PHP基本連接數據庫

由於要調試JS的AJAX，JAVA寫感覺不夠輕便，所以直接撿起了原來的PHP，來做測試用。

最簡單的代碼

connect.php

<?php
$host="localhost";
$db_user="root";
$db_pass="";
$db_name="demo";
$timezone="Asia/Shanghai";

$link=mysql_connect($host,$db_user,$db_pass);
mysql_select_db($db_name,$link);
mysql_query("SET names UTF8");

header("Content-Type: text/html; charset=utf-8");
?>

search.php

<?php
include_once("connect.php");

$q = strtolower($_GET["term"]);
$query=mysql_query("select * from test where title like '$q%' limit 0,10");

while ($row=mysql_fetch_array($query)) {
	$result[] = array(
		    'id' => $row['id'],
		    'label' => $row['title']
	);
}
echo json_encode($result);
?>

sql

CREATE TABLE `art` (
  `id` int(11) NOT NULL auto_increment,
  `title` varchar(100) NOT NULL,
  PRIMARY KEY  (`id`)
) ENGINE=MyISAM  DEFAULT CHARSET=utf8 AUTO_INCREMENT=15 ;


INSERT INTO `art` (`id`, `title`) VALUES
(1, 'jstest1'),
(2, 'jstest2'),
(3, 'jstest3'),
(4, 'jstest4'),
(5, 'jstest5'),
(6, 'jstest6');

分開寫的連接數據庫

common.ini

<?php

//非法調用判斷
if(!defined('Inc_Tag')){
	exit("非法調用");
}
//硬路徑轉換
define('ROOT_PATH', substr(dirname(__FILE__), 0,-8));

//版本判斷
if (PHP_VERSION<4.0){
	exit("版本太低");
}
require ROOT_PATH.'\includes\global.func.php';
require ROOT_PATH.'\includes\mysql.func.php';
define('start_time', _runtime());

//數據庫連接
define('DB_HOST','Localhost');
define('DB_NAME','test');
define('DB_USER','root');
define('DB_PASSWORD','123456');
//初始化數據庫
_connect();   //連接MYSQL數據庫
_select_db();   //選擇指定的數據庫
_set_names();   //設置字符集

?>

mysql.php

<?php
//防止惡意調用
if(!defined('Inc_Tag')){
	exit();
}
/**
   _connect()數據庫連接函數
 */
function _connect() {
	//global表示全局變量的意思，意思是此變量在函數外部也可使用
	global $_conn;
	if(!$conn=mysql_connect(DB_HOST,DB_USER,DB_PASSWORD)){
		exit("數據庫連接失敗".mysql_error());
	}
}

/**
 * 
 * _select_db()選擇數據庫
 */
function _select_db(){
	if(!mysql_select_db(DB_NAME)){
		exit("ERROR".mysql_error());
	}
}

/**
 * 
 * _set_names()設置字符集
 */
function _set_names(){
	if(!mysql_query('SET NAMES UTF8')){
		exit('ERROR'.mysql_error());
	}
}
/**
 * 
 * _query()查詢語句
 * @param unknown_type $sql
 */
function _query($_sql){
	if (!$_result=mysql_query($_sql)){
		exit('SQL FAILED'.mysql_error());
	}
	return $_result;
}

/**
 * 
 * Enter description here ...
 * @param unknown_type $_sql
 */
function _fetch_array($_sql){
	return mysql_fetch_array(_query($_sql),MYSQL_ASSOC);
}

/**
 * 
 * fetch_array_list($_result)在結果中讀取關聯數組
 * @param unknown_type $_result
 */
function _fetch_array_list($_result){
   return mysql_fetch_array($_result,MYSQL_ASSOC);	
}

/**
 * 
 * Enter description here ...
 * @param unknown_type $_sql
 * @param unknown_type $_info
 */
function _is_repeat($_sql,$_info){
	if(_fetch_array($_sql)){
		_alert_back($_info);
	}
}

