How import big CSV file into MySQL - php

Question

My web application receives comma separated list of phones, which must be imported into the Contacts table. The list can contain from 100,000 to 1,000,000 items. I implemented the stored procedure. But it works still too slow for me. Can you please help me to improve it?
DELIMITER $$
CREATE DEFINER=`root`#`localhost` PROCEDURE `import_phones`
(IN ContactGroupId int, IN strPhones mediumtext, OUT total int, OUT inserted int)
main: BEGIN
declare delim varchar(1) default(',');
declare delimPtr int unsigned default(0); -- pointer to current spliter position
declare startPtr int unsigned default(1);
declare phone1 nvarchar(20);
set total = 0; -- counter of total rows
set inserted = 0; -- counter of inserted rows
if strPhones is null or length(strPhones) < 1 then
leave main;
end if;
drop table if exists insertphones;
create temporary table insertphones(phone nvarchar(20))
engine = memory;
/***
-- split strPhones by delimiter
*/
SET delimPtr = locate(delim, strPhones,startPtr);
loop_label: while(delimPtr > 0) do
insert into insertphones (phone) values (substring(strPhones,startPtr,delimPtr-startPtr));
-- select delimPtr,startPtr, substring(strPhones,startPtr,delimPtr-startPtr);
set startPtr = delimPtr+1;
set delimPtr = locate(delim, strPhones,startPtr);
end while;
if delimPtr = 0 then
insert into insertphones (phone) values (substring(strPhones,startPtr,delimPtr-startPtr));
end if;
-- select delimPtr,startPtr;
select count(*) from insertphones into total;
/***
-- insert phones
*/
insert into contacts (Phone, ContactGroupId)
select distinct(phone), ContactGroupId from insertphones where
phone not in (select Phone from contacts where ContactGroupId = ContactGroupId);
SELECT ROW_COUNT() into inserted ;
-- select total, inserted;
END

Answer 1

Ponder load data infile, like
load data infile 'filename' into tablename lines terminated by ','

Answer 2

Ok. The solution which works much much (about 10x-20x times) faster then the initial version.
$tempFile = tempnam(sys_get_temp_dir(), 'phones');
$tempTable = 'tmp'.$contactGroupId.time();
file_put_contents($tempFile, $phones);
try {
chmod($tempFile, 0777); //required for MySQL import
$sql = sprintf(
"set #total = 0;
set #inserted = 0;
drop table if exists %s;
create temporary table %s(phone nvarchar(20)) engine = memory;
LOAD DATA INFILE '%s' INTO TABLE %s FIELDS TERMINATED BY '' LINES TERMINATED BY ',';
SELECT count(*) FROM %s INTO #total;
DELETE FROM %s WHERE length(phone) < 10;
UPDATE %s SET phone = CONCAT('7',phone) WHERE length(phone) = 10;
UPDATE %s SET phone = INSERT(phone,1,1,'7') WHERE phone like '8%%' and length(phone) = 11;
insert into contacts (Phone, ContactGroupId) select distinct(phone), %d from %s where phone not in (select Phone from contacts where ContactGroupId = %d);
SELECT ROW_COUNT() into #inserted;"
, $tempTable, $tempTable, str_replace('\\','\\\\',$tempFile), $tempTable, $tempTable, $tempTable, $tempTable, $tempTable, $contactGroupId, $tempTable, $contactGroupId );
$command = Yii::app()->db->createCommand($sql);
$command->execute();
$command = false;
$result = Yii::app()->db->createCommand("select #total as total, #inserted as inserted")->queryRow();
$contactCounter['all'] += $result['total'];
$contactCounter['created'] += $result['inserted'];