adodb-mysql.inc.php

PHP 建站工具,CMS系统,类似与oscommerce

<?php
/*
V4.04 13 Nov 2003  (c) 2000-2003 John Lim ([e-mail]). All rights reserved.
  Released under both BSD license and Lesser GPL library license. 
  Whenever there is any discrepancy between the two licenses, 
  the BSD license will take precedence.
  Set tabs to 8.
  
  MySQL code that does not support transactions. Use mysqlt if you need transactions.
  Requires mysql client. Works on Windows and Unix.
  
 28 Feb 2001: MetaColumns bug fix - suggested by  Freek Dijkstra ([e-mail])
*/ 

if (! defined("_ADODB_MYSQL_LAYER")) {
 define("_ADODB_MYSQL_LAYER", 1 );

class ADODB_mysql extends ADOConnection {
	var $databaseType = 'mysql';
	var $dataProvider = 'mysql';
	var $hasInsertID = true;
	var $hasAffectedRows = true;	
	var $metaTablesSQL = "SHOW TABLES";	
	var $metaColumnsSQL = "SHOW COLUMNS FROM %s";
	var $fmtTimeStamp = "'Y-m-d H:i:s'";
	var $hasLimit = true;
	var $hasMoveFirst = true;
	var $hasGenID = true;
	var $upperCase = 'upper';
	var $isoDates = true; // accepts dates in ISO format
	var $sysDate = 'CURDATE()';
	var $sysTimeStamp = 'NOW()';
	var $hasTransactions = false;
	var $forceNewConnect = false;
	var $poorAffectedRows = true;
	var $clientFlags = 0;
	var $dbxDriver = 1;
	var $substr = "substring";
	var $lastInsID = false;
	
	function ADODB_mysql() 
	{			
	}
	
	function ServerInfo()
	{
		$arr['description'] = $this->GetOne("select version()");
		$arr['version'] = ADOConnection::_findvers($arr['description']);
		return $arr;
	}
	
	function IfNull( $field, $ifNull ) 
	{
		return " IFNULL($field, $ifNull) "; // if MySQL
	}
	
	function &MetaTables($ttype=false,$showSchema=false,$mask=false) 
	{	
		if ($mask) {
			$save = $this->metaTablesSQL;
			$mask = $this->qstr($mask);
			$this->metaTablesSQL .= " like $mask";
		}
		$ret =& ADOConnection::MetaTables($ttype,$showSchema);
		
		if ($mask) {
			$this->metaTablesSQL = $save;
		}
		return $ret;
	}
	
	// if magic quotes disabled, use mysql_real_escape_string()
	function qstr($s,$magic_quotes=false)
	{
		if (!$magic_quotes) {
		
			if (ADODB_PHPVER >= 0x4300) {
				if (is_resource($this->_connectionID))
					return "'".mysql_real_escape_string($s,$this->_connectionID)."'";
			}
			if ($this->replaceQuote[0] == '\\'){
				$s = adodb_str_replace(array('\\',"\0"),array('\\\\',"\\\0"),$s);
			}
			return  "'".str_replace("'",$this->replaceQuote,$s)."'"; 
		}
		
		// undo magic quotes for "
		$s = str_replace('\\"','"',$s);
		return "'$s'";
	}
	
	function _insertid()
	{
		return mysql_insert_id($this->_connectionID);
	}
	
	function GetOne($sql,$inputarr=false)
	{
		$rs =& $this->SelectLimit($sql,1,-1,$inputarr);
		if ($rs) {
			$rs->Close();
			if ($rs->EOF) return false;
			return reset($rs->fields);
		}
		
		return false;
	}
	
	function _affectedrows()
	{
			return mysql_affected_rows($this->_connectionID);
	}
  
 	// See http://www.mysql.com/doc/M/i/Miscellaneous_functions.html
	// Reference on Last_Insert_ID on the recommended way to simulate sequences
 	var $_genIDSQL = "update %s set id=LAST_INSERT_ID(id+1);";
	var $_genSeqSQL = "create table %s (id int not null)";
	var $_genSeq2SQL = "insert into %s values (%s)";
	var $_dropSeqSQL = "drop table %s";
	
	function CreateSequence($seqname='adodbseq',$startID=1)
	{
		if (empty($this->_genSeqSQL)) return false;
		$u = strtoupper($seqname);
		
		$ok = $this->Execute(sprintf($this->_genSeqSQL,$seqname));
		if (!$ok) return false;
		return $this->Execute(sprintf($this->_genSeq2SQL,$seqname,$startID-1));
	}
	
	function GenID($seqname='adodbseq',$startID=1)
	{
		// post-nuke sets hasGenID to false
		if (!$this->hasGenID) return false;
		