/**
 * 
 * Enter description here ...
 */
function _affected_rows() {
	return mysql_affected_rows();
}





/**
 * 
 * _close關閉數據庫連接
 */
function _close(){
	if (!mysql_close()){
		exit("關閉異常".mysql_error());
	}
}


?>

global.fun

<?php
function _runtime(){
	$_mtime=explode(' ', microtime());
$_temp_time=$_mtime[1]+$_mtime[0];
return $_temp_time;
}
/**
 * 
 * _alert_back()對話框彈出函數，然後返回一步
 * @param  $msg //彈出對話框消息
 * @return void
 */
function _alert_back($msg){
	echo "<script type='text/javascript'>alert('".$msg."');history.back();</script>";
	exit();
}


/**
 * 
 * _alert_close()彈出消息，關閉
 * @param unknown_type $msg
 */

function _alert_close($msg){
	echo "<script type='text/javascript'>alert('".$msg."');window.close();</script>";
	exit();
}


function _get_xml($_xml_file){
	if (file_exists($_xml_file)){
		$_xml=file_get_contents($_xml_file);
		preg_match_all('/<vip>(.*)<\/vip>/s',$_xml,$_dom);
		echo $_dom[1];
	foreach ($_dom[1] as $_value) {
			preg_match_all('/<id>(.*)<\/id>/s',$_value,$_id);
			print_r($_id);
			preg_match_all('/<username>(.*)<\/username>/s',$_value,$_username);
			preg_match_all( '/<sex>(.*)<\/sex>/s', $_value, $_sex);
			preg_match_all( '/<face>(.*)<\/face>/s', $_value, $_face);
			preg_match_all( '/<email>(.*)<\/email>/s', $_value, $_email);
			preg_match_all( '/<url>(.*)<\/url>/s', $_value, $_url);
			$_html['id'] = $_id[1][0];
			$_html['username'] = $_username[1][0];
			$_html['sex'] = $_sex[1][0];
			$_html['face'] = $_face[1][0];
			$_html['email'] = $_email[1][0];
			$_html['url'] = $_url[1][0];
		}
	} else {
		echo '文件不存在';
	}
	return $_html;
}
/**
 * 
 * Enter description here ...
 * @param unknown_type $_xmlfile
 * @param unknown_type $_clean
 */
function _set_xml($_xmlfile,$_clean) {
	$_fp = @fopen('new.xml','w');
	if (!$_fp) {
		exit('系統錯誤，文件不存在！');
	}
	flock($_fp,LOCK_EX);
	
	$_string = "<?xml version=\"1.0\" encoding=\"utf-8\"?>\r\n";
	fwrite($_fp,$_string,strlen($_string));
	$_string = "<vip>\r\n";
	fwrite($_fp,$_string,strlen($_string));
	$_string = "\t<id>{$_clean['id']}</id>\r\n";
	fwrite($_fp,$_string,strlen($_string));
	$_string = "\t<username>{$_clean['username']}</username>\r\n";
	fwrite($_fp,$_string,strlen($_string));
	$_string = "\t<sex>{$_clean['sex']}</sex>\r\n";
	fwrite($_fp,$_string,strlen($_string));
	$_string = "\t<face>{$_clean['face']}</face>\r\n";
	fwrite($_fp,$_string,strlen($_string));
	$_string = "\t<email>{$_clean['email']}</email>\r\n";
	fwrite($_fp,$_string,strlen($_string));
	$_string = "\t<url>{$_clean['url']}</url>\r\n";
	fwrite($_fp,$_string,strlen($_string));
	$_string = "</vip>";
	fwrite($_fp,$_string,strlen($_string));
	
	flock($_fp,LOCK_UN);
	fclose($_fp);
}
/**
 * 
 * _location()跳轉函數
 * @param unknown_type $_msg
 * @param unknown_type $_url
 */

function _location($_msg,$_url){
	if (!empty($_msg)){
	echo "<script type='text/javascript'>alert('$_msg');location.href='$_url';</script>";
	exit();
	}else {
		header('location:'.$_url);
	}
	
