Question

我有以下代码：

include $_SERVER['DOCUMENT_ROOT'].'/include/conn.php'; 

$query = "SELECT title FROM news_event";
$result = $mysqli->query($query);
$row = $result->fetch_array(MYSQLI_BOTH);
$row_cnt = $result->num_rows;
$result->free();
$mysqli->close();

如果只有一个结果，我可以回复$ row [＆＃39; title＆＃39;]，这很好，但如果有很多结果，我如何让它循环并打印每一行？

我确定这很简单，但我不确定我需要在谷歌搜索什么。

我正在寻找与此相当的mysqli：

while($row = mysql_fetch_array($result))
  {
  echo $row['FirstName'] . " " . $row['LastName'];
  echo "<br />";
  }

Answer 1

只需将其替换为mysqli_fetch_array或mysqli_result::fetch_array：）

while($row = $result->fetch_array())
  {
  echo $row['FirstName'] . " " . $row['LastName'];
  echo "<br />";
  }

几乎所有mysql_*函数都有相应的mysqli_*函数..

Answer 2

简单的mysqli解决方案：

$db = new mysqli('localhost','user','password','database');
$resource = $db->query('SELECT * FROM table WHERE 1');
while ( $rows = $resource->fetch_assoc() ) {
    print_r($rows);//echo "{$row['field']}";
}
$resource->free();
$db->close();

使用错误处理：如果发生致命错误，脚本将以错误消息终止。

// ini_set('display_errors',1); // Uncomment to show errors to the end user.
if ( $db->connect_errno ) die("Database Connection Failed: ".$db->connect_error);
$db = new mysqli('localhost','user','password','database');
$resource = $db->query('SELECT field FROM table WHERE 1');
if ( !$resource ) die('Database Error: '.$db->error);
while ( $row = $resource->fetch_assoc() ) {
    echo "{$row['field']}";
}
$resource->free();
$db->close();

使用迭代器：PHP 5.4添加了支持

$db = new mysqli('localhost','user','password','database');
foreach ( $db->query('SELECT * FROM table') as $row ) {
    print_r($row);//echo "{$row['field']}";
}
$db->close();

获取单个记录：此代码不需要循环。

$db = new mysqli('localhost','user','password','database');
$resource = $db->query('SELECT field FROM table');
$row = $resource->fetch_assoc();
echo "{$row['field']}";
$resource->free();
$db->close();

Answer 3

使用：

while ($row = $result->fetch_array(MYSQLI_BOTH)) {
    // Look inside $row here, do what you want with it.
}

在这里查看关联数组示例（也应该与fetch_array（）版本对应）：

http://php.net/manual/en/mysqli-result.fetch-assoc.php

Answer 4

您可以简单地使用foreach

循环

$query = "SELECT title FROM news_event";
$result = $mysqli->query($query);
foreach($result as $row) {
    echo $row['FirstName'] . " " . $row['LastName'];
    echo "<br />";
}

如果您想将mysqli代码和HTML分开，那么最好将它们全部提取到一个数组中并在以后循环。

$query = "SELECT title FROM news_event";
$result = $mysqli->query($query);
$news_events = $result->fetch_all(MYSQLI_ASSOC);

// Later in HTML:    

<div>
<?php foreach($news_events as $row): ?>
    <p><?= $row['FirstName'] ?> <?= $row['LastName'] ?></p>
<?php endforeach ?>
</div>

mysqli查询结果显示所有行

4 个答案: