adodb-mysqli.inc.php

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<?php
/*
V4.54 5 Nov 2004  (c) 2000-2004 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.
 
21 October 2003: MySQLi extension implementation by Arjen de Rijke ([e-mail])
Based on adodb 3.40
*/ 

// security - hide paths
//if (!defined('ADODB_DIR')) die();

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

 // disable adodb extension - currently incompatible.
 global $ADODB_EXTENSION; $ADODB_EXTENSION = false;

class ADODB_mysqli extends ADOConnection {
	var $databaseType = 'mysqli';
	var $dataProvider = 'native';
	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 $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 $substr = "substring";
	var $port = false;
	var $socket = false;
	var $_bindInputArray = false;
	var $nameQuote = '`';		/// string to use to quote identifiers and names
	
	function ADODB_mysqli() 
	{			
	  if(!extension_loaded("mysqli"))
	      trigger_error("You must have the mysqli extension installed.", E_USER_ERROR);
	    
	}
	

	// returns true or false
	// To add: parameter int $port,
	//         parameter string $socket
	function _connect($argHostname = NULL, 
			  $argUsername = NULL, 
			  $argPassword = NULL, 
			  $argDatabasename = NULL, $persist=false)
	  {
	    $this->_connectionID = @mysqli_init();
	    
	    if (is_null($this->_connectionID)) {
	      // mysqli_init only fails if insufficient memory
	      if ($this->debug) 
				ADOConnection::outp("mysqli_init() failed : "  . $this->ErrorMsg());
	      return false;
	    }
	    // Set connection options
	    // Not implemented now
	    // mysqli_options($this->_connection,,);
 	    if (mysqli_real_connect($this->_connectionID,
 				    $argHostname,
 				    $argUsername,
 				    $argPassword,
 				    $argDatabasename,
					$this->port,
					$this->socket,
					$this->clientFlags))
 	      {
 		if ($argDatabasename)  return $this->SelectDB($argDatabasename);
		  
		
 		return true;
 	   }
 	    else {
			if ($this->debug) 
		  		ADOConnection::outp("Could't connect : "  . $this->ErrorMsg());
			return false;
	      }
	  }
	
	// returns true or false
	// How to force a persistent connection
	function _pconnect($argHostname, $argUsername, $argPassword, $argDatabasename)
	{
		return $this->_connect($argHostname, $argUsername, $argPassword, $argDatabasename, true);

	}
	
	// When is this used? Close old connection first?
	// In _connect(), check $this->forceNewConnect? 
	function _nconnect($argHostname, $argUsername, $argPassword, $argDatabasename)
	  {
	    $this->forceNewConnect = true;
	    $this->_connect($argHostname, $argUsername, $argPassword, $argDatabasename);
	  }
	
	function IfNull( $field, $ifNull ) 
	{
		return " IFNULL($field, $ifNull) "; // if MySQL
	}
	
	function ServerInfo()
	{
		$arr['description'] = $this->GetOne("select version()");
		$arr['version'] = ADOConnection::_findvers($arr['description']);
		return $arr;
	}
	
	
	function BeginTrans()
	{	  
		if ($this->transOff) return true;
		$this->transCnt += 1;
		$this->Execute('SET AUTOCOMMIT=0');
		$this->Execute('BEGIN');
		return true;
	}
	
	function CommitTrans($ok=true) 
	{
		if ($this->transOff) return true; 
		if (!$ok) return $this->RollbackTrans();
		
		if ($this->transCnt) $this->transCnt -= 1;
		$this->Execute('COMMIT');
		$this->Execute('SET AUTOCOMMIT=1');
		return true;
	}
	
	function RollbackTrans()
	{
		if ($this->transOff) return true;
		if ($this->transCnt) $this->transCnt -= 1;
		$this->Execute('ROLLBACK');
		$this->Execute('SET AUTOCOMMIT=1');
		return true;
	}
	
	// if magic quotes disabled, use mysql_real_escape_string()
	// From readme.htm:
	// Quotes a string to be sent to the database. The $magic_quotes_enabled
	// parameter may look funny, but the idea is if you are quoting a 
	// string extracted from a POST/GET variable, then 
	// pass get_magic_quotes_gpc() as the second parameter. This will 
	// ensure that the variable is not quoted twice, once by qstr and once 
	// by the magic_quotes_gpc.
	//
	//Eg. $s = $db->qstr(HTTP_GET_VARS['name'],get_magic_quotes_gpc());
	function qstr($s, $magic_quotes = false)
	{
		if (!$magic_quotes) {
	    	if (PHP_VERSION >= 5)
	      		return "'" . mysqli_real_escape_string($this->_connectionID, $s) . "'";   
	    
		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()
	{
	  $result = @mysqli_insert_id($this->_connectionID);
	  if ($result == -1){
	      if ($this->debug) ADOConnection::outp("mysqli_insert_id() failed : "  . $this->ErrorMsg());
	  }
	  return $result;
	}
	
	// Only works for INSERT, UPDATE and DELETE query's
	function _affectedrows()
	{
	  $result =  @mysqli_affected_rows($this->_connectionID);
	  if ($result == -1) {
	      if ($this->debug) ADOConnection::outp("mysqli_affected_rows() failed : "  . $this->ErrorMsg());
	  }
	  return $result;
	}
  
 	// 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);
		$holdtransOK = $this->_transOK; // save the current status
		$rs = @$this->Execute($getnext);
		if (!$rs) {
			if ($holdtransOK) $this->_transOK = true; //if the status was ok before reset
			$u = strtoupper($seqname);
			$this->Execute(sprintf($this->_genSeqSQL,$seqname));
			$this->Execute(sprintf($this->_genSeq2SQL,$seqname,$startID-1));
			$rs = $this->Execute($getnext);
		}
		$this->genID = mysqli_insert_id($this->_connectionID);
		
		if ($rs) $rs->Close();
		
		return $this->genID;
	}
	
  	function &MetaDatabases()
	{
		$query = "SHOW DATABASES";
		$ret =& $this->Execute($query);
		return $ret;
	}

	  
	function &MetaIndexes ($table, $primary = FALSE)
	{
		// save old fetch mode
		global $ADODB_FETCH_MODE;
		
		$save = $ADODB_FETCH_MODE;
		$ADODB_FETCH_MODE = ADODB_FETCH_NUM;
		if ($this->fetchMode !== FALSE) {
		       $savem = $this->SetFetchMode(FALSE);
		}
		
		// get index details
		$rs = $this->Execute(sprintf('SHOW INDEXES FROM %s',$table));
		
		// restore fetchmode
		if (isset($savem)) {
		        $this->SetFetchMode($savem);
		}
		$ADODB_FETCH_MODE = $save;
		
		if (!is_object($rs)) {
		        return FALSE;
		}
		
		$indexes = array ();
		
		// parse index data into array
		while ($row = $rs->FetchRow()) {
		        if ($primary == FALSE AND $row[2] == 'PRIMARY') {
		                continue;
		        }
		        
		        if (!isset($indexes[$row[2]])) {
		                $indexes[$row[2]] = array(
		                        'unique' => ($row[1] == 0),
		                        'columns' => array()
		                );
		        }
		        
		        $indexes[$row[2]]['columns'][$row[3] - 1] = $row[4];
		}
		
		// sort columns by order in the index
		foreach ( array_keys ($indexes) as $index )
		{
		        ksort ($indexes[$index]['columns']);
		}
		
		return $indexes;
	}

	
	// 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();
		
		// suggestion by [e-mail]
		$s = implode(',',$arr); 
		if (strlen($s) > 0) return "CONCAT($s)";
		else return '';
	}
	
	// dayFraction is a day in floating point
	function OffsetDate($dayFraction,$date=false)
	{		
		if (!$date) 
		  $date = $this->sysDate;
		return "from_unixtime(unix_timestamp($date)+($dayFraction)*24*3600)";
	}
	
	
 	function &MetaColumns($table) 
	{
		if (!$this->metaColumnsSQL)
			return false;
		
		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 = $save;
		if (!is_object($rs))
			return false;
		
		$retarr = array();
		while (!$rs->EOF) {
			$fld = new ADOFieldObject();
			$fld->name = $rs->fields[0];