当表有数据时，PHP MySQL 查询返回零结果

Question

当表有 10 行时，我的 PHP 查询返回零结果。实际显示的是部分PHP表格格式化代码。

实际输出:

0) { // output data of each row while($row = mysql_fetch_assoc($result)) { echo "in: " . $row["in"]. " - Name: " . $row["Name"]. " - Email: " . $row["Email"]. "
"; } } else { echo "0 re
sults"; } mysql_close($conn);? 

HTML/PHP 代码:

<div class="about-text">

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

// Create connection
$conn = mysql_connect($servername, $username, $password, $dbname);
// Check connection
if (!$conn) {
    die("Connection failed: " . mysql_connect_error());
}

$sql = "SELECT * FROM tablename";
$result = mysql_query($conn, $sql);

if (mysql_num_rows($result) > 0) {
    // output data of each row
    while($row = mysql_fetch_assoc($result)) {
        echo "in: " . $row["in"]. " - Name: " . $row["Name"]. " - Email: " . $row["Email"]. "<br>";
    }
} else {
    echo "0 results";
}

mysql_close($conn);
?>

</div>

Answer 1

http://php.net/manual/en/function.mysql-query.php

替换

$result = mysql_query($conn, $sql);

与

$result = mysql_query($sql, $conn);