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HomeBackend DevelopmentPHP Tutorial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

<?phprequire ('inc/config.php');$page_title = '注册-CNode博客';include ('inc/header.php');if ($_SERVER['REQUEST_METHOD'] == 'POST') {	require (MYSQL);	$trimmed = array_map('trim', $_POST);	$errors = array();	if ($_POST['code'] != $_SESSION['code']) {		$errors[] = '验证码不正确!';	}	if(empty($trimmed['username'])) {		$errors[] = '用户名不能为空';	} else {		if (preg_match ('/^[A-Z \'.-]{5,20}$/i', $trimmed['username'])) {			$un = mysqli_real_escape_string ($conn, $trimmed['username']);		} else {			$errors[] = '您的用户名格式不对';		}	}		if(empty($trimmed['email'])) {		$errors[] = '电子邮件地址不能为空';	} else {		if (filter_var($trimmed['email'], FILTER_VALIDATE_EMAIL)) {			$e = mysqli_real_escape_string ($conn, $trimmed['email']);		} else {			$errors[] = '您的电子邮件地址格式不对';		}	}		if(!empty($trimmed['password'])) {				if (preg_match ('/^\w{4,20}$/', $trimmed['password']) ) {			if ($trimmed['password'] == $trimmed['notpassword']) {				$p = mysqli_real_escape_string ($conn, $trimmed['password']);			} else {				$errors[] = '登录密码和确认密码不一致';			}		} else {			$errors[] = '请输入有效的登录密码';		}			} else {		$errors[] = '登录密码不能为空';	}		if(empty($trimmed['notpassword'])) {		$errors[] = '确认密码不能为空';	}		if (empty($errors)) {		// 确定电子邮件是否被使用		$q = "SELECT user_id FROM users WHERE email='$e'";		$r = mysqli_query ($conn, $q) or trigger_error("Query: $q\n<br />MySQL Error: " . mysqli_error($conn));		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			$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)			$q = "INSERT INTO users (username, email, password, active, registration_date) VALUES ('$un', '$e', SHA1('$p'), '$a', NOW() )";			$r = mysqli_query ($conn, $q) or trigger_error("Query: $q\n<br />MySQL Error: " . mysqli_error($conn));				if (mysqli_affected_rows($conn) == 1) {				$body = "感谢您的注册,激活您的帐户,请点击这里:\n\n";				$body .= BASE_URL . 'activate.php?x=' . urlencode($e) . "&y=$a";				mail($trimmed['email'], '确认注册', $body, 'From: 414412984@qq.com');				echo '<h3 id="感谢您的注册-一封确认邮件已经发送到您的邮箱-请在该电子邮件中单击链接-以激活您的帐户">感谢您的注册!一封确认邮件已经发送到您的邮箱。请在该电子邮件中单击链接,以激活您的帐户。</h3>';				exit();		 	} else { 				echo '<p class="error">用户注册失败,为此我们表示抱歉,请在注册一次</p>';			}				} else { // 查询验证出来的电子邮件地址已经被注册			echo '<p class="error">电子邮件地址已经被注册</p>';		}	} else {		foreach ($errors as $msg) { // Print each error.			echo " - $msg<br />\n";		}	}	mysqli_close($conn);}?><div class="wrap login">	<div class="path"><a href="#">主页</a> > 注册</div>	<div class="info">    <form method="post" name="register" action="">		<p>		  <label for="username">用户名:</label><input type="text" name="username" id="username" class="text" value="<?php if (isset($trimmed['username'])) echo $trimmed['username']; ?>" />		  <span>限5~20个字符,可用中文、英文、数字及“_”、“-”组成</span>		</p>        <p>          <label for="email">电子邮件:</label><input type="text" name="email" id="email" class="text" value="<?php if (isset($trimmed['email'])) echo $trimmed['email']; ?>" />          <span>请填写您的常用邮箱,它是您激活帐号和找回密码的凭证!</span>        </p>        		<p>		  <label for="password">登录密码:</label><input type="password" name="password" id="password" class="text" value="<?php if (isset($trimmed['password'])) echo $trimmed['password']; ?>" />		  <span>密码由4-20位字母、数字组成</span>		</p>		<p>          <label for="notpassword">确认密码:</label><input type="password" name="notpassword" id="notpassword" class="text" value="<?php if (isset($trimmed['notpassword'])) echo $trimmed['notpassword']; ?>" />          <span>请再次输入密码</span>        </p>				<p>		  <label for="yzm">验证码:</label><input type="text" name="code" id="yzm" class="text1" />		  <img  src="/static/imghwm/default1.png"  data-src="code.php"  class="lazy"   id="code" / alt="错误提示:Fatal error: Call to undefined function mysqli_num_row()" >          <span>看不清,请重新点击验证码(注意大小写)</span>		</p>		<div class="submit">		   <input type="submit" name="submit" class="btn-1" value="立即注册" />		</div>	</form>	</div>	</div>	<?phpinclude ('inc/footer.php');?>


