mysqli 查询结果显示所有行

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，这很好，因为我可以回显$row['title']，但如果有很多结果，我如何让它循环并打印每一行？

我确信这真的很简单，但我只是不确定我需要在 Google 中搜索什么。

我正在寻找与此等效的 mysqli：

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

Answer 1

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();

错误处理：如果出现致命错误，脚本将终止并显示错误消息。

// ini_set('display_errors',1); // Uncomment to show errors to the end user.
mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);
$db = new mysqli('localhost','user','password','database');
$resource = $db->query('SELECT field FROM table WHERE 1');
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 2

你可以简单地使用foreach循环

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

如果您希望将 mysqli 代码和 HTML 分开，那么最好将所有内容提取到一个数组中并稍后循环。

$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>

Answer 3

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_* 函数都有对应的mysqli_* 函数。

Answer 4

用途：

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

查看这里的关联数组示例（也应与 fetch_array() 版本对应）：

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