PHP MySQL函数数组没有输出
在私有消息系统的后端文件中,在函数fetch_conversation_messages结尾的while语句中声明了一个数组的值。但是,显示的数组是空白的(我用于调试的echos和print_r除外) 我对这个论坛非常陌生,PHP和MySQL,所以请帮助我 先谢谢你PHP MySQL函数数组没有输出,php,mysql,sql,function,output,Php,Mysql,Sql,Function,Output,在私有消息系统的后端文件中,在函数fetch_conversation_messages结尾的while语句中声明了一个数组的值。但是,显示的数组是空白的(我用于调试的echos和print_r除外) 我对这个论坛非常陌生,PHP和MySQL,所以请帮助我 先谢谢你 // Fetches all of the messages in the given converstion. function fetch_conversation_messages($conversation_id){
// Fetches all of the messages in the given converstion.
function fetch_conversation_messages($conversation_id){
$conversation_id = (int)$conversation_id;
$sql = "SELECT
`conversations_messages`.`message_date`,
`conversations_messages`.`message_text`,
`users`.`user_name`
FROM `conversations_messages`
INNER JOIN `users` ON `conversations_messages`.`user_id` = `users`.`user_id`
WHERE `conversations_messages`.`conversation_id` = {$conversation_id}
ORDER BY `conversations_messages`.`message_date` DESC";
$result = mysql_query($sql);
var_dump($result);
$messages = array();
while (($row = mysql_fetch_assoc($result)) !== false){
$messages[] = array(
'date' => $row['message_date'],
'unread' => $row['message_unread'],
'text' => $row['message_text'],
'user_name' => $row['user_name'],
);
echo mysql_num_rows($result);
var_dump($row);
}
echo count($messages);}
此外,view_conversation.page.inc.php中存在一个foreach错误(写在下面作为对第一个答案的注释),即此页面:
<?php
$errors = array();
$valid_conversation = (isset($_GET['conversation_id']) && validate_conversation_id($_GET['conversation_id']));
if ($valid_conversation === false){
$errors[] = 'Invalid Conversation ID.';
}
if (isset($_POST['message'])){
if (empty($_POST['message'])){
$errors[] = 'You must enter a message.';
}
if (empty($errors)){
add_conversation_message($_GET['conversation_id'], $_POST['message']);
}
}
if (empty($errors) === false){
foreach ($errors as $error){
}
}
echo $error;
if ($valid_conversation){
/*if (isset($_POST['message'])){
update_conversation_last_view($_GET['conversation_id']);*/
$messages = fetch_conversation_messages($_GET['conversation_id']);
print_r($messages);
/*}else{
$messages = fetch_conversation_messages($_GET['conversation_id']);
update_conversation_last_view($_GET['conversation_id']);
}*/
}
?>
<a href="index.php?page=inbox">Inbox</a>
<a href="index.php?page=logout">Logout</a>
<form action="" method="post">
<p><textarea name="message" rows="10" cols="110"></textarea></p>
<p><input type="submit" value="Add Message" /></p>
</form>
<?php
foreach ($messages as $message){
?>
<?php if ($message['unread']) echo 'unread'; ?>
<p class="name">Username: <?php echo $message['user_name']; ?></p>
<p class="text">Date: <?php echo date('d/m/Y H:i:s', $message['date']); ?></p>
<p>Message: <?php echo $message['text']; ?></p>
<?php
}
?>
用户名:
日期:
信息:
您得到了什么?您希望得到什么?您是否尝试过手动运行查询以确保确实有结果?我的意思是,在phpMyAdmin或similarI中,我已经尝试过了,但是它依赖于太多的变量,所以很难正确测试。我想得到类型为(mysql结果)0的资源(16),我希望得到一个包含“日期”、“未读”、“文本”、“用户名”的数组