我想在php中显示mysql数据库中的一行元素。我已经做到了，但是我的数据出现在一个长长的专栏里。我希望每一个新元素都一个接一个地出现。
这是我的截图。我希望第一个在第二个旁边：
https://www.dropbox.com/s/2y3g0n7hqrjp8oz/Capture.PNG?dl=0
这是我的代码：
<?php
require_once 'core/init.php';
include 'includes/navigation.php';
$sql = "SELECT * FROM interviews WHERE featured = 1";
$featured = $db->query($sql);
<html>
enter code hereenter code here <link href="http://localhost/menu/css/academy.css" rel="stylesheet" `enter code here`type="text/css" />
<?php while($product = mysqli_fetch_assoc($featured)) : ?>
<table>
<tr>
<th>
<div id="element1"></div>
<div id="content1">
<img src="<?= $product['image']; ?>" alt="<?= $product['title']; ?>">
<h4><?= $product['title']; ?></h4>
<hr>
<p class="description"><?= $product['description']; ?></p>
<!--------BUTTON 3-------->
<div id="hovers">
<a href="#" class="button">
<span class="contentbut"> Read More</span>
</a>
</div>
</th>
</tr>
</table>
<?php endwhile; ?>
</div>
</div>
求求你，救命。
谢谢您！
最佳答案
介绍
注意：此答案详细说明了如何创建多记录到一行的排列。但是，可以更改此答案以提供一条记录到一行的排列。
分离关注点有助于编写更干净的代码。分离关注点将使维护代码更容易。干净的代码是松散耦合的，没有嵌入依赖项的负担。干净代码在函数签名和类构造函数中标识其依赖关系，期望这些需求将在外部得到满足。干净的代码具有紧密的内聚性。这意味着函数/方法只有一个任务，类只有一个目标。干净的代码通常反映在已被分解和细化的任务中（但并不总是如此）。干净的代码是我追求的理想，但没有人是完美的。
试着想办法从html文件中获取尽可能多的sql和php。插值变量和显示函数的返回结果只能使您的html更易于阅读。好的html结构也很重要。
根据sql查询的结果动态构建<table>的任务很有可能被分解。最终，您可能会决定使用css和div来进行样式和响应。这段代码可以被修改来实现这一点（毕竟，您只需要将盒子成行地堆叠起来）。
最后，创建一个oop类（使用自定义名称空间）对于模块化代码和将绝大多数符号（变量名等）从全局名称空间中取出是非常有用的。
开始之前：php.ini:include_path
是否要为项目设置逻辑目录体系结构？
在include_path内设置php.ini。
如果在php.ini中搜索include_path设置，则可以将其设置为一个目录或任何适当目录组。这样，您就可以按您所需的方式在目录中排列文件，并且您的include、include_once、require和require_once语句仍然可以找到要导入的文件。您不必键入绝对路径（如/dir/dir/file.php）或相对路径（如../../core/database.php）。在这两种情况下，都可以指定文件名。
例子：
include 'file.php'; //Finds the file if it is in the include_path.
require 'database.php'; //Finds the file if it is in the include_path.
注意：将库文件和其他纯php编码文件（等等）放在webroot或任何可公开访问的目录之外。使它们在逻辑上高于webroot。设置
include_path以便您不必一直这样做。任务
1）首先，创建一个函数来获取
../../blah/foo对象的实例。/**
* Returns a string, or
* throws an UnexpectedValueException, otherwise.
*/
function isString($string)
{
if (!is_string($string)) {
throw new UnexpectedValueException("$string must be a string data type.");
}
return $string;
}
/**
* Returns a mysqli_result object, or throws an `UnexpectedValueException`.
* You can reuse this for other SELECT, SHOW, DESCRIBE or EXPLAIN queries.
*/
function getMySQLiResult(MySQLi $db, $sql)
{
$result = $db->query(isString($sql));
if (!($result instanceof mysqli_result)) {
throw new UnexpectedValueException("<p>MySQLi error no {$db->errno} : {$db->error}</p>");
}
return $result;
}
2）其次，创建一个函数来存放SQL并调用getmysqliresult（）。
/**
* Make sure you can get the data first.
* returns a mysqli_result object.
*/
function getInterviews(MySQLi $db)
{
$sql = "SELECT * FROM `interviews` WHERE `featured` = 1";
return getMySQLiResult($db, $sql);
}
3）生成一个表数据（
mysqli_result）单元格及其内容的函数。把你需要重复的所有html或者数据放在这里。/**
* Returns one database table record a table data cell.
*/
function buildCell(array $record)
{
return "<td>\n".
'<img src="' .$record['image']. '" alt="' .$record['title']. '">' ."\n".
'<h4>' .$record['title']. '</h4>' . "\n" .
'<hr>' . "\n" .
'<p class="description">' .$record['description']. '</p>' . "\n" .
'<div id="hovers">
<a href="#" class="button">
<span class="contentbut">Read More</span>
</a>
</div>' . "\n
</td>\n";
}
4）生成生成表行的函数。小心局部的排。：-）
首先，一个小助手函数。
/**
* Returns one <tr></tr> element. Helper.
*/
function makeTr($tds)
{
return "<tr>\n" .isString($tds). "\n</tr>";
}
第二，真正的交易。
function buildTableRow (array $tableRow)
{
return makeTr(buildCell($tableRow)) . "\n"; //Done!
}
/**
* Returns a string of multiple <tr></tr> elements,
* $maxRecords per row.
*/
function buildTableRows(array $tableRows, $numRecords, $maxPerRow)
{
$rows = []; // Holds finished groups of <tr>s
$row = ''; // Temporary variable for building row of <td>s
$numCells = 0; // Number of cells currently in a row of <td>s.
$numRows = (int)($numRecords / $maxPerRow); //Rows to make.
$numStragglers = $numRecords % $maxPerRow; // Extra <td>s, partialRow.
if ($numStragglers !== 0) { //Check if extra row is needed.
$numRows += 1;
}
foreach ($tableRows as $record)
{
$row .= buildCell($record);
++$numCells;
if ($numCells === $numRecords) { // Builds partial, last row, if needed.
$rows[] = makeTr($row);
break; // Done!
}
if ($numCells === $maxPerRow) { // Builds full row.
$rows[] = makeTr($row); // Save the row.
$numCells = 0; // Start cell counter over.
$row = ''; // Start a new row.
}
}
if(count($rows) !== $numRows) { //Verify all rows were created.
throw new RuntimeException("Rows (<tr>) for all records were not created!");
}
return implode("\n", $rows) . "\n"; //Return all rows as a string.
}
5）创建一个函数，在页面上弹出所需的HTML。在这种情况下，HTML中只需要一（1）个替换。
/**
* returns a set of HTML table rows (<tr></tr>) to fill a <tbody>.
* or, returns an alternative message.
*/
function drawInterviews(MySQLi $db, $maxPerRow) //PDO is recommened. Dependency injection.
{
$defaultMessage = "<tr>\n<td>There are no featured interviewers.<td>\n<\tr>\n";
try {
if (!is_int($maxPerRow) || $maxPerRow < 1) {
throw new RangeException("The number of interviews per row must be an integer equal to 1, or greater than 1.");
}
//Make a robust connection sequence, or pass it in like above.
//$db = new mysqli('host', 'user', 'password', 'dbname');
$result = getInterviews($db);
$numRecords = result->num_rows;
if ($numRecords < 1) {
return $defaultMessage;
}
if ($numRecords === 1) {
return buildTableRow($result->fetch_assoc());
}
return buildTableRows($result->fetch_all(), $numRecords, $maxPerRow);
} catch (Exception $e)
//Something went wrong with the query.
error_log($e->getMessage());
} finally { //PHP 5.5+
$result->free();
}
return $defaultMessage;
}
6）现在，有一个好的html
<td></td>结构。只需要一个插值。假设每行有三条记录…不管怎样，如果你想要一个表，把这个表“骨架”的副本放在
<table>里面，在页眉和页脚之间的某个地方（即html文档的main<td>）。<table>
<caption>Featured Interviewers</caption> <!-- Centers above table. -->
<thead>
<tr> <!-- If needed. -->
<th>Heading1</th> <!-- If needed. -->
<th>Heading2</th> <!-- If needed. -->
<th>Heading3</th> <!-- If needed. -->
</tr>
</thead>
<tfoot></tfoot> <!-- If needed. Yes, it goes after <thead>. -->
<tbody>
<!-- <div id="element1"></div> --> //What goes between here?
<!-- <div id="content1"> --> //What's this?
<?= drawInterviews($db, 3); ?> <!-- Dependency injection. -->
</tbody>
</table>
所有这些都可以变得更加模块化和可重用（甚至面向对象）。
更新：
基于你的Dropbox代码…
学院.php
1）最好的做法是创建一个名为
academytest.php的单独php文件，或是其他类似的文件。将除<body>和tbodyFiller.php将进入getInterviews()、drawInterviews()将进入academyLibray.php和isString()将进入library.php（以前称为getMySQLiResult()）之外的所有函数放入此文件。database.php的开头应该如下所示：<?php
// academytest.php
require '../../includes/library.php'; //For now, put generic helper functions here. Group them, later.
require_once '../../core/database.php'; //Formerly, init.php. Put getMySQLiResult() in here.
require '../../includes/academyLibrary.php'; //Put the two "interview" functions here.
