FROM php:7.0-cli
MAINTAINER Terry Zhang <zterry@qq.com>
RUN docker-php-ext-install pdo_mysql mysqli

docker build -t php-mysql

<?php
$host = 'mysql';
$user = 'root';
$pwd = 'password';
$db = 'test';
$mysqli = new mysqli($host, $user, $pwd, $db);
if ($mysqli->connect_errno) {
echo "Errno: " . $mysqli->connect_errno . "n";
}
$sql = 'SELECT * FROM users';
if ($res = $mysqli->query($sql)) {
while ($row = $res->fetch_assoc()) {
print_r($row);
}
}
?>

bash docker run -it --rm -v (pwd):/var --link my-mysql-server1:mysql php-mysql:latest php /var/mysql.php

docker run -it --rm php-mysql ping mysql