Let’s say that it’s 2019 and for some odd reason you need to setup a PHP dev env

First, let’s start a postgres service.

docker run --name my-postgres --rm -p 5432:5432 postgres:alpine

This docker container has to have a name. my-postgres in this case. It will be used

To connect a client to postgres, we can run

docker run --link my-postgres --rm -it postgres:alpine psql -U postgres -h my-postgres

--link my-postgres will make my-postgres DNS points to the IP of my-postgres container.

Then we say to psql connect to my-postgres host.

Now we can run the php container.

First, go to your working dir

cd awesome-php-project

cat index.php
<!DOCTYPE html>
<title>PHP Hello!</title>
  $conn = pg_connect("host=my-postgres port=5432 user=postgres");
  $result = pg_query($conn, "select * from pg_stat_activity");


See that we are connecting the pg_connect to mypostgres host.

docker run \
  --rm \
  --name  my-php \
  --link my-postgres:postgres \
  -p 8000:8000 \
  -v"$(pwd):/usr/src/myapp" \
  -w /usr/src/myapp \
  php:cli sh -c \
  'apt-get update && apt-get install -y libpq-dev && docker-php-ext-configure pgsql -with-pgsql=/usr/local/pgsql && docker-php-ext-install pdo pdo_pgsql pgsql && php -S'

Now you can connect to http://localhost:8000 and see your awesome app.

For PHP reaons, PHP will not stop with ctrl+c nor ctrl+d

To stop this container, we need to run docker kill my-php

Conexao Postgres utilizndo pHP

  $bdcon4 = pg_connect("host=my-postgres dbname='nome_do_banco' port=5432 user=postgres");
// $**** define uma variavel de conexao
//coneta a um banco de dados chamado "nome_do_banco" na máquina "my-postgres" com um usuário e senha
{ print "Falha deu ruim";
//avisa de a  conexao deu errado "!" é a negativa

Insere um dado em uma tabela

//inclui todos os dados de "conexao.php"

$nome = $_POST['nome'];
$email = $_POST['email'];
$profissao = $_POST['profissao'];
$sql =pg_query($bdcon4, "INSERT INTO usuarios(nome, email, profissao) VALUES('$nome','$email','$profissao')");
// insere dentro da tabela "usuarios" do banco de dados "nome_do_banco" que foi definido na conexao.php acima