}

function _title($_string){
	if(mb_strlen($_string,'utf-8')>14){
		return mb_substr($_string, 1,6,'utf-8').'...';
	}
	return $_string;
}

/**
 * 
 * _html()對數組或者字符串進行html過濾
 * @param array or string $_string
 * @return string or array
 */
function _html($_string){
	if (is_array($_string)){
		foreach ($_string as $_key=>$_value){
			$_string[$_key]=_html($_value);//採用遞歸對其進行html過濾
		}
	}else {
		$_string=htmlspecialchars($_string);
	}
	return $_string;
}

/**
 * 
 * _page()對查詢的進行分頁處理，
 * @param unknown_type $_sql
 * @param unknown_type $_size
 */
function _page($_sql,$_size) {
	//將裏面的所有變量取出來，外部可以訪問
	global $_page,$_pagesize,$_pagenum,$_pageabsolute,$_num;
	if (isset($_GET['page'])) {
		$_page=$_GET['page'];
		if (empty($_page) || $_page < 0 || !is_numeric($_page)) {
			$_page=1;
		} else {
			$_page=intval($_page);
		}
	} else {
		$_page=1;
	}
	$_pagesize=$_size;
	$_num=mysql_num_rows(_query($_sql));
	if ($_num==0) {
		$_pageabsolute=1;
	} else {
		$_pageabsolute=ceil($_num/$_pagesize);
	}
	if ($_page>$_pageabsolute) {
		$_page=$_pageabsolute;
	}
	$_pagenum=($_page - 1) * $_pagesize;
}

/**
 * 
 */
function _paging($_type) {
	global $_page,$_pageabsolute,$_num;
	if ($_type==1) {
		echo '<div id="page_num">';
		echo '<ul>';
				for ($i=0;$i<$_pageabsolute;$i++) {
						if ($_page==($i+1)) {
							echo '<li><a href="'.Script.'.php?page='.($i+1).'" class="selected">'.($i+1).'</a></li>';
						} else {
							echo '<li><a href="'.Script.'.php?page='.($i+1).'">'.($i+1).'</a></li>';
						}
				}
		echo '</ul>';
		echo '</div>';
	} elseif ($_type==2) {
		echo '<div id="page_text">';
		echo '<ul>';
		echo '<li>'.$_page.'/'.$_pageabsolute.'頁 | </li>';
		echo '<li>共有<strong>'.$_num.'</strong>個會員 | </li>';
				if ($_page==1) {
					echo '<li>首頁 | </li>';
					echo '<li>上一頁 | </li>';
				} else {
					echo '<li><a href="'.SCRIPT.'.php">首頁</a> | </li>';
					echo '<li><a href="'.SCRIPT.'.php?page='.($_page-1).'">上一頁</a> | </li>';
				}
				if ($_page==$_pageabsolute) {
					echo '<li>下一頁 | </li>';
					echo '<li>尾頁</li>';
				} else {
					echo '<li><a href="'.SCRIPT.'.php?page='.($_page+1).'">下一頁</a> | </li>';
					echo '<li><a href="'.SCRIPT.'.php?page='.$_pageabsolute.'">尾頁</a></li>';
				}
		echo '</ul>';
		echo '</div>';
	}
}



function _unsetcookies(){
	setcookie('username','',time()-1);
	setcookie('uniqid','',time()-1);
	session_destroy();
	_location(null,'index.php');
}
/**
 * _code() 註冊碼函數
 * @access public
 * @param $_width 驗證碼圖片寬
 * @param $_height 驗證碼圖片高
 * @param $_rnd_code 驗證碼位數
 * @param $_flag 是否顯示黑色邊框
 * @return void 返回一驗證碼圖片
 */

function _code($_width=75,$_height=25,$_rnd_code=4,$flag=FALSE){


//創建隨機碼
for ($i=0;$i<$_rnd_code;$i++) {
	$_nmsg .= dechex(mt_rand(0,15));
}

//保存在session
$_SESSION['code'] = $_nmsg;



