我有以下代码，我从互联网上获取“检查用户名可用性”。
它是用mysql_*编写的，但我想将其转换为mysqli_*，因为PHP7中不再支持mysql_*。
但转换后它不起作用，用户名不会被检查，我总是变成绿色勾选。
我尝试了OOP编程也是程序，最后我在mysql的最后添加了一个“i”for mysqli。这是mysql_ *的代码。任何人都可以帮忙转换吗？
文件 dbConnector.php ：
<?php
class DbConnector {
var $theQuery;
var $link;
function DbConnector(){
// Get the main settings from the array we just loaded
$host = 'localhost';
$db = 'accesspi';
$user = 'root';
$pass = '';
// Connect to the database
$this->link = mysql_connect($host, $user, $pass);
mysql_select_db($db);
register_shutdown_function(array(&$this, 'close'));
}
//*** Function: query, Purpose: Execute a database query ***
function query($query) {
$this->theQuery = $query;
return mysql_query($query, $this->link);
}
//*** Function: fetchArray, Purpose: Get array of query results ***
function fetchArray($result) {
return mysql_fetch_array($result);
}
//*** Function: close, Purpose: Close the connection ***
function close() {
mysql_close($this->link);
}
}
?>
档案 check.php
<?php
include("dbConnector.php");
$connector = new DbConnector();
$username = trim(strtolower($_POST['username']));
$username = mysql_escape_string($username);
$query = "SELECT username FROM admin WHERE username = '$username' LIMIT 1";
$result = $connector->query($query);
$num = mysql_num_rows($result);
echo $num;
mysql_close();
?>
使用javascript代码
文件 index.php<link href="../style.css" rel="stylesheet" type="text/css" />
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.js"></script>
<script>
$(document).ready(function(){
$('#username').keyup(username_check);
});
function username_check(){
var username = $('#username').val();
if(username == "" || username.length < 4){
$('#username').css('border', '3px #CCC solid');
$('#tick').hide();
}else{
jQuery.ajax({
type: "POST",
url: "check.php",
data: 'username='+ username,
cache: false,
success: function(response){
if(response == 1){
$('#username').css('border', '3px #C33 solid');
$('#tick').hide();
$('#cross').fadeIn();
}else{
$('#username').css('border', '3px #090 solid');
$('#cross').hide();
$('#tick').fadeIn();
}
}
});
}
}
</script>
<style>
#username{
padding:3px;
font-size:18px;
border:3px #CCC solid;
}
#tick{display:none}
#cross{display:none}
</style>
</head>
<body>
Username: <input name="username" id="username" type="text" />
<img id="tick" src="tick.png" width="16" height="16"/>
<img id="cross" src="cross.png" width="16" height="16"/>
</body>
</html>
转换后的文件dbConnector。 PHP
<?php
class DbConnector {
var $result;
var $conn;
function DbConnector(){
// Get the main settings from the array we just loaded
$host = 'localhost';
$db = 'accesspi';
$user = 'root';
$pass = '';
// Connect to the database
$conn= mysqli_connect($host, $user, $pass, $db);
}
//*** Function: query, Purpose: Execute a database query ***
function query($query) {
$result = $conn->query($query);
}
//*** Function: fetchArray, Purpose: Get array of query results ***
function fetchArray($result) {
return $result->fetch_array(MYSQLI_ASSOC);
}
//*** Function: close, Purpose: Close the connection ***
function close() {
$conn->close();
}
}
?>
和check.php
<?php
include("dbConnector.php");
$connector = new DbConnector();
if (isset($_POST['username'])){
$username = trim(strtolower($_POST['username']));
$username = $connector->real_escape_string($username);
$query = "SELECT username FROM admin WHERE username = '$username' LIMIT 1";
$result = $connector->query($query);
$num = $result->num_rows;
echo $num;
$connector->close();
}
?>
答案 0 :(得分：-2)
试试这个：
<?php
class DbConnector {
private $theQuery;
private $link;
public function __construct(){
// Get the main settings from the array we just loaded
$host = 'localhost';
$db = 'accesspi';
$user = 'root';
$pass = '';
// Connect to the database
$this->link = new mysqli($host, $user, $pass,$db);
register_shutdown_function(array(&$this, 'close'));
}
/**
* Function: query, Purpose: Execute a database query
* @param $query
* @return bool|mysqli_result
*/
public function query($query) {
$this->theQuery = $query;
return $this->link->query($query);
}
/**
* Function: fetchArray, Purpose: Get array of query results
* @param $result mysqli_result
* @return mixed
*/
public function fetchArray($result) {
return $result->fetch_array();
}
/**
* Function: close, Purpose: Close the connection
*/
public function close() {
if(isset($this->link)){
$this->link->close();
unset($this->link);
}
}
/**
* @return mysqli
*/
public function getLink(){
return $this->link;
}
}
check.php：
<?php
include("dbConnector.php");
$connector = new DbConnector();
$username = filter_input(INPUT_POST,'username',FILTER_SANITIZE_STRING);
$username = $connector->getLink()->real_escape_string($username);
$query = "SELECT username FROM admin WHERE username = '$username' LIMIT 1";
$result = $connector->query($query);
$num = $result->num_rows;
echo $num;
$connector->close();