如何用PHP检查MySQL中是否已存在ip?

时间:2014-06-17 16:09:36

标签: php mysql ip

这是我的代码,但它不起作用;怎么了?

$ip = $_SERVER["REMOTE_ADDR"];
$con=mysqli_connect("DBHOST","DBUSER","DBPASS","DBNAME");
$check= 'SELECT * FROM ip WHERE ip = '.$_SERVER["REMOTE_ADDR"];
$rs = $con->query($check);
$data = mysqli_fetch_array($rs, MYSQLI_NUM);
$row_cnt = mysqli_num_rows($rs);
if( $row_cnt > 0 ) echo $row_cnt.' Records found';

2 个答案:

答案 0 :(得分:0)

ip不是数字,它是文本(或varchar)。这就是你必须使用的原因:

$ check =“SELECT * FROM ip WHERE ip ='{$ _SERVER [”REMOTE_ADDR“]}'”;

答案 1 :(得分:0)

我认为,如果您只需要获取计数,请使用COUNT()

$sql = "SELECT COUNT(*) FROM ip WHERE ip = '".$_SERVER["REMOTE_ADDR"]."'";