//創建一張圖像
$_img = imagecreatetruecolor($_width,$_height);

//白色
$_white = imagecolorallocate($_img,255,255,255);

//填充
imagefill($_img,0,0,$_white);

$_flag = false;

if ($_flag) {
	//黑色,邊框
	$_black = imagecolorallocate($_img,0,0,0);
	imagerectangle($_img,0,0,$_width-1,$_height-1,$_black);
}

//隨即畫出6個線條
for ($i=0;$i<6;$i++) {
	$_rnd_color = imagecolorallocate($_img,mt_rand(0,255),mt_rand(0,255),mt_rand(0,255));
	imageline($_img,mt_rand(0,$_width),mt_rand(0,$_height),mt_rand(0,$_width),mt_rand(0,$_height),$_rnd_color);
}

//隨即雪花
for ($i=0;$i<100;$i++) {
	$_rnd_color = imagecolorallocate($_img,mt_rand(200,255),mt_rand(200,255),mt_rand(200,255));
	imagestring($_img,1,mt_rand(1,$_width),mt_rand(1,$_height),'*',$_rnd_color);
}

//輸出驗證碼
for ($i=0;$i<strlen($_SESSION['code']);$i++) {
	$_rnd_color = imagecolorallocate($_img,mt_rand(0,100),mt_rand(0,150),mt_rand(0,200));
	imagestring($_img,5,$i*$_width/$_rnd_code+mt_rand(1,10),mt_rand(1,$_height/2),$_SESSION['code'][$i],$_rnd_color);
}

//輸出圖像
header('Content-Type: image/png');
imagepng($_img);

//銷燬
imagedestroy($_img);
}

function _sha1_uniqid(){
	return sha1(uniqid(rand(),TRUE));
}

?>

查詢

<?php
/**
* TestGuest Version1.0
* ================================================
* Copy 2010-2012 yc60
* Web: http://www.yc60.com
* ================================================
* Author: Lee
* Date:2011-9-7
*/
error_reporting(E_ALL^E_NOTICE);
//定義常量，授權includes的包含文件
define('Inc_Tag', TRUE);
//定義常量，包含CSS文件
define('Script', 'blog');
//包含公共文件
require dirname(__FILE__).'/includes/common.inc.php';
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>hello gull記事本-博友界面</title>
<?php 
//包含CSS文件
require ROOT_PATH.'includes/title.inc.php';
?>
</head>
<body>
<?php 
//包含頭文件
require ROOT_PATH.'includes/header.inc.php';
//分頁模塊
global $_pagesize,$_pagenum;
_page("SELECT dg_id FROM tg_user",10);   //第一個參數獲取總條數，第二個參數，指定每頁多少條


//讀取數據庫信息
$_result=_query("SELECT t_username,t_sex,t_face FROM tg_user ORDER BY t_reg_time DESC limit $_pagenum,$_pagesize");
?>

<div id="blog">
<div>
<h2>博友信息</h2>

<?php while (!!$rows=_fetch_array_list($_result)){?>
<dl>
<dd class="user"><?php echo $rows['t_username']?>(<?php echo $rows['t_sex']?>)</dd>
<dt><img src="<?php echo $rows['t_face']?>" /></dt>
<dd class="message">發消息</dd>
<dd class="friend">加爲好友</dd>
<dd class="guest">寫留言</dd>
<dd class="flower">給他送花</dd>
</dl>

<?php }?>
<?php
_paging(1);
?>
</div>
<?php 
//包含尾部文件
require ROOT_PATH.'includes/footer.inc.php';
?>

</body>
</html>