<?php
// Connect to a database named "mary"
$dbconn = pg_connect("dbname=mary");

// Prepare a query for execution
$result = pg_prepare($dbconn, "my_query", 'SELECT * FROM shops WHERE name = $1');

// Execute the prepared query.  Note that it is not necessary to escape
// the string "Joe's Widgets" in any way
$result = pg_execute($dbconn, "my_query", array("Joe's Widgets"));

// Execute the same prepared query, this time with a different parameter
$result = pg_execute($dbconn, "my_query", array("Clothes Clothes Clothes"));
?>

<?php
$pdo = new PDO('pgsql:dbname=example;user=me;password=pass;host=localhost;port=5432');

$sql = "SELECT username, password
FROM users
WHERE username = :username
AND password = :pass";

$sth = $pdo->prepare($sql);
$sth->execute(array(':username' => $_POST['username'], ':pass' => $_POST['password']));
$result = $sth->fetchAll();

<?php
$pdo = new PDO('pgsql:dbname=example;user=me;password=pass;host=localhost;port=5432');

$sql = "SELECT username, password
FROM users
WHERE username = ?
AND password = ?";

$sth = $pdo->prepare($sql);
$sth->execute(array($_POST['username'], $_POST['password']));
$result = $sth->fetchAll();

$result = pg_prepare($dbconn, "my_query", 'SELECT * FROM shops WHERE name = $1');
$result = pg_execute($dbconn, "my_query", array("Joe's Widgets"));
$result = pg_execute($dbconn, "my_query", array("row two"));
$result = pg_execute($dbconn, "my_query", array("row three"));

$result = pg_prepare($dbconn, "query1", 'SELECT passhash_md5 FROM users WHERE email = $1');

$result = pg_prepare($dbconn, "query1", 'SELECT passhash_md5 FROM users WHERE email = ?');