Question

我的代码有4个文件。

第一个是主页：

<?php

    session_start();
    $pagetitle = "Schedules";

    include_once('head.php');
    include_once('navbar.php');

?>
<body>
    Name:<input type="text" id="DEPID" />
    <input type="submit" id="DEPID-Submit" value="Search for Flight" />
    <div id="DEPID-data"></div>
    <script src="jquery-1.8.2.min.js"></script>
    <script src="js/global.js"></script>
</body>
<?php

    include_once('footer.php');
    include_once('scripts.php'); 

 ?>

代码的第二部分是php编码：

<?php 

    if( isset($_POST['DEPID']) === true && empty($_POST['DEPID']) === false) {
        require'../db/connect.php';
        $query = mysql_query("SELECT * FROM Flights WHERE DEPID ='DEPID'");
        $result = mysql_query($query, $mysql_connect) or die(mysql_error()); 

        echo "<table><tr><th>Flight ID</th><th>Departure Airport</th><th>Arrival Airport</th><th>Distance</th></tr>";

        while($row = mysql_fetch_array($result)) {
            echo "<tr><td>" . $row['FLID'] . "</td><td>" . $row['DEPID'] . "</td><td>" . $row['ARRID'] . "</td><td>" . $row['Distance'] . "</td></tr>";
        }

        echo "</table>";    

    }

?>

代码的第三部分是我与数据库连接的地方：

    <?php
$link = mysql_connect('localhost', 'ak118043_ako', '2391990ak4726790');
if (!$link) {
    die('Not connected : ' . mysql_error());
}

// make foo the current db
$db_selected = mysql_select_db('ak118043_Project', $link);
if (!$db_selected) {
    die ('Can\'t use ak118043_Project : ' . mysql_error());
}
?>

第四个是ajax编码：

$('input#DEPID-Submit').on('click', function(){
    var DEPID= $('input#DEPID').val();
    if($.trim(DEPID) != ''){
        $.post('ajax/name.php', {DEPID: DEPID}, function(data){
            $('div#DEPID-data').text(data);
        });
    }
});

问题是以下错误消息：

警告：mysql_query（）期望参数1为字符串，资源在 /home/ak118043/public_html/ajax/name.php 在线提供 9

Answer 1

首先，您要查询两次并使用mysql_error()向您显示语法错误。

错误在于这两行：

$query = mysql_query("SELECT * FROM Flights WHERE DEPID ='DEPID'");
$result = mysql_query($mysql_connect,$query)or die ("Error");

删除第二行查询行中的mysql_query()作为第9行：

$result = ($mysql_connect,$query) or die ("Error");

但该行$mysql_connect似乎是您的连接变量，应该在之后而不是第一个，因为这是mysqli_语法。

$result = ($query, $mysql_connect) or die ("Error");

修改：看到您的连接代码后

这是不正确的。

mysql_connect("localhost","ak118043_ako", "2391990ak4726790", "ak118043_Project");

您正在使用四个参数，您应该只使用三个参数。 mysqli_而不是mysql_使用了四个参数。

在PHP.net http://php.net/manual/en/function.mysql-select-db.php中关注此示例，并使用您自己的凭据替换：

$link = mysql_connect('localhost', 'mysql_user', 'mysql_password');
if (!$link) {
    die('Not connected : ' . mysql_error());
}

// make foo the current db
$db_selected = mysql_select_db('foo', $link);
if (!$db_selected) {
    die ('Can\'t use foo : ' . mysql_error());
}

因为$mysql_connect未定义且您没有变量。

现在，而不是or die ("Error")执行or die(mysql_error())并获取真正的错误。

考虑转移到mysqli with prepared statements或PDO with prepared statements，他们更安全。

同样if( isset($_POST['DEPID']) === true && empty($_POST['DEPID']) ===false){您可以将其替换为if(!empty($_POST['DEPID'])){

编辑＃2 （快速mysqli重写让你前进）

将整个代码更改为以下内容：

<?php

$DB_HOST = 'localhost';
$DB_USER = 'xxx'; // change this to your own
$DB_PASS = 'xxx'; // change this to your own
$DB_NAME = 'your_database'; // change this to your own

$Link = new mysqli($DB_HOST, $DB_USER, $DB_PASS, $DB_NAME);
if($Link->connect_errno > 0) {
  die('Connection failed [' . $Link->connect_error . ']');
}

?>

然后

<?php 
if(!empty($_POST['DEPID'])){
    require'../db/connect.php';
$query = "SELECT * FROM Flights WHERE DEPID ='DEPID'";
$result = mysqli_query($Link, $query) or die(mysqli_error($Link)); 

echo "<table><tr><th>Flight ID</th><th>Departure Airport</th><th>Arrival Airport</th><th>Distance</th></tr>";

while($row = mysqli_fetch_array($result)) {
    echo "<tr><td>" . $row['FLID'] . "</td><td>" . $row['DEPID'] . "</td><td>" . $row['ARRID'] . "</td><td>" . $row['Distance'] . "</td></tr>";
}
echo "</table>";                                 
    }

保存面孔

根据您的修改$result = mysql_query($query, $mysql_connect)，您使用了错误的变量。 $mysql_connect它应该是$link

Answer 2

删除$result行，并在while周期更改变量名称。

$query = mysql_query("SELECT * FROM Flights WHERE DEPID ='DEPID'");                          
// $result = mysql_query($mysql_connect,$query)or die ("Error");     //Line 9                   
echo "<table><tr><th>Flight ID</th><th>Departure Airport</th><th>Arrival Airport</th><th>Distance</th></tr>";

while($row = mysql_fetch_array($query)) {...
                               ^^

或从第一行删除mysql_query：

$query = "SELECT * FROM Flights WHERE DEPID ='DEPID'";                          
$result = mysql_query($mysql_connect,$query)or die ("Error");     //Line 9                   
echo "<table><tr><th>Flight ID</th><th>Departure Airport</th><th>Arrival Airport</th><th>Distance</th></tr>";

while($row = mysql_fetch_array($result)) {...

mysql_query（）期望参数2是第9行的资源，给定布尔值

2 个答案: