PHP操作MySQL数据库的类

PHP #mysql #数据库封装 #类2012-05-11 21:57
这个类很好用的说。以后常来一个网yige.org
class dbstuff {
	var $querynum = 0;
	var $link;
	var $charset;
	function connect($dbhost, $dbuser, $dbpw, $dbname = '', $pconnect = 0, $halt = TRUE) {
		if($pconnect) {
			if(!$this->link = @mysql_pconnect($dbhost, $dbuser, $dbpw)) {
				$halt && $this->halt('Can not connect to MySQL server');
			}
		} else {
			if(!$this->link = @mysql_connect($dbhost, $dbuser, $dbpw, 1)) {
				$halt && $this->halt('Can not connect to MySQL server');
			}
		}

		if($this->version() > '4.1') {
			if($this->charset) {
				@mysql_query("SET character_set_connection=$this->charset, character_set_results=$this->charset, character_set_client=binary", $this->link);
			}
			if($this->version() > '5.0.1') {
				@mysql_query("SET sql_mode=''", $this->link);
			}
		}
		if($dbname) {
			@mysql_select_db($dbname, $this->link);
		}
		
		mysql_query("SET NAMES utf8");
	}

	function select_db($dbname) {
		return mysql_select_db($dbname, $this->link);
	}

	function fetch_array($query, $result_type = MYSQL_ASSOC) {
		return mysql_fetch_array($query, $result_type);
	}

	function query($sql, $type = '') {
		if(YIGEBUG) {
			global $yigecms;
			$sqlstarttime = $sqlendttime = 0;
			$mtime = explode(' ', microtime());
			$sqlstarttime = number_format(($mtime[1] + $mtime[0] - time()), 6) * 1000;
		}
		$func = $type == 'UNBUFFERED' && @function_exists('mysql_unbuffered_query') ?
			'mysql_unbuffered_query' : 'mysql_query';
		if(!($query = $func($sql, $this->link)) && $type != 'SILENT') {
			$this->halt('MySQL Query Error', $sql);
		}
		if(YIGEBUG) {
			$mtime = explode(' ', microtime());
			$sqlendttime = number_format(($mtime[1] + $mtime[0] - time()), 6) * 1000;
			$sqltime = round(($sqlendttime - $sqlstarttime), 3);

			$explain = array();
			$info = mysql_info();
			if($query && preg_match("/^(select )/i", $sql)) {
				$explain = mysql_fetch_assoc(mysql_query('EXPLAIN '.$sql, $this->link));
			}
			$yigecms['debug_query'][] = array('sql'=>$sql, 'time'=>$sqltime, 'info'=>$info, 'explain'=>$explain);
		}
		$this->querynum++;
		return $query;
	}

	function affected_rows() {
		return mysql_affected_rows($this->link);
	}

	function error() {
		return (($this->link) ? mysql_error($this->link) : mysql_error());
	}

	function errno() {
		return intval(($this->link) ? mysql_errno($this->link) : mysql_errno());
	}

	function result($query, $row) {
		$query = @mysql_result($query, $row);
		return $query;
	}

	function num_rows($query) {
		$query = mysql_num_rows($query);
		return $query;
	}

	function num_fields($query) {
		return mysql_num_fields($query);
	}

	function free_result($query) {
		return mysql_free_result($query);
	}

	function insert_id() {
		return ($id = mysql_insert_id($this->link)) >= 0 ? $id : $this->result($this->query("SELECT last_insert_id()"), 0);
	}

	function fetch_row($query) {
		$query = mysql_fetch_row($query);
		return $query;
	}

	function fetch_fields($query) {
		return mysql_fetch_field($query);
	}

	function version() {
		return mysql_get_server_info($this->link);
	}

	function close() {
		return mysql_close($this->link);
	}

	function halt($message = '', $sql = '') {
		echo "
				MySQL Error

				Message: $message

				SQL: $sql

				Error: ".$this->error()."

				Errno.: ".$this->errno()."";
		exit();
	}
}
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PHP操作MySQL数据库的类

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