Detailed explanation of steps to operate Postgresql encapsulation class with PHP

This time I will bring you a detailed explanation of the steps for operating the Postgresql encapsulation class in PHP. What are the precautions for PHP operating the Postgresql encapsulation class? Here are actual cases, let’s take a look.

This class encapsulates some commonly used functions. The original post also contains transaction processing content. Let’s learn more about it later.

Class file definition:

<?php
class pgsql {
private $linkid; // PostgreSQL连接标识符
private $host; // PostgreSQL服务器主机
private $port; // PostgreSQL服务器主机端口
private $user; // PostgreSQL用户
private $passwd; // PostgreSQL密码
private $db; // Postgresql数据库
private $result; // 查询的结果
private $querycount; // 已执行的查询总数
/* 类构造函数，用来初始化$host、$user、$passwd和$db字段。 */
function construct($host, $port ,$db, $user, $passwd) {
$this->host = $host;
$this->port = $port;
$this->user = $user;
$this->passwd = $passwd;
$this->db = $db;
}
/* 连接Postgresql数据库 */
function connect(){
try{
$this->linkid = @pg_connect("host=$this->host port=$this->port dbname=$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());
}
}
/* 执行数据库查询。 */
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;
}
/* 确定受查询所影响的行的总计。 */
function affectedRows(){
$count = @pg_affected_rows($this->linkid);
return $count;
}
/* 确定查询返回的行的总计。 */
function numRows(){
$count = @pg_num_rows($this->result);
return $count;
}
/* 将查询的结果行作为一个对象返回。 */
function fetchObject(){
$row = @pg_fetch_object($this->result);
return $row;
}
/* 将查询的结果行作为一个索引数组返回。 */
function fetchRow(){
$row = @pg_fetch_row($this->result);
return $row;
}
/* 将查询的结果行作为一个关联数组返回。 */
function fetchArray(){
$row = @pg_fetch_array($this->result);
return $row;
}
/* 返回在这个对象的生存期内执行的查询总数。这不是必须的，但是您也许会感兴趣。 */
function numQueries(){
return $this->querycount;
}
}
?>

The tested php was released together, and another postgresql server in the LAN was tested. I feel that the query speed is still very fast, and the query of postgregis data is also good. drop.

<?php
  include &#39;PGDB.php&#39;;
  $PG = new pgsql("192.168.1.167", "5432", "postgis", "postgres", "post");
  $PG->connect();
  if(!$PG)
  {
    $db_error = "无法连接到PostGreSQL数据库！";
    echo $db_error;
  }
  else
  {
    echo "成功连接！";
    $query = "select name from ex where gid = 2";
    $result = $PG->query($query);
    $row = $PG->fetchRow();
    echo $row[0];
  }
?>

I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!

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