Question

我正在尝试搜索关键字

的字段名字和姓氏

$q1 = strtolower($_GET["q"]);
$q=str_replace(" ","%",$q1);
$sql = "select DISTINCT users.*, user_id FROM users WHERE $email_filter 
firstname LIKE '%$q%' OR lastname LIKE '%$q%' ORDER BY lastname";
$rsd = mysql_query($sql);
while($rs = mysql_fetch_array($rsd)) { echo $results }

这就是我到目前为止所遇到的问题，问题是如果你用John Doe作为一个例子，一旦你输入John就会找到它，它会找到它，但是john doe ...没有结果

Answer 1

像

这样的东西

SELECT * FROM users where CONCAT(firstname, ' ', lastname) like '%$q%'

或

SELECT * FROM users where CONCAT_WS(' ', firstname, lastname) like '%$q%'

如果需要倒车，请尝试以下方法：

SELECT * FROM users where CONCAT_WS(' ', firstname, lastname) like '%$q%'
                       or CONCAT_WS(' ', lastname, firstname) like '%$q%'

（即，如果搜索“A B”应该返回“A B”以及“B A”）

Answer 2

我建议您绑定变量。否则你会接受sql注射。

$stmt = $mysqli->prepare("select * from users where firstname like ? AND lastname like ?");
$stmt->bind_param('ss', $firstname,$lastname);

Answer 3

您必须拆分查询字符串并搜索每个字词

$query_terms = explode(" ", $q1);
$conditions = ''
foreach($query_terms as $term){
    $conditions = $conditions.' firstname LIKE "%'.$term.'%" OR lastname LIKE "%'.$term.'%"';
}

$sql = "select DISTINCT users.*, user_id FROM users WHERE $email_filter $conditions ORDER BY lastname";

在mysql中加入2个字段以同时搜索两个字段

3 个答案: