資料庫PDO操作類，網上好多朋友需要的，可以參考下。
class MysqlPdo {
public static $PDOStatement = null;
public static $config = array();
public static $pconnect = false;
public static $error = '';
protected static $link;
public static $connected = false;
public static $dbVersion = null;
public static $queryStr = '';
public static $lastInsertId = null;
public static $numRows = 0;
// 事務指令數
public static $transTimes = 0;
public function __construct($dbConfig=''){
if (!class_exists('PDO')) throw_exception("不支援:PDO");
//若沒有傳輸任何參數，則使用預設的資料定義
if (!is_array($dbConfig)) {
$dbConfig = array(
'hostname' => DB_HOST,
'username' => DB_USER,
'password' => DB_PWD,
'database' => DB_NAME,
'hostport' => DB_PORT,
'dbms' => DB_TYPE,
'dsn' => DB_TYPE.":host=".DB_HOST.";dbname=".DB_NAME
);
}
if(empty($dbConfig['hostname'])) throw_exception("沒有定義資料庫配置");
self::$config = $dbConfig;
if(empty(self::$config['params'])) self::$config['params'] = array();
if (!isset(self::$link) ) {
$configs = self::$config;
if(self::$pconnect) {
$configs['params'][constant('PDO::ATTR_PERSISTENT')] = true;
}
try {
self::$link = new PDO( $configs['dsn'], $configs['username'], $configs['password'],$configs['params']);
} catch (PDOException $e) {
throw_exception($e->getMessage());
//exit('連接配接失敗:'.$e->getMessage());
}
if(!self::$link) {
throw_exception('PDO CONNECT ERROR');
return false;
}
self::$link->exec('SET NAMES '.DB_CHARSET);
self::$dbVersion = self::$link->getAttribute(constant("PDO::ATTR_SERVER_INFO"));
// 标記連接配接成功
self::$connected = true;
// 登出資料庫連接配接配置資訊
unset($configs);
}
return self::$link;
}
static function free() {
self::$PDOStatement = null;
}
static function getAll($sql=null) {
self::query($sql);
//傳回資料集
$result = self::$PDOStatement->fetchAll(constant('PDO::FETCH_ASSOC'));
return $result;
}
static function getRow($sql=null) {
self::query($sql);
// 傳回數組集
$result = self::$PDOStatement->fetch(constant('PDO::FETCH_ASSOC'),constant('PDO::FETCH_ORI_NEXT'));
return $result;
}
static function doSql($sql='') {
if(self::isMainIps($sql)) {
return self::execute($sql);
}else {
return self::getAll($sql);
}
}
static function findById($tabName,$priId,$fields='*'){
$sql = 'SELECT %s FROM %s WHERE id=%d';
return self::getRow(sprintf($sql, self::parseFields($fields), $tabName, $priId));
}
static function find($tables,$where="",$fields='*',$order=null,$limit=null,$group=null,$having=null) {
$sql = 'SELECT '.self::parseFields($fields)
.' FROM '.$tables
.self::parseWhere($where)
.self::parseGroup($group)
.self::parseHaving($having)
.self::parseOrder($order)
.self::parseLimit($limit);
$dataAll = self::getAll($sql);
if(count($dataAll)==1){$rlt=$dataAll[0];}else{$rlt=$dataAll;}
return $rlt;
}
static function add($data,$table) {
//過濾送出資料
$data=self::filterPost($table,$data);
foreach ($data as $key=>$val){
if(is_array($val) && strtolower($val[0]) == 'exp') {
$val = $val[1]; // 使用表達式 ???
