将千万账号密码导入数据库脚本（增加高效版本）

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$start_time=microtime_float();
$db=mysqli_connect('localhost','root','root','test');
$file=fopen('f:/10-million-combos.txt','rb');
mysqli_query($db,"DROP TABLE IF EXISTS `ten_million_account`;");
mysqli_query($db,"CREATE TABLE `test`.`ten_million_account`( `account_id` MEDIUMINT UNSIGNED NOT NULL AUTO_INCREMENT, `account` VARCHAR(100) NOT NULL, `password` VARCHAR(200) NOT NULL, PRIMARY KEY (`account_id`) ) ENGINE=MYISAM CHARSET=utf8 COLLATE=utf8_general_ci; ");
//mysqli_query($db,"TRUNCATE ten_million_account;");
$sql = "INSERT INTO ten_million_account(`account`,`password`) VALUES('%s','%s');";
$count=1;
while($row=fgets($file)){
    echo $row;
    $data=preg_split("@\s.*?@",$row);
    if($data && !empty($data[0]) && !empty($data[1])){
        mysqli_query($db,sprintf($sql,$data[0],$data[1]));
    }
    $count++;
    unset($row);
    unset($data);
}
echo "\n run time:".(microtime_float()-$start_time);


function  microtime_float ()
{
    list( $usec ,  $sec ) =  explode ( " " ,  microtime ());
    return ((float) $usec  + (float) $sec );
}

2. [代码]改进高效版    

$start_time=microtime_float();
$db=mysqli_connect('localhost','root','root','test');
$file=fopen('f:/10-million-combos.txt','rb');
mysqli_query($db,"DROP TABLE IF EXISTS `ten_million_account`;");
mysqli_query($db,"CREATE TABLE `test`.`ten_million_account`( `account_id` MEDIUMINT UNSIGNED NOT NULL AUTO_INCREMENT, `account` VARCHAR(100) NOT NULL, `password` VARCHAR(200) NOT NULL, PRIMARY KEY (`account_id`) ) ENGINE=MYISAM CHARSET=utf8 COLLATE=utf8_general_ci; ");
//mysqli_query($db,"TRUNCATE ten_million_account;");
$sql = "INSERT INTO `test`.ten_million_account(`account`,`password`) VALUES %s;";
$count=1;
$conj=$values_str='';
while($row=fgets($file)){
    //echo $row;
    $data=preg_split("@\s.*?@",addslashes($row));
    if($data && !empty($data[0]) && !empty($data[1])){
        //mysqli_query($db,sprintf($sql,$data[0],$data[1]));
        $values_str.=$conj."('".$data[0]."','".$data[1]."')";
        $conj=',';
    }
    unset($row);
    unset($data);
    if(($count%10000)==0){
        if($values_str){
            echo $count."\n";
            if(!mysqli_query($db,sprintf($sql,$values_str))){
                echo sprintf($sql,$values_str)."\n";
                exit;
            }
        }else{
            exit;
        }
        $values_str=$conj='';
    }
    $count++;
}
if($values_str){
    mysqli_query($db,sprintf($sql,$values_str));
}
echo "\n run time:".(microtime_float()-$start_time);


function  microtime_float ()
{
    list( $usec ,  $sec ) =  explode ( " " ,  microtime ());
    return ((float) $usec  + (float) $sec );
}