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HomeBackend DevelopmentPHP Tutorial异常提示:Fatal error: Call to undefined function mysqli_num_row()

错误提示:Fatal error: Call to undefined function mysqli_num_row()
错误提示就如标题所示,网上也找了一圈,差不多都是说没有开启php_mysqli模块,我的wampserver环境本身已经开启,但是我还是去重新关闭在开启,结果都是一样,有一点很奇怪,网上一般都是在链接数据库的时候失败,但是我链接数据库没有提示失败,而是在使用mysqli_num_row时候出现错误

下面先上下我在查看phpinfo下mysqli下的开启情况
               mysqli
MysqlI Support enabled
Client API library version  mysqlnd 5.0.8-dev - 20102224 - $Id: 65fe78e70ce53d27a6cd578597722950e490b0d0 $
Active Persistent Links  0
Inactive Persistent Links  0
Active Links  0

Directive Local Value Master Value
mysqli.allow_local_infile On On
mysqli.allow_persistent On On
mysqli.default_host no value no value
mysqli.default_port 3306 3306
mysqli.default_pw no value no value
mysqli.default_socket no value no value
mysqli.default_user no value no value
mysqli.max_links Unlimited Unlimited
mysqli.max_persistent Unlimited Unlimited
mysqli.reconnect Off Off


下面是我的代码部分

<?php <br />require ('inc/config.php');<br>$page_title = '注册-CNode博客';<br>include ('inc/header.php');<br>if ($_SERVER['REQUEST_METHOD'] == 'POST') {<br>	require (MYSQL);<br>	$trimmed = array_map('trim', $_POST);<br>	$errors = array();<br>	if ($_POST['code'] != $_SESSION['code']) {<br>		$errors[] = '验证码不正确!';<br>	}<br>	if(empty($trimmed['username'])) {<br>		$errors[] = '用户名不能为空';<br>	} else {<br>		if (preg_match ('/^[A-Z \'.-]{5,20}$/i', $trimmed['username'])) {<br>			$un = mysqli_real_escape_string ($conn, $trimmed['username']);<br>		} else {<br>			$errors[] = '您的用户名格式不对';<br>		}<br>	}<br>	<br>	if(empty($trimmed['email'])) {<br>		$errors[] = '电子邮件地址不能为空';<br>	} else {<br>		if (filter_var($trimmed['email'], FILTER_VALIDATE_EMAIL)) {<br>			$e = mysqli_real_escape_string ($conn, $trimmed['email']);<br>		} else {<br>			$errors[] = '您的电子邮件地址格式不对';<br>		}<br>	}<br>	<br>	if(!empty($trimmed['password'])) {		<br>		if (preg_match ('/^\w{4,20}$/', $trimmed['password']) ) {<br>			if ($trimmed['password'] == $trimmed['notpassword']) {<br>				$p = mysqli_real_escape_string ($conn, $trimmed['password']);<br>			} else {<br>				$errors[] = '登录密码和确认密码不一致';<br>			}<br>		} else {<br>			$errors[] = '请输入有效的登录密码';<br>		}		<br>	} else {<br>		$errors[] = '登录密码不能为空';<br>	}	<br>	if(empty($trimmed['notpassword'])) {<br>		$errors[] = '确认密码不能为空';<br>	}<br>	<br>	if (empty($errors)) {<br>		// 确定电子邮件是否被使用<br>		$q = "SELECT user_id FROM users WHERE email='$e'";<br>		$r = mysqli_query ($conn, $q) or trigger_error("Query: $q\n<br>MySQL Error: " . mysqli_error($conn));<br>		if (mysqli_num_row($r) == 0) { // 如果查询验证电子邮件地址未被使用,则注册用户<br>			$a = md5(uniqid(rand(), true)); // 创建一个激活码(创建一个长度正好为32个字符的字符串)<br>			$q = "INSERT INTO users (username, email, password, active, registration_date) VALUES ('$un', '$e', SHA1('$p'), '$a', NOW() )";<br>			$r = mysqli_query ($conn, $q) or trigger_error("Query: $q\n<br>MySQL Error: " . mysqli_error($conn));	<br>			if (mysqli_affected_rows($conn) == 1) {<br>				$body = "感谢您的注册,激活您的帐户,请点击这里:\n\n";<br>				$body .= BASE_URL . 'activate.php?x=' . urlencode($e) . "&y=$a";<br>				mail($trimmed['email'], '确认注册', $body, 'From: [email protected]');<br>				echo '<h3 id="感谢您的注册-一封确认邮件已经发送到您的邮箱-请在该电子邮件中单击链接-以激活您的帐户">感谢您的注册!一封确认邮件已经发送到您的邮箱。请在该电子邮件中单击链接,以激活您的帐户。</h3>';<br>				exit();<br>		 	} else { <br>				echo '<p>用户注册失败,为此我们表示抱歉,请在注册一次</p>';<br>			}		<br>		} else { // 查询验证出来的电子邮件地址已经被注册<br>			echo '<p>电子邮件地址已经被注册</p>';<br>		}<br>	} else {<br>		foreach ($errors as $msg) { // Print each error.<br>			echo " - $msg<br>\n";<br>		}<br>	}<br>	mysqli_close($conn);<br>}<br>?><br><br><div>
<br>	<div>
<a>主页</a> > 注册</div>
<br>	<div>
<br>    <form>
<br>		<p><br>		  <label>用户名:</label><input>" /><br>		  <span>限5~20个字符,可用中文、英文、数字及“_”、“-”组成</span><br>		</p>
<br>        <p><br>          <label>电子邮件:</label><input>" /><br>          <span>请填写您的常用邮箱,它是您激活帐号和找回密码的凭证!</span></p>
<div class="clear">
                 
              
              
        
            </div>
</form>
</div>
</div>
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