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function explorerdir($sDir){

static $aTempArr=array();
$dp=opendir($sDir);
while ($sFileName = readdir($dp)){

if ($sFileName !='.' && $sFileName !='..'){

$sPath=$sDir."/" . $sFileName;
if ( is_dir($sPath)){

explorerdir($sPath);
} else {

// $filetime=date("Y-m-d H:i:s",filectime("$path"));
// $fp=$path.",".$filetime;
$fp=$sPath;
$aTempArr[]=$fp;
}
}
}
closedir($dp);
return $aTempArr;
}
$aFiles = explorerdir("D:/wamp/www/dedecms/templets/default");
foreach($aFiles as $iKey => $sFiles) {

$sContent = file_get_contents($sFiles);
$sContent = str_ireplace('<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />', '<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />', $sContent);
$sContent = iconv("UTF-8", "gb2312", $sContent);
unlink($sFiles);
file_put_contents($sFiles, $sContent);
unset($sContent);
}

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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
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