Question

如何通过php回复或打印出select语句的结果？

<?php
$username = "root";
$password = "root";
$hostname = "localhost";

//connection to the database
$dbhandle = mysql_connect($hostname, $username, $password)
or die("Unable to connect to MySQL");
echo "Connected to MySQL<br>";
?>

<?php

$query="SELECT * FROM mydb.product";
$result=mysql_query($query);
echo "$result";
echo $result;
?>

我现在已经走了这么远，但它仍然没有回报。问题出在我的mysql表中吗？或者它落在其他地方

    <?php
$username = "root";
$password = "root";
$hostname = "localhost";

//connection to the database
$dbhandle = mysql_connect($hostname, $username, $password)
or die("Unable to connect to MySQL");
echo "Connected to MySQL<br>";

$sth = $db->prepare("SELECT * FROM mydb.test;");
$sth->execute();

$result = $sth->fetchAll();
?>

<h1> Im here</h1>
<?php

foreach ($result as $row) {
    echo "<tr>";
    echo "<td>{$row['name']}</td>";
    echo "<td>" . $row['email'] . "</td>";
    echo "</tr>";
}

?>

<h1> Im still here</h1>

感谢所有帮助

Answer 1

您需要查看结果。如果每行中有3列，那么您的代码将如下所示：

for($i=0;$i<mysql_num_rows($result);$i++) {
    $row_array=mysql_fetch_row($result);
    echo($row_array[0]." ".$row_array[1]." ".$row_array[2]."<br />");
}

Answer 2

正如评论中所建议的那样，您必须遍历获取的结果：

$query="SELECT * FROM mydb.product";
$result=mysql_query($query);

// Add these lines:
while ($row = mysql_fetch_assoc($result)) {
  var_dump($row);
  // each item from the row could be used like this:
  // echo $row['field'];
}

可在此处找到更多信息：http://php.net/manual/en/function.mysql-query.php

请注意，mysql_query已被删除，您应该考虑切换到mysqli（http://php.net/manual/en/book.mysqli.php）或PDO（http://php.net/manual/en/ref.pdo-mysql.php）

MySQL / PHP连接ok，sql语句不起作用

2 个答案: