警告：mysqli_num_rows() 期望参数 1 为 mysqli_result，布尔值在 /home/digibeem/public_html/forgot_pass.php 第 55 行 [
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【中文标题】警告：mysqli_num_rows() 期望参数 1 为 mysqli_result，布尔值在 /home/digibeem/public_html/forgot_pass.php 第 55 行 [重复]【英文标题】：Warning: mysqli_num_rows() expects parameter 1 to be mysqli_result, boolean given in /home/digibeem/public_html/forgot_pass.php on line 55 [duplicate] 【发布时间】：2013-06-02 10:46:15 【问题描述】：这是我的编码：forgot_pass.php
<?php
include_once("php_includes/check_login_status.php");
// If user is already logged in, header that weenis away
if($user_ok == true)
header("location: user.php?u=".$_SESSION["username"]);
exit();
?><?php
// AJAX CALLS THIS CODE TO EXECUTE
if(isset($_POST["e"]))
$e = mysqli_real_escape_string($db_conx, $_POST['e']);
$sql = "SELECT id, username FROM users WHERE email='$e' AND activated='1' LIMIT 1";
$query = mysqli_query($db_conx, $sql);
$numrows = mysqli_num_rows($query);
if($numrows > 0)
while($row = mysqli_fetch_array($query, MYSQLI_ASSOC))
$id = $row["id"];
$u = $row["username"];
$emailcut = substr($e, 0, 4);
$randNum = rand(10000,99999);
$tempPass = "$emailcut$randNum";
$hashTempPass = md5($tempPass);
$sql = "UPDATE useroptions SET temp_pass='$hashTempPass' WHERE username='$u' LIMIT 1";
$query = mysqli_query($db_conx, $sql);
$to = "$e";
$from = "auto_responder@digibeem.com";
$headers ="From: $from\n";
$headers .= "MIME-Version: 1.0\n";
$headers .= "Content-type: text/html; charset=iso-8859-1 \n";
$subject ="DigiBeem Account Temporary Password Request";
$msg = '<h2>Hello '.$u.'</h2><p>This is an automated message from digibeem. If you did not recently initiate the Forgot Password process, please disregard this email.</p><p>You indicated that you forgot your login password. We can generate a temporary password for you to log in with, then once logged in you can change your password to anything you like.</p><p>After you click the link below your password to login will be:<br /><b>'.$tempPass.'</b></p><p><a href="http://www.digibeem.com/forgot_pass.php?u='.$u.'&p='.$hashTempPass.'">Click here now to apply the temporary password shown below to your account</a></p><p>If you do not click the link in this email, no changes will be made to your account. In order to set your login password to the temporary password you must click the link above.</p>';
if(mail($to,$subject,$msg,$headers))
echo "success";
exit();
else
echo "email_send_failed";
exit();
else
echo "no_exist";
exit();
?><?php
// EMAIL LINK CLICK CALLS THIS CODE TO EXECUTE
if(isset($_GET['u']) && isset($_GET['p']))
$u = preg_replace('#[^a-z0-9]#i', '', $_GET['u']);
$temppasshash = preg_replace('#[^a-z0-9]#i', '', $_GET['p']);
if(strlen($temppasshash) < 10)
exit();
$sql = "SELECT id FROM useroptions WHERE username='$u' AND temp_pass='$temppasshash' LIMIT 1";
$query = mysqli_query($db_conx, $sql);
$numrows = mysqli_num_rows($query);
if($numrows == 0)
header("location: message.php?msg=There is no match for that username with that temporary password in the system. We cannot proceed.");
exit();
else
$row = mysqli_fetch_row($query);
$id = $row[0];
$sql = "UPDATE users SET password='$temppasshash' WHERE id='$id' AND username='$u' LIMIT 1";
$query = mysqli_query($db_conx, $sql);
$sql = "UPDATE useroptions SET temp_pass='' WHERE username='$u' LIMIT 1";
$query = mysqli_query($db_conx, $sql);
header("location: login.php");
exit();
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Password Recovery</title>
<!-- CSS -->
<link rel="stylesheet" href="css/style.css" type="text/css" media="screen" />
<!--[if IE 6]>
<link rel="stylesheet" type="text/css" media="screen" href="css/ie-hacks.css" />
<script type="text/javascript" src="js/DD_belatedPNG.js"></script>
<script>
/* EXAMPLE */
DD_belatedPNG.fix('*');
</script>
<![endif]-->
<!--[if IE 7]>
<link rel="stylesheet" href="css/ie7-hacks.css" type="text/css" media="screen" />
<![endif]-->
<!--[if IE 8]>
<link rel="stylesheet" href="css/ie8-hacks.css" type="text/css" media="screen" />
<![endif]-->
<!-- ENDS CSS -->
<!-- prettyPhoto -->
<link rel="stylesheet" href="js/prettyPhoto/css/prettyPhoto.css" type="text/css" media="screen" />
<!-- ENDS prettyPhoto -->
<!-- JS -->
<script type="text/javascript" src="js/jquery_1.4.2.js"></script>
<script type="text/javascript" src="js/jqueryui.js"></script>
<script type="text/javascript" src="js/easing.js"></script>
<script type="text/javascript" src="js/jquery.cycle.all.js"></script>
<script type="text/javascript" src="js/tooltip/jquery.tools.min.js"></script>
<script type="text/javascript" src="js/filterable.pack.js"></script>
<script type="text/javascript" src="js/prettyPhoto/js/jquery.prettyPhoto.js"></script>
<script type="text/javascript" src="js/chirp.js"></script>
<script type="text/javascript" src="js/jquery.tabs/jquery.tabs.pack.js"></script>
<script type="text/javascript" src="js/custom.js"></script>
<!-- ENDS JS -->
<!-- Cufon -->
<script src="js/cufon-yui.js" type="text/javascript"></script>
<script src="js/fonts/bebas-neue_400.font.js" type="text/javascript"></script>
<!-- /Cufon -->
<!-- superfish -->
<link rel="stylesheet" type="text/css" media="screen" href="css/superfish-custom.css" />
<script type="text/javascript" src="js/superfish-1.4.8/js/hoverIntent.js"></script>
<script type="text/javascript" src="js/superfish-1.4.8/js/superfish.js"></script>
<!-- ENDS superfish -->
<!-- tabs -->
<link rel="stylesheet" href="css/jquery.tabs.css" type="text/css" media="print, projection, screen" />
<!-- Additional IE/Win specific style sheet (Conditional Comments) -->
<!--[if lte IE 7]>
<link rel="stylesheet" href="css/jquery.tabs-ie.css" type="text/css" media="projection, screen">
<![endif]-->
<!-- ENDS tabs -->
<style type="text/css">
#forgotpassform
margin-top:24px;
#forgotpassform > div
margin-top: 12px;
#forgotpassform > input
width: 250px;
padding: 3px;
background: #F3F9DD;
#forgotpassbtn
font-size:15px;
padding: 10px;
</style>
<script src="js/main.js"></script>
<script src="js/ajax.js"></script>
<script>
function forgotpass()
var e = _("email").value;
if(e == "")
_("status").innerHTML = "Type in your email address";
else
_("forgotpassbtn").style.display = "none";
_("status").innerHTML = 'please wait ...';
var ajax = ajaxObj("POST", "forgot_pass.php");
ajax.onreadystatechange = function()
if(ajaxReturn(ajax) == true)
var response = ajax.responseText;
if(response == "success")
_("forgotpassform").innerHTML = '<h3>Step 2. Check your email inbox in a few minutes</h3><p>You can close this window or tab if you like.</p>';
else if (response == "no_exist")
_("status").innerHTML = "Sorry that email address is not in our system";
else if(response == "email_send_failed")
_("status").innerHTML = "Mail function failed to execute";
else
_("status").innerHTML = "An unknown error occurred";
ajax.send("e="+e);
</script>
</head>
<body>
<!-- HEADER --><?php include 'header.php' ?><!-- ENDS HEADER -->
<!-- MAIN -->
<div id="main">
<!-- wrapper -->
<div class="wrapper">
<!-- content -->
<div class="content">
<div class="title-holder">
<span class="title"><h2>Password Recovery Corner...</h2></span>
<span class="subtitle"><b></b></span> </div>
<!-- POSTS -->
<div align="center">
<h3>Generate a temorary log in password</h3>
<form id="forgotpassform" onsubmit="return false;">
<div>Step 1: Enter Your Email Address</div>
<input id="email" type="text" onfocus="_('status').innerHTML='';" maxlength="88">
<br /><br />
<button id="forgotpassbtn" onclick="forgotpass()">Generate Temporary Log In Password</button>
<p id="status"></p>
</form>
</div>
<!-- ENDS POSTS -->
<!-- sidebar -->
<!-- ENDS sidebar -->
</div>
<!-- ENDS content-blog -->
<div class="shadow-divider"></div>
</div>
<!-- ENDS main-wrapper -->
</div>
<!-- ENDS MAIN -->
<?php include 'footer_social.php' ?>
<!-- start cufon -->
<script type="text/javascript"> Cufon.now(); </script>
<!-- ENDS start cufon -->
</body>
</html>
上面的编码是忘记密码系统的编码，我正在尝试但失败了。这是行号。 55，请告诉我如何使这个工作，因为我真的很困扰这个问题，请拜托，如果可能的话，请你建议我进行更改，包括任一行号。或行中的一些文本。
$numrows = mysqli_num_rows($query);
【问题讨论】：
学习的正确答案：Mysqli update throwing Call to a member function bind_param() error 实际上我对他的代码感到困惑，我需要上面代码的答案，它似乎与您提供的链接完全不同。我是 php 新手，这就是为什么我不知道如何在上面的代码中解决这个问题。 你能DESCRIBE useroptions吗？
【参考方案1】：
这意味着您的查询失败。使用 mysqli_error 并回显您的查询以查看问题。 随处可见
$query = mysqli_query($db_conx, $sql);
你应该添加：
$query = mysqli_query($db_conx, $sql) or trigger_error("Query Failed! SQL: $sql - Error: ".mysqli_error(db_conx), E_USER_ERROR);
顺便说一句，你应该考虑切换到OOP mysqli，那么你不必每次都使用连接变量。
【讨论】：
查询失败！ SQL: SELECT id FROM useroptions WHERE username='Nishchey' AND temp_pass='c83a525311b0a36f96c45c2afa69fd36' LIMIT 1 - Error: in /home/digibeem/public_html/forgot_pass.php on line 56 这只是我创建的用于检查 forgot_pass.php 的试用帐户 @user2435613 db_conx -> $db_conx 致命错误：查询失败！ SQL: SELECT id FROM useroptions WHERE username='Nishchey' AND temp_pass='c83a525311b0a36f96c45c2afa69fd36' LIMIT 1 - Error: Unknown column 'temp_pass' in 'where clause' in /home/digibeem/public_html/forgot_pass.php on line 56 @user2435613 现在该阅读此错误消息了。很清楚以上是关于警告：mysqli_num_rows() 期望参数 1 为 mysqli_result，布尔值在 /home/digibeem/public_html/forgot_pass.php 第 55 行 [的主要内容，如果未能解决你的问题，请参考以下文章
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