( $_POST[ $Keys ] ); $this->FormArray[$Keys] = empty( $Values ) ? $TiHuan : $Values; return empty( $Values ) ? $TiHuan : $Values; } //get方法獲取數據 public function _get( $Keys = '', $TiHuan = '') { $Values = strip_tags( $_GET[ $Keys ] ); return empty( $Values ) ? $TiHuan : $Values; } //判斷是否為數字並且不小於0 public function IsNum( $Num = 0, $Mesg = '參數必須為數字' ) { if ( is_numeric( $Num ) && !empty( $Num ) && $Num >= 0 ) { return $Num; }else{ die( $Mesg ); } } //判斷是否為數字並且不小於0返回True/False public function NumBer( $Num = 0) { return is_numeric( $Num ) && !empty( $Num ) && $Num >= 0 ? true : false; } //檢測相關數據似乎存在 public function IsData($Types = true, $memg = '數據已經存在' ){ $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; } } //寫入數據庫記錄 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; } //數組形式寫入數據 public function MsgBox( $Table = '', $Filed = array() ) { $this -> Table($Table); foreach( $Filed as $Key => $Val ) { $this -> FormArray[ $Key ] = $Val; } return $this -> Into('未取得數據'); } //修改數據庫記錄 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; } } //刪除數據庫記錄 public function del(){ $Sql = 'delete from ' . $this->Table . $this->Where; $this->Connection( $Sql ); unset($Sql); return !empty( $this->Err ) ? false : true; } //表單處理結束 //頁面跳轉 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; } #取得系統當前時間 public function Times(){ return str_replace('-', '[jian]', date('Y-m-d H:i:s')); } #取得用戶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); } //最後關閉數據庫連接 public function Close(){ !is_object( $this -> Conn ) or mysqli_close( $this -> Conn ); } } 使用方法： 聲明數據庫對象 $Conn = new Mysql; 加載數據庫參數 $Conn->Parameter(數據庫服務器, 數據庫用戶名, 數據庫密碼, 數據庫名稱, 數據庫編碼, 數據庫表前綴[可為空]); 上面的代碼就已經加載這個類文件進來了，並且初始化了一些數據庫連接參數！ 下面介紹幾個基本是方法函數： 1、 $Conn -> Table(); 選擇數據表，參數是數據表名稱 2、$Conn -> Field(); 選擇的字段名稱，多個用逗號隔開，如不調用這個方法，則返回全部 3、$Conn -> Where(); Sql Where子語句，根據條件篩選 4、$Conn -> Order(); Sql 排序 5、$Conn -> Page(int); 參數是一個正整數數字，如調用這個方法，記錄將分頁顯示 6、$Conn -> Select(布爾值); 執行查詢，返回查詢結果，如果有，則是一個二維數組，如果無，則返回假，參數可省略，如省略，默認為真，返回的數組包含數字元素 7、$Conn -> Del(); 刪除記錄 8、 $Conn -> Edit(array()); 修改記錄，參數是一個一維數組，數組鍵是字段名稱，數組值是字段值 9、$Conn -> Into(array()); 添加記錄，參數是一個一維數組，數組鍵是字段名稱，數組值是字段值。 以上方法可連續調用，比如： 代碼如下: $Rult = $Conn -> Table('user') -> Select(); //查詢返回user表的所有記錄 $Rult = $Conn -> Table('user') -> Page(20) -> Select();//查詢返回user表的所有記錄，並分頁顯示，每頁20條；
