Question

我是脚本新手，我尝试在教程后用javascript分页数据库结果，但是不起作用，它给出了一些错误，我按照所有步骤，如果我在脚本，但我没有找到任何东西..我会把错误

警告：mysqli_query（）：无法在第6行 C：.. \ localweb \ test-pagini.php中获取mysqli

警告：mysqli_fetch_row（）要求参数1为mysqli_result ，在第7行的C：.. \ localweb \ test-pagini.php中给出null

警告：mysqli_close（）：无法在第19行 C：... \ localweb \ test-pagini.php中获取mysqli

这是代码

//名为mysqli_connection.php的连接

<?php
$servername = "localhost";
$username = "root";
$password = "";
$dbname = "db";


//create connection to mysql
$db_conx = mysqli_connect($servername, $username, $password, $dbname);
if(!$db_conx){
 die("Connection failed: ". mysqli_connect_error());
}
// create table
$users = "CREATE TABLE IF NOT EXISTS users(
   id INT(11) NOT NULL AUTO_INCREMENT,
   titlu VARCHAR(50) NOT NULL,
   descriere VARCHAR(50) NOT NULL,
   data DATE NOT NULL,
   approved ENUM('0','1') DEFAULT '1',
   PRIMARY KEY (id) 
)";


//confirm success or fail
$query = mysqli_query($db_conx, $users);
if(mysqli_query($db_conx, $users)){
 echo "<h2>Success user table</h2>";
}else{
 echo "<h2>Fail user table</h2>";
 echo mysqli_error($db_conx);
}
// Close the database connection
mysqli_close($db_conx);
?>

//现在是test-pagini.php

<?php
// Connect to our database here
include_once("/mysqli_connection.php");
// This first query is just to get the total count of rows
$sql = "SELECT COUNT(id) FROM users WHERE approved='1'";
$query = mysqli_query($db_conx, $sql);
$row = mysqli_fetch_row($query);
// Here we have the total row count
$total_rows = $row[0];
// Specify how many results per page
$rpp = 10;
// This tells us the page number of our last page
$last = ceil($total_rows/$rpp);
// This makes sure $last cannot be less than 1
if($last < 1){
    $last = 1;
}
// Close the database connection
mysqli_close($db_conx);
?>
<!DOCTYPE html>
<html>
<head>
<script>
var rpp = <?php echo $rpp; ?>; // results per page
var last = <?php echo $last; ?>; // last page number
function request_page(pn){
    var results_box = document.getElementById("results_box");
    var pagination_controls = document.getElementById("pagination_controls");
    results_box.innerHTML = "loading results ...";
    var hr = new XMLHttpRequest();
    hr.open("POST", "/pagini_plugin.php", true);
    hr.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
    hr.onreadystatechange = function() {
        if(hr.readyState == 4 && hr.status == 200) {
            var dataArray = hr.responseText.split("||");
            var html_output = "";
            for(i = 0; i < dataArray.length - 1; i++){
                var itemArray = dataArray[i].split("|");
                html_output += "ID: "+itemArray[0]+" - Testimonial from <b>"+itemArray[1]+"</b><hr>";
            }
            results_box.innerHTML = html_output;
        }
    }
    hr.send("rpp="+rpp+"&last="+last+"&pn="+pn);
    // Change the pagination controls
    var paginationCtrls = "";
    // Only if there is more than 1 page worth of results give the user pagination controls
    if(last != 1){
        if (pn > 1) {
            paginationCtrls += '<button onclick="request_page('+(pn-1)+')">&lt;</button>';
        }
        paginationCtrls += ' &nbsp; &nbsp; <b>Page '+pn+' of '+last+'</b> &nbsp; &nbsp; ';
        if (pn != last) {
            paginationCtrls += '<button onclick="request_page('+(pn+1)+')">&gt;</button>';
        }
    }
    pagination_controls.innerHTML = paginationCtrls;
}
</script>
</head>
<body>
<div id="pagination_controls"></div>
<div id="results_box"></div>
<script> request_page(1); </script>
</body>
</html>

//和pagini_plugin.php

<?php
// Make the script run only if there is a page number posted to this script
if(isset($_POST['pn'])){
    $rpp = preg_replace('#[^0-9]#', '', $_POST['rpp']);
    $last = preg_replace('#[^0-9]#', '', $_POST['last']);
    $pn = preg_replace('#[^0-9]#', '', $_POST['pn']);
    // This makes sure the page number isn't below 1, or more than our $last page
    if ($pn < 1) { 
        $pn = 1; 
    } else if ($pn > $last) { 
        $pn = $last; 
    }
    // Connect to our database here
    include_once("mysqli_connection.php");
    // This sets the range of rows to query for the chosen $pn
    $limit = 'LIMIT ' .($pn - 1) * $rpp .',' .$rpp;
    // This is your query again, it is for grabbing just one page worth of rows by applying $limit
    $sql = "SELECT id, titlu, descriere, data FROM testimonials WHERE approved='1' ORDER BY id DESC $limit";
    $query = mysqli_query($db_conx, $sql);
    $dataString = '';
    while($row = mysqli_fetch_array($query, MYSQLI_ASSOC)){
        $id = $row["id"];
        $titlu = $row["titlu"];
        $descriere = $row["descriere"];
        $itemdate = strftime("%b %d, %Y", strtotime($row["data"]));
        $dataString .= $id.'|'.$firstname.'|'.$lastname.'|'.$itemdate.'||';
    }
    // Close your database connection
    mysqli_close($db_conx);
    // Echo the results back to Ajax
    echo $dataString;
    exit();
}
?>

我使用了easyPhp v14.1和Windows7。

Answer 1

您已快速关闭数据库连接：

mysqli_close($db_conx);

mysqli_connection.php

结束时

包含在 test-pagini.php

中

连接关闭，然后无法获取..

注意：

include_once("/mysqli_connection.php");

删除＆＃34; /＆＃34;，是正确的路径语法

注2：

在 pagini_plugin.php

的第一行

if(isset($_POST['pn'])){

使用empty而不是isset，以避免空查询该本机函数，避免与isset相同的行为（二合一）看看差异：empty() VS isset()

if(!empty($_POST['pn'])){

编辑：

实际上你的迭代太多错误要继续留在评论框中.. 我认为问题得到了回答，而且还有更多。

寻找现代系统：由于过时和错误的编码方法，您将节省大量时间，错误很多。

PHP, MYSQL, HTML table with tablesorter

http://tablesorter.com/docs/#Examples

（sry但是我没有更多的时间来帮助你，8小时的堆栈溢出，我已经睡了:)）

Answer 2

我认为这是因为你正在关闭文件末尾的mysqli_connection.php中的连接。

// Close the database connection mysqli_close($db_conx);

警告：mysqli_query（）：无法在第6行的C：\ ... \ localweb \ test-pagini.php中获取mysqli

2 个答案: