php导入大的mysql sql文件

*/
class DBManager
{
var $dbHost = '';
var $dbUser = '';
var $dbPassword = '';
var $dbSchema = '';

function __construct($host,$user,$password,$schema)
{
$this->dbHost = $host;
$this->dbUser = $user;
$this->dbPassword = $password;
$this->dbSchema = $schema;
}

function createFromFile($sqlPath,$delimiter = '(;\n)|((;\r\n))|(;\r)',$prefix = '',$commenter = array('#','--'))
{
//判断文件是否存在
if(!file_exists($sqlPath))
return false;

$handle = fopen($sqlPath,'rb');

$sqlStr = fread($handle,filesize($sqlPath));

//通过sql语法的语句分割符进行分割
$segment = explode(";",trim($sqlStr));

//var_dump($segment);

//去掉注释和多余的空行
foreach($segment as & $statement)
{
$sentence = explode("\n",$statement);

$newStatement = array();

foreach($sentence as $subSentence)
{
if('' != trim($subSentence))
{
//判断是会否是注释
$isComment = false;
foreach($commenter as $comer)
{
if(eregi("^(".$comer.")",trim($subSentence)))
{
$isComment = true;
break;
}
}
//如果不是注释，则认为是sql语句
if(!$isComment)
$newStatement[] = $subSentence;
}
}

$statement = $newStatement;
}
//对表名加前缀
if('' != $prefix)
{

//只有表名在第一行出现时才有效 例如 CREATE TABLE talbeName

$regxTable = "^[\`\'\"]{0,1}[\_a-zA-Z]+[\_a-zA-Z0-9]*[\`\'\"]{0,1}$";//处理表名的正则表达式
$regxLeftWall = "^[\`\'\"]{1}";

$sqlFlagTree = array(
"CREATE" => array(
"TABLE" => array(
"$regxTable" => 0
)
),
"INSERT" => array(
"INTO" => array(
"$regxTable" => 0
)
)

);

foreach($segment as & $statement)
{
$tokens = split(" ",$statement[0]);

$tableName = array();
$this->findTableName($sqlFlagTree,$tokens,0,$tableName);

if(empty($tableName['leftWall']))
{
$newTableName = $prefix.$tableName['name'];
}
else{
$newTableName = $tableName['leftWall'].$prefix.substr($tableName['name'],1);
}

$statement[0] = str_replace($tableName['name'],$newTableName,$statement[0]);
}

}
//组合sql语句
foreach($segment as & $statement)
{
$newStmt = '';
foreach($statement as $sentence)
{
$newStmt = $newStmt.trim($sentence)."\n";
}

$statement = $newStmt;
}

//用于测试------------------------
//var_dump($segment);
//writeArrayToFile('data.txt',$segment);
//-------------------------------

self::saveByQuery($segment);

return true;
}

private function saveByQuery($sqlArray)
{
$conn = mysql_connect($this->dbHost,$this->dbUser,$this->dbPassword);

mysql_select_db($this->dbSchema);

foreach($sqlArray as $sql)
{
mysql_query($sql);
}
mysql_close($conn);
}

private function findTableName($sqlFlagTree,$tokens,$tokensKey=0,& $tableName = array())
{
$regxLeftWall = "^[\`\'\"]{1}";

if(count($tokens)<=$tokensKey) return false; if('' == trim($tokens[$tokensKey])) { return self::findTableName($sqlFlagTree,$tokens,$tokensKey+1,$tableName); } else { foreach($sqlFlagTree as $flag => $v)
{
if(eregi($flag,$tokens[$tokensKey]))
{
if(0==$v)
{
$tableName['name'] = $tokens[$tokensKey];

if(eregi($regxLeftWall,$tableName['name']))
{
$tableName['leftWall'] = $tableName['name']{0};
}

return true;
}
else{
return self::findTableName($v,$tokens,$tokensKey+1,$tableName);
}
}
}
}

return false;
}
}

function writeArrayToFile($fileName,$dataArray,$delimiter="\r\n")
{
$handle=fopen($fileName, "wb");

$text = '';

foreach($dataArray as $data)
{
$text = $text.$data.$delimiter;
}
fwrite($handle,$text);
}

//测试
$dbM = new DBManager('localhost','root','root3306','empirecms');
$dbM->createFromFile('empirecms.sql',null,'');
?>