<?php
// массив записей для добавления в БД:
// $array_insert = array("('1','Anna','anna@mail.ru')",
// "('2','Oleg','oleg@yandex.ru')", ... );
$query = mysql_query("INSERT INTO `t1` (`id`, `name`, `email`)
                      VALUES ".implode(",", $array_insert), $db);
?>

MariaDB [(none)]> create database test_1;
Query OK, 1 row affected (0.00 sec)

MariaDB [(none)]> use test_1
Database changed
MariaDB [test_1]> create table t1 (a INT NOT NULL AUTO_INCREMENT,
    -> name varchar(100), email varchar(100), PRIMARY KEY (a)
    -> );
Query OK, 0 rows affected (0.05 sec)

MariaDB [test_1]> drop table t1;
Query OK, 0 rows affected (0.03 sec)

MariaDB [test_1]> create table t1 (id INT NOT NULL AUTO_INCREMENT, name varchar(100), email varchar(100), PRIMARY KEY (id) );
Query OK, 0 rows affected (0.03 sec)

MariaDB [test_1]> insert into t1 (name, email) values ('user1', 'user1@gmail.com'), ('user2', 'user2@gmail.com');
Query OK, 2 rows affected (0.02 sec)
Records: 2  Duplicates: 0  Warnings: 0

MariaDB [test_1]> select * from t1;
+----+-------+-----------------+
| id | name  | email           |
+----+-------+-----------------+
|  1 | user1 | user1@gmail.com |
|  2 | user2 | user2@gmail.com |
+----+-------+-----------------+
2 rows in set (0.01 sec)

MariaDB [test_1]> INSERT INTO t1 (id, name, email) VALUES (1, 'user1', 'new_email_user1@gmail.com'), (2, 'new_name', 'user2@gmail.com') ON DUPLICATE KEY UPDATE name = VALUES(`name`), email = VALUES(`email`);
Query OK, 4 rows affected (0.01 sec)
Records: 2  Duplicates: 2  Warnings: 0

MariaDB [test_1]> select * from t1;
+----+----------+---------------------------+
| id | name     | email                     |
+----+----------+---------------------------+
|  1 | user1    | new_email_user1@gmail.com |
|  2 | new_name | user2@gmail.com           |
+----+----------+---------------------------+
2 rows in set (0.00 sec)