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Encapsulation of PHP connection to database
- 巴扎黑Original
- 2016-11-23 10:42:381569browse
/**
* @Author:jilongliang
* @Date:2012/09/17
* @Description: Database encapsulation
* @Version:version1.0
*/
/*
* Import configuration file
*/
require '../config/config.php';
// require 'org.php/util/global.php';
/**
* Get database connection
*/
function Connect(){
//global means global variable, the intention is to use this variable in the function It can also be accessed externally
global $_conn;
if (!$_conn = @mysql_connect(DB_HOSTNAME,DB_USERNAME,DB_PASSWORD)) {
exit('Database connection failed');
}
}
/* *
* select_db selects a database
* @return void
*/
function Select_Db() {
if (!mysql_select_db(DB_DATABASE)) {
exit('The specified database cannot be found');
}
}
/**
* Set the field encoding of the database
*/
function Set_Names() {
if (!mysql_query('SET NAMES UTF8')) {
exit('Character set error');
}
}
/**
*Query
*/
function Query($_sql) {
if (!$_result = mysql_query($_sql)) {
exit('SQL execution failed'.mysql_error());
}
return $_result;
}
/**
* fetch_array can only obtain one data group from the specified data set
* @param $_sql
*/
function Fetch_array($_sql) {
Return mysql_fetch_array(Query($_sql),MYSQL_ASSOC);
}
/* *
* fetch_array_list can return all data in the specified data set
* @param $_result
*/
function Fetch_array_list($_result) {
return mysql_fetch_array($_result,MYSQL_ASSOC);
}
/**
* Number row
*/
function Num_rows($_result) {
Return mysql_num_rows($_result);
}
/**
* affected_rows indicates the number of records affected
*/
function Affected_rows() {
Return mysql_affected_rows();
}
/**
* free_result destroys (releases) the result set
* @param $_result
*/
function Free_result($_result) {
mysql_free_result($_result);
}
/**
* insert_id
*/
function Insert_id() {
return mysql_insert_id();
}
/**
*Array SQL to determine whether it is duplicated
* @param $_sql
* @param $_info
*/
function Is_repeat($_sql,$_info) {
if (Fetch_array($_sql)) {
alert_back($_info);
}
}
/**
* Release resources
*/
function ResaseResource() {
if (!mysql_close()) {
exit('Close exception');
}
}
/**
* alert_back() table is a JS pop-up window
* @access public
* @param $_info
* @return void pop-up window
*/
function alert_back($_info) {
echo "