}elseif (is_scalar($val)){
$val = self::fieldFormat($val);
}else{
// 去掉複合對象
continue;
}
$data[$key] = $val;
}
$fields = array_keys($data);
array_walk($fields, array($this, 'addSpecialChar'));
$fieldsStr = implode(',', $fields);
$values = array_values($data);
$valuesStr = implode(',', $values);
$sql = 'INSERT INTO '.$table.' ('.$fieldsStr.') VALUES ('.$valuesStr.')';
return self::execute($sql);
}
static function update($sets,$table,$where,$limit=0,$order='') {
$sets = self::filterPost($table,$sets);
$sql = 'UPDATE '.$table.' SET '.self::parseSets($sets).self::parseWhere($where).self::parseOrder($order).self::parseLimit($limit);
return self::execute($sql);
}
static function setField($field, $value, $table, $condition="", $asString=false) {
// 如果有'(' 視為 SQL指令更新 否則 更新字段内容為純字元串
if(false === strpos($value,'(') || $asString) $value = '"'.$value.'"';
$sql = 'UPDATE '.$table.' SET '.$field.'='.$value.self::parseWhere($condition);
return self::execute($sql);
}
static function remove($where,$table,$limit='',$order='') {
$sql = 'DELETE FROM '.$table.self::parseWhere($where).self::parseOrder($order).self::parseLimit($limit);
return self::execute($sql);
}
static function saveOrUpdate($tabName, $aPost, $priId="", $aNot="", $aCustom="", $isExits=false) {
if(empty($tabName) || !is_array($aPost) || is_int($aNot)) return false;
if(is_string($aNot) && !empty($aNot)) $aNot = array($aNot);
if(is_array($aNot) && is_int(key($aNot))) $aPost = array_diff_key($aPost, array_flip($aNot));
if(is_array($aCustom) && is_string(key($aCustom))) $aPost = array_merge($aPost,$aCustom);
if (empty($priId) && !$isExits) { //新增
$aPost = array_filter($aPost, array($this, 'removeEmpty'));
return self::add($aPost, $tabName);
} else { //修改
return self::update($aPost, $tabName, "id=".$priId);
}
}
static function getLastSql() {
$link = self::$link;
if ( !$link ) return false;
return self::$queryStr;
}
static function getLastInsId(){
$link = self::$link;
if ( !$link ) return false;
return self::$lastInsertId;
}
static function getDbVersion(){
$link = self::$link;
if ( !$link ) return false;
return self::$dbVersion;
}
static function getTables() {
$info = array();
if(self::query("SHOW TABLES")) {
$result = self::getAll();
foreach ($result as $key => $val) {
$info[$key] = current($val);
}
}
return $info;
}
static function getFields($tableName) {
// 擷取資料庫聯接
$link = self::$link;
$sql = "SELECT
ORDINAL_POSITION ,COLUMN_NAME, COLUMN_TYPE, DATA_TYPE,
IF(ISNULL(CHARACTER_MAXIMUM_LENGTH), (NUMERIC_PRECISION + NUMERIC_SCALE), CHARACTER_MAXIMUM_LENGTH) AS MAXCHAR,
IS_NULLABLE, COLUMN_DEFAULT, COLUMN_KEY, EXTRA, COLUMN_COMMENT
FROM
INFORMATION_SCHEMA.COLUMNS
WHERE
TABLE_NAME = :tabName AND TABLE_SCHEMA='".DB_NAME."'";
self::$queryStr = sprintf($sql, $tableName);
$sth = $link->prepare($sql);
$sth->bindParam(':tabName', $tableName);
$sth->execute();
$result = $sth->fetchAll(constant('PDO::FETCH_ASSOC'));
$info = array();
foreach ($result as $key => $val) {
$info[$val['COLUMN_NAME']] = array(
'postion' => $val['ORDINAL_POSITION'],
'name' => $val['COLUMN_NAME'],
'type' => $val['COLUMN_TYPE'],
'd_type' => $val['DATA_TYPE'],
'length' => $val['MAXCHAR'],
'notnull' => (strtolower($val['IS_NULLABLE']) == "no"),
'default' => $val['COLUMN_DEFAULT'],
'primary' => (strtolower($val['COLUMN_KEY']) == 'pri'),
'autoInc' => (strtolower($val['EXTRA']) == 'auto_increment'),
'comment' => $val['COLUMN_COMMENT']
);
}
// 有錯誤則抛出異常
self::haveErrorThrowException();
return $info;
}
static function close() {
self::$link = null;
}
static function escape_string($str) {
return addslashes($str);
}
static function haveErrorThrowException() {
$obj = empty(self::$PDOStatement) ? self::$link : self::$PDOStatement;
$arrError = $obj->errorInfo();
if(count($arrError) > 1) { // 有錯誤資訊
//$this->rollback();
self::$error = $arrError[2]. "
[ SQL語句 ] : ".self::$queryStr;
//throw_exception($this->error);
throw_exception(self::$error);
return false;
}
//主要針對execute()方法抛出異常
if(self::$queryStr=='')throw_exception('Query was empty
[ SQL語句 ] :');
}
static function parseWhere($where) {
$whereStr = '';
if(is_string($where) || is_null($where)) {
$whereStr = $where;
}
return empty($whereStr)?'':' WHERE '.$whereStr;
}
static function parseOrder($order) {
$orderStr = '';
