一直想爲 pg 做點貢獻，今天終於有空了， 於是寫一個PostgreSQL 9.13 入門的教程 ...
部署上可以移步這裏 ...
php 5.4.10 + nginx1.0.12 + PostgreSQL 9.1.3 源碼編譯自動化部署第二版
http://blog.csdn.net/qzier_go/article/details/7316510
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| System | CentOS 5.7
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| DB | PostgreSQL 9.13
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lnpp腳本里面已經做了些初始化的工作，例如：
su postgres -c "$PG_ROOT/bin/initdb -D $PG_ROOT/data && exit" 我們先輸入一些數據以供後面查詢(詳見後面補充）
-- Database: bpsimple
-- DROP DATABASE bpsimple;
CREATE DATABASE bpsimple
WITH OWNER = postgres
ENCODING = 'UTF8'
TABLESPACE = pg_default
LC_COLLATE = 'en_US.UTF-8'
LC_CTYPE = 'en_US.UTF-8'
CONNECTION LIMIT = -1;
-- Table: item
-- DROP TABLE item;
CREATE TABLE item
(
item_id serial NOT NULL,
description character varying(64) NOT NULL,
cost_price numeric(7,2),
sell_price numeric(7,2),
CONSTRAINT item_pk PRIMARY KEY (item_id )
)
WITH (
OIDS=FALSE
);
ALTER TABLE item
OWNER TO neil;以上我直接從pgadmin 3 上的sql pane copy 下來的，是我模擬器上的現有數據，所以以上語句沒有經過測試 !
http://www.postgresql.org/docs/9.1/interactive/index.html
有問題的話,可以手冊一下!
接下來我們還要對postgresql 進行一些配置已經進行外部的訪問 ...
先進行訪問授權 ...
#vim $PG_ROOT/data/pg_hda.conf
host bpsimple neil all trust
#vim postgresql.conf
listen_addresses = '*'
port = 5432
設置完監聽端口後我們重啓一下postgresql ...
su $PGUSER -c "$PGCTL stop -D '$PGDATA' -m fast"
su $PGUSER -c "$PGDAEMON -D '$PGDATA' &" >>$PGLOG 2>&1
具體環境變量視不同機子而定，好吧，主題開始，首先編寫一個pg類 ...
#vim ./pgphp/dbconn.php
<?php
class dbconn {
private $linkid; // PostgreSQL link identifier
private $host; // PostgreSQL server host
private $db; // PostgreSQL database
private $user; // PostgreSQL user
private $passwd; // PostgreSQL password
private $result; // Query result
private $querycount; //Total queries excuted
/* Class constructor. Initializes the $host, $user, $passwd
and $db fields. */
function __construct($host, $db, $user, $passwd) {
$this->host = $host;
$this->user = $user;
$this->passwd = $passwd;
$this->db = $db;
}
/* Connects to the PostgreSQL Database */
function connect() {
try {
$this->linkid = @pg_connect("host=$this->host dbname=$this->db
user=$this->user password=$this->passwd");
if (!$this->linkid)
throw new Exception("Could not connect to PostgreSQL server.");
} catch (Exception $e) {
die($e->getMessage());
}
}
/* Execute database query. */
function query($query) {
try {
$this->result = @pg_query($this->linkid, $query);
if (!$this->result)
throw new Exception("The database query failed.");
} catch (Exception $e) {
echo $e->getMessage();
}
$this->querycount++;
return $this->result;
}
/* Determine total rows affected by query. */
function affectedRows() {
$count = @pg_affected_rows($this->linkid);
return $count;
}
/* Determine total rows returned by query */
function numRows() {
$count = @pg_num_rows($this->result);
return $count;
}
/* Return query result row as an object. */
function fetchObject() {
$row = @pg_fetch_object($this->result);
return $row;
}
/* Return query result row as an indexed array. */
function fetchRow() {
$row = @pg_fetch_row($this->result);
return $row;
}
/* Return query result row as an associated array. */
function fetchArray() {
$row = @pg_fetch_array($this->result);
return $row;
}
/* Return total number of queries executed during
lifetime of this object. Not required, but
interesting nonetheless. */
function numQueries() {
return $this->querycount;
}
}
?>
然後開始進行調用吧 ...
#vim dbtest.php
<html>
<title> pgtest</title>
<?php
require_once 'dbconn.php';
$db = new dbconn("localhost", "bpsimple", "postgres", "");
$db->connect();
$db->query('SELECT * FROM item');
echo 'number of row:' . $db->numRows();
?>
</html>
接下來就可以訪問 http://hostname/pgphp/dbtest.php
它會輸入 item 的行數 ...
QQ:213572677 && linux c ph sql
Reference :
Beginning.PHP.and.PostgreSQL.8.From.Novice.to.Professional.Feb.2006
Beginning.Databases.With.PostgreSQL-From.Novice.To.Professional.2nd.Edition
2012/4/10補充的sql初始化：
#su postgres
pg$ /tmp/lnpp/pgsql/bin/createuser neil
$ /tmp/lnpp/pgsql/bin/createdb bpsimple
$ /tmp/lnpp/pgsql/bin/psql -U neil -d bpsimple
create table item
(
item_id serial,
description varchar(64) not null,
cost_price numeric(7,2),
sell_price numeric(7,2),
CONSTRAINT item_pk PRIMARY KEY(item_id)
);
INSERT INTO item(description, cost_price, sell_price)
VALUES('Wood Puzzle', 15.23, 21.95);
INSERT INTO item(description, cost_price, sell_price)
VALUES('Rubik Cube', 7.45, 11.49);
INSERT INTO item(description, cost_price, sell_price)
VALUES('Linux CD', 1.99, 2.49);
INSERT INTO item(description, cost_price, sell_price)
VALUES('Tissues', 2.11, 3.99);
INSERT INTO item(description, cost_price, sell_price)
VALUES('Picture Frame', 7.54, 9.95);
INSERT INTO item(description, cost_price, sell_price)
VALUES('Fan Small', 9.23, 15.75);
INSERT INTO item(description, cost_price, sell_price)
VALUES('Fan Large', 13.36, 19.95);
INSERT INTO item(description, cost_price, sell_price)
VALUES('Toothbrush', 0.75, 1.45);
INSERT INTO item(description, cost_price, sell_price)
VALUES('Roman Coin', 2.34, 2.45);
INSERT INTO item(description, cost_price, sell_price)
VALUES('Carrier Bag', 0.01, 0.0);
INSERT INTO item(description, cost_price, sell_price)
VALUES('Speakers', 19.73, 25.32);2012/4/11 補充
有關有無密碼登錄,主要是在pg_hda.conf裏面進行修改
host bpsimple neil all trust (無密碼登錄）
host bpsimple neil all md5 ( 需要密碼）local bpsimple neil all trust (無密碼登錄）
設置用戶密碼:
#su postgres
$/tmp/lnpp/pgsql/bin/psql -d dbname -U postgres -c "alter role postgres password ‘yourpassword’;"