		$getnext = sprintf($this->_genIDSQL,$seqname);
		$rs = @$this->Execute($getnext);
		if (!$rs) {
			$u = strtoupper($seqname);
			$this->Execute(sprintf($this->_genSeqSQL,$seqname));
			$this->Execute(sprintf($this->_genSeq2SQL,$seqname,$startID-1));
			$rs = $this->Execute($getnext);
		}
		$this->genID = mysql_insert_id($this->_connectionID);
		
		if ($rs) $rs->Close();
		
		return $this->genID;
	}
	
  	function &MetaDatabases()
	{
		$qid = mysql_list_dbs($this->_connectionID);
		$arr = array();
		$i = 0;
		$max = mysql_num_rows($qid);
		while ($i < $max) {
			$db = mysql_tablename($qid,$i);
			if ($db != 'mysql') $arr[] = $db;
			$i += 1;
		}
		return $arr;
	}
	
		
	// Format date column in sql string given an input format that understands Y M D
	function SQLDate($fmt, $col=false)
	{	
		if (!$col) $col = $this->sysTimeStamp;
		$s = 'DATE_FORMAT('.$col.",'";
		$concat = false;
		$len = strlen($fmt);
		for ($i=0; $i < $len; $i++) {
			$ch = $fmt[$i];
			switch($ch) {
			case 'Y':
			case 'y':
				$s .= '%Y';
				break;
			case 'Q':
			case 'q':
				$s .= "'),Quarter($col)";
				
				if ($len > $i+1) $s .= ",DATE_FORMAT($col,'";
				else $s .= ",('";
				$concat = true;
				break;
			case 'M':
				$s .= '%b';
				break;
				
			case 'm':
				$s .= '%m';
				break;
			case 'D':
			case 'd':
				$s .= '%d';
				break;
			
			case 'H': 
				$s .= '%H';
				break;
				
			case 'h':
				$s .= '%I';
				break;
				
			case 'i':
				$s .= '%i';
				break;
				
			case 's':
				$s .= '%s';
				break;
				
			case 'a':
			case 'A':
				$s .= '%p';
				break;
				
			default:
				
				if ($ch == '\\') {
					$i++;
					$ch = substr($fmt,$i,1);
				}
				$s .= $ch;
				break;
			}
		}
		$s.="')";
		if ($concat) $s = "CONCAT($s)";
		return $s;
	}
	

	// returns concatenated string
	// much easier to run "mysqld --ansi" or "mysqld --sql-mode=PIPES_AS_CONCAT" and use || operator
	function Concat()
	{
		$s = "";
		$arr = func_get_args();
		$first = true;
		
		// suggestion by [e-mail]
		$s = implode(',',$arr); 
		if (strlen($s) > 0) return "CONCAT($s)";
		else return '';
	}
	
	function OffsetDate($dayFraction,$date=false)
	{		
		if (!$date) $date = $this->sysDate;
		return "from_unixtime(unix_timestamp($date)+($dayFraction)*24*3600)";
	}
	
	// returns true or false
	function _connect($argHostname, $argUsername, $argPassword, $argDatabasename)
	{
		if (ADODB_PHPVER >= 0x4300)
			$this->_connectionID = mysql_connect($argHostname,$argUsername,$argPassword,
												$this->forceNewConnect,$this->clientFlags);
		else if (ADODB_PHPVER >= 0x4200)
			$this->_connectionID = mysql_connect($argHostname,$argUsername,$argPassword,
												$this->forceNewConnect);
		else
			$this->_connectionID = mysql_connect($argHostname,$argUsername,$argPassword);
	
		if ($this->_connectionID === false) return false;
		if ($argDatabasename) return $this->SelectDB($argDatabasename);
		return true;	
	}
	
	// returns true or false
	function _pconnect($argHostname, $argUsername, $argPassword, $argDatabasename)
	{
		if (ADODB_PHPVER >= 0x4300)
			$this->_connectionID = mysql_pconnect($argHostname,$argUsername,$argPassword,$this->clientFlags);
		else
			$this->_connectionID = mysql_pconnect($argHostname,$argUsername,$argPassword);
		if ($this->_connectionID === false) return false;
		if ($this->autoRollback) $this->RollbackTrans();
		if ($argDatabasename) return $this->SelectDB($argDatabasename);
		return true;	
	}
	
	function _nconnect($argHostname, $argUsername, $argPassword, $argDatabasename)
	{
		$this->forceNewConnect = true;
		return $this->_connect($argHostname, $argUsername, $argPassword, $argDatabasename);
	}
	
 	function &MetaColumns($table) 
	{
	
		if ($this->metaColumnsSQL) {
		global $ADODB_FETCH_MODE;
		
			$save = $ADODB_FETCH_MODE;
			$ADODB_FETCH_MODE = ADODB_FETCH_NUM;
			if ($this->fetchMode !== false) $savem = $this->SetFetchMode(false);
			
			$rs = $this->Execute(sprintf($this->metaColumnsSQL,$table));
			
			if (isset($savem)) $this->SetFetchMode($savem);
			$ADODB_FETCH_MODE = $save;