PHP 5.5.0版之前的php+mysql的鏈接方法

PHP 5.5.0版之前的php+mysql的鏈接方法

1、基礎操做

  1. 發起會話 $conn = @mysql_connect($host,$name,$pwd);
  2. 選擇數據庫 @mysql_select_db($db,$conn);
  3. 設置參數(如:編碼) mysql_query("set names gb2312"); //設置編碼
  4. 操做(CURL)
  5. 關閉會話 mysql_close($conn);

2、封裝類庫

目錄

| pro 項目目錄
 | -- | mysql.php
 | -- | index.php

文件mysql.php

<?php
//PHP 5.5.0版之前
class mysql {
	private $host = 'localhost'; //服務器地址
	private $name = 'root'; //登陸帳號
	private $pwd = 'root'; //登陸密碼
	private $db = 'db'; //數據庫名稱
	private $conn = ''; //數據庫鏈接資源
	private $result = ''; //結果集
	private $msg = ''; //返回結果
	private $fields; //返回字段
	private $fieldsNum = 0; //返回字段數
	private $rowsNum = 0; //返回結果數
	private $rowsRst = ''; //返回單條記錄的字段數組
	private $filesArray = array(); //返回字段數組
	private $rowsArray = array(); //返回結果數組
	
	function __construct($host='',$name='',$pwd='',$db=''){
		if(!empty($host)) $this->host = $host;
		if(!empty($name)) $this->name = $name;
		if(!empty($pwd)) $this->pwd = $pwd;
		if(!empty($db)) $this->db = $db;
		$this->init_conn();
	}
	//鏈接數據庫
	function init_conn(){
		$this->conn = @mysql_connect($this->host,$this->name,$this->pwd);
		@mysql_select_db($this->db,$this->conn);
		mysql_query("set names gb2312"); //設置編碼
	}
	//查詢結果
	function mysql_query_rst($sql){
		if($this->conn == '') $this->init_conn();
		$this->result = @mysql_query($sql,$this->conn);
	}
	//返回查詢記錄數函數
	function getRowsNum($sql){
		$this->mysql_query_rst($sql);
		if(mysql_errno() == 0){
			return @mysql_num_rows($this->result);
		}else{
			return '';
		}
	}
	//取得記錄數函數
	function getRowsRst($sql){
		$this->mysql_query_rst($sql);
		if(mysql_errno() == 0){
			$this->rewsRst = mysql_fetch_array($this->result,MYSQL_ASSOC);
			return $this->rewsRst;
		}else{
			return '';
		}
	}
	//取得記錄數組(多條記錄)
	function getRowsArray($sql){
		$this->mysql_query_rst($sql);
		if(mysql_errno() == 0){
			while($row = mysql_fetch_array($this->result,MYSQL_ASSOC)){
				$this->rowsArray[] = $row;
			}
			return $this->rowsArray;
		}else{
			return '';
		}
	}
	//返回更新、刪除、添加的記錄數函數
	function uidRst($sql){
		if($this->conn == '') $this->init_conn();
		@mysql_query($sql);
		$this->rowsNum = @mysql_affected_rows();
		if(mysql_errno() == 0){
			return $this->rowsNum;
		}else{
			return '';
		}
	}
	//釋放結果集函數
	function close_rst(){
		mysql_free_result($this->result);
		$this->msg = '';
		$this->fieldsNum = 0;
		$this->rowsNum = 0;
		$this->filesArray = '';
		$this->rowsArray = '';
	}
	//關閉數據庫函數
	function close_conn(){
		$this->close_rst();
		mysql_close($this->conn);
		$this->conn = '';
	}
}
?>

文件index.php

<?php
//使用方法
require_once('mysql.php');
$mysql = new mysql();
$sql = "SELECT * FROM `user` WHERE id=1";
var_dump($opmysql->getRowsRst($sql));
die();
?>
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