$db = getMySQLi(); //Many things are dependent on this being here.
require '../../includes/navigation.php';
/***************** DELETE THESE LINES *****************/
//$sql = "SELECT * FROM interviews WHERE featured = 1";
//$featured = $db->query($sql);
/******************************************************/
在
init.php的页脚中，关闭与数据库的连接。<!-- ------FOOTER------ -->
<?php
include '../../includes/footer.php';
$db->close(); //Ensures $db is available to use in the footer, if necessary.
?>
library.php库
academytest.php的开头应该如下所示：<?php
// library.php
/**
* Returns a string, or
* throws an UnexpectedValueException, otherwise.
*/
function isString($string)
{
if (!is_string($string)) {
throw new UnexpectedValueException("$string must be a string data type.");
}
return $string;
}
我认为
academytest.php应该命名为library.php。您可以在空闲时学习使用带有错误检查的面向对象构造函数（使用init.php）序列。最终，你会想学习PDO。另外，制作一个单独的文件来保存您的凭据。现在，这比将它们硬编码到
database.php函数要好。dbcreds.php文件
<?php
// dbCreds.php
$host = ''; //IP or DNS name: string.
$username = ''; //Your account: string.
$passwd = ''; //The password: string.
$dbname = ''; //The database you want to work with: string.
//*************************************************************************
//$port = '3306'; //Un-comment and change only if you need a differnt TCP port.
//Also, you would need to add a $port as your last argument in new MySQLi(),
//in the getMySQLi() function.
数据库.php
<?php
// database.php
/**
* Returns a mysqli_result object, or throws an `UnexpectedValueException`.
* You can reuse this for other SELECT, SHOW, DESCRIBE or EXPLAIN queries.
*/
function getMySQLiResult(MySQLi $db, $sql)
{
$result = $db->query(isString($sql));
if (!($result instanceof mysqli_result)) {
throw new UnexpectedValueException("<p>MySQLi error no {$db->errno} : {$db->error}</p>");
}
return $result;
}
function getMySQLi() //This can be improved, but that's not the issue right now.
{
require_once 'dbCreds.php'; //Choose your own file name. Do not put in public directory.
$db = new mysqli($host, $username, $passwd, $dbname); //$port would be next.
if(!($db instanceof MySQLi)){
throw new UnexpectedValueException("A MySQLi object was not returned during your connection attempt.");
}
if(isset($db->connect_error)){
throw new UnexpectedValueException("The database connection was not established. {$db->connect_errno} : {$db->connect_error}");
}
return $db
} //Using the object form of MySQLi object has side benenfits.
学院图书馆.php
new的开头应该如下所示：<?php
// academyLibrary.php
require 'tbodyFiller.php'; //Put all but four functions in here.
function getInterviews(MySQLi $db)
{
$sql = "SELECT * FROM `interviews` WHERE `featured` = 1";
return getMySQLiResult($db, $sql);
}
/**
* Comments //etc...
*/
function drawInterviews(MySQLi $db, $maxPerRow)
{
//The code, etc ...
}
如果尚未在
getMySQLi()内部配置academyLibrary.php，请确保include_path和php.ini位于同一目录中。导航.php
我们将用面向对象的方法替换使用mysql的过程形式。这很简单，我们不需要改变太多。我现在不会替换您的循环或查询，但我的建议是不要把php循环和sql直接放在html中。找到一种使用函数或方法的方法，就像我在
academyLibrary.php中为表所做的那样。这时，你应该有足够的例子了。：-）重构
我花了一些时间重构这个文件。这是我最上面的。再次，您可能希望创建另一个php文件，比如
tbodyFiller.php，并将这些函数放入其中。在这种情况下，您可以用一行academytest.php替换下面看到的所有函数。当然，这种导入代码的方式可能取决于在navLibrary.php中配置require 'navLibrary.php';。<?php
// navigation.php
function getPqueryMainData(MySQLi $db)
{
$sql = "SELECT * FROM `mainmenu` WHERE `parent` = 0"; //pqueryMain
return getMySQLiResult($db, $sql);
}
function getPqueryData(MySQLi $db)
{
$sql = "SELECT * FROM `categories` WHERE `parent` = 0"; //pquery
return getMySQLiResult($db, $sql);
}
function getCquery1Data(MySQLi $db)
{
$sql = "SELECT * FROM `categories` WHERE `parent` = 1"; //cquery1
return getMySQLiResult($db, $sql);
}
function getCquery2Data(MySQLi $db, $int)
{
$sql = "SELECT * FROM `categories` WHERE `parent` = '$int'"; //cquery2
return getMySQLiResult($db, $sql);
}
//Consider doing at most 3 queries early on.
//Consider using better names for your variables.
//I get that 'p' means "primary", and 'c' means "child", but come on. :-)
$pqueryMain = getPqueryMainData($db);
$pquery = getPqueryData($db);
$cquery1 = getCquery1Data($db);
$cquery2 = null;
关于php - PHP:如何使用MySQLi在每个HTML表行中显示多个MySQL表记录，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/42471993/