回复讨论(解决方案)

print_r(get_extension_funcs('mysqli'));

你自己看看有没有
Array
(
    [0] => mysqli_affected_rows
    [1] => mysqli_autocommit
    [2] => mysqli_change_user
    [3] => mysqli_character_set_name
    [4] => mysqli_close
    [5] => mysqli_commit
    [6] => mysqli_connect
    [7] => mysqli_connect_errno
    [8] => mysqli_connect_error
    [9] => mysqli_data_seek
    [10] => mysqli_dump_debug_info
    [11] => mysqli_debug
    [12] => mysqli_errno
    [13] => mysqli_error
    [14] => mysqli_error_list
    [15] => mysqli_stmt_execute
    [16] => mysqli_execute
    [17] => mysqli_fetch_field
    [18] => mysqli_fetch_fields
    [19] => mysqli_fetch_field_direct
    [20] => mysqli_fetch_lengths
    [21] => mysqli_fetch_all
    [22] => mysqli_fetch_array
    [23] => mysqli_fetch_assoc
    [24] => mysqli_fetch_object
    [25] => mysqli_fetch_row
    [26] => mysqli_field_count
    [27] => mysqli_field_seek
    [28] => mysqli_field_tell
    [29] => mysqli_free_result
    [30] => mysqli_get_connection_stats
    [31] => mysqli_get_client_stats
    [32] => mysqli_get_charset
    [33] => mysqli_get_client_info
    [34] => mysqli_get_client_version
    [35] => mysqli_get_host_info
    [36] => mysqli_get_proto_info
    [37] => mysqli_get_server_info
    [38] => mysqli_get_server_version
    [39] => mysqli_get_warnings
    [40] => mysqli_init
    [41] => mysqli_info
    [42] => mysqli_insert_id
    [43] => mysqli_kill
    [44] => mysqli_more_results
    [45] => mysqli_multi_query
    [46] => mysqli_next_result
    [47] => mysqli_num_fields
    [48] =>  mysqli_num_rows 这个是你要的吗?但你写错了
    [49] => mysqli_options
    [50] => mysqli_ping
    [51] => mysqli_poll
    [52] => mysqli_prepare
    [53] => mysqli_report
    [54] => mysqli_query
    [55] => mysqli_real_connect
    [56] => mysqli_real_escape_string
    [57] => mysqli_real_query
    [58] => mysqli_reap_async_query
    [59] => mysqli_rollback
    [60] => mysqli_select_db
    [61] => mysqli_set_charset
    [62] => mysqli_stmt_affected_rows
    [63] => mysqli_stmt_attr_get
    [64] => mysqli_stmt_attr_set
    [65] => mysqli_stmt_bind_param
    [66] => mysqli_stmt_bind_result
    [67] => mysqli_stmt_close
    [68] => mysqli_stmt_data_seek
    [69] => mysqli_stmt_errno
    [70] => mysqli_stmt_error
    [71] => mysqli_stmt_error_list
    [72] => mysqli_stmt_fetch
    [73] => mysqli_stmt_field_count
    [74] => mysqli_stmt_free_result
    [75] => mysqli_stmt_get_result
    [76] => mysqli_stmt_get_warnings
    [77] => mysqli_stmt_init
    [78] => mysqli_stmt_insert_id
    [79] => mysqli_stmt_more_results
    [80] => mysqli_stmt_next_result
    [81] => mysqli_stmt_num_rows
    [82] => mysqli_stmt_param_count
    [83] => mysqli_stmt_prepare
    [84] => mysqli_stmt_reset
    [85] => mysqli_stmt_result_metadata
    [86] => mysqli_stmt_send_long_data
    [87] => mysqli_stmt_store_result
    [88] => mysqli_stmt_sqlstate
    [89] => mysqli_sqlstate
    [90] => mysqli_ssl_set
    [91] => mysqli_stat
    [92] => mysqli_store_result
    [93] => mysqli_thread_id
    [94] => mysqli_thread_safe
    [95] => mysqli_use_result
    [96] => mysqli_warning_count
    [97] => mysqli_refresh
    [98] => mysqli_escape_string
    [99] => mysqli_set_opt
)

真是和你说的一样,太粗心了,你给的方法很直观,谢谢

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