if(is_array($order))
$orderStr .= ' ORDER BY '.implode(',', $order);
else if(is_string($order) && !empty($order))
$orderStr .= ' ORDER BY '.$order;
return $orderStr;
}
static function parseLimit($limit) {
$limitStr = '';
if(is_array($limit)) {
if(count($limit)>1)
$limitStr .= ' LIMIT '.$limit[0].' , '.$limit[1].' ';
else
$limitStr .= ' LIMIT '.$limit[0].' ';
} else if(is_string($limit) && !empty($limit)) {
$limitStr .= ' LIMIT '.$limit.' ';
}
return $limitStr;
}
static function parseGroup($group) {
$groupStr = '';
if(is_array($group))
$groupStr .= ' GROUP BY '.implode(',', $group);
else if(is_string($group) && !empty($group))
$groupStr .= ' GROUP BY '.$group;
return empty($groupStr)?'':$groupStr;
}
static function parseHaving($having) {
$havingStr = '';
if(is_string($having) && !empty($having))
$havingStr .= ' HAVING '.$having;
return $havingStr;
}
static function parseFields($fields) {
if(is_array($fields)) {
array_walk($fields, array($this, 'addSpecialChar'));
$fieldsStr = implode(',', $fields);
}else if(is_string($fields) && !empty($fields)) {
if( false === strpos($fields,'`') ) {
$fields = explode(',',$fields);
array_walk($fields, array($this, 'addSpecialChar'));
$fieldsStr = implode(',', $fields);
}else {
$fieldsStr = $fields;
}
}else $fieldsStr = '*';
return $fieldsStr;
}
private function parseSets($sets) {
$setsStr = '';
if(is_array($sets)){
foreach ($sets as $key=>$val){
$key = self::addSpecialChar($key);
$val = self::fieldFormat($val);
$setsStr .= "$key = ".$val.",";
}
$setsStr = substr($setsStr,0,-1);
}else if(is_string($sets)) {
$setsStr = $sets;
}
return $setsStr;
}
static function fieldFormat(&$value) {
if(is_int($value)) {
$value = intval($value);
} else if(is_float($value)) {
$value = floatval($value);
} elseif(preg_match('/^\(\w*(\+|\-|\*|\/)?\w*\)$/i',$value)){
// 支援在字段的值裡面直接使用其它字段
// 例如 (score+1) (name) 必須包含括号
$value = $value;
}else if(is_string($value)) {
$value = '\''.self::escape_string($value).'\'';
}
return $value;
}
static function addSpecialChar(&$value) {
if( '*' == $value || false !== strpos($value,'(') || false !== strpos($value,'.') || false !== strpos($value,'`')) {
//如果包含* 或者 使用了sql方法 則不作處理
} elseif(false === strpos($value,'`') ) {
$value = '`'.trim($value).'`';
}
return $value;
}
static function removeEmpty($value){
return !empty($value);
}
static function query($sql='') {
// 擷取資料庫聯接
$link = self::$link;
if ( !$link ) return false;
self::$queryStr = $sql;
//釋放前次的查詢結果
if ( !empty(self::$PDOStatement) ) self::free();
self::$PDOStatement = $link->prepare(self::$queryStr);
$bol = self::$PDOStatement->execute();
// 有錯誤則抛出異常
self::haveErrorThrowException();
return $bol;
}
static function execute($sql='') {
// 擷取資料庫聯接
$link = self::$link;
if ( !$link ) return false;
self::$queryStr = $sql;
//釋放前次的查詢結果
if ( !empty(self::$PDOStatement) ) self::free();
$result = $link->exec(self::$queryStr);
// 有錯誤則抛出異常
self::haveErrorThrowException();
if ( false === $result) {
return false;
} else {
self::$numRows = $result;
self::$lastInsertId = $link->lastInsertId();
return self::$numRows;
}
}
static function isMainIps($query) {
$queryIps = 'INSERT|UPDATE|DELETE|REPLACE|CREATE|DROP|LOAD DATA|SELECT .* INTO|COPY|ALTER|GRANT|REVOKE|LOCK|UNLOCK';
if (preg_match('/^\s*"?(' . $queryIps . ')\s+/i', $query)) {
return true;
}
return false;
}
static function filterPost($table,$data) {
$table_column = self::getFields($table);
$newdata=array();
foreach ($table_column as $key=>$val){
if(array_key_exists($key,$data) && ($data[$key])!==''){
$newdata[$key] = $data[$key];
}
}
return $newdata;
}
static function startTrans() {
//資料rollback 支援
$link = self::$link;
if ( !$link ) return false;
if (self::$transTimes == 0) {
$link->beginTransaction();
}
self::$transTimes++;
return ;
}
static function commit() {
$link = self::$link;
if ( !$link ) return false;
if (self::$transTimes > 0) {
$result = $link->commit();
self::$transTimes = 0;
if(!$result){
throw_exception(self::$error());
return false;
}
}
return true;
}
public function rollback() {
$link = self::$link;
if ( !$link ) return false;
if (self::$transTimes > 0) {
$result = $link->rollback();
self::$transTimes = 0;
if(!$result){
throw_exception(self::$error());
return false;
}
}
return true;
}
}
?>