php - MySQL之类的查询不起作用？

Question

我在 PDO 中成功连接到我的 MySQL 数据库，目前我正在尝试让它在数据库中查询类似搜索查询的项目。

<?php
include ('connection.php');

function doSearch() {
    $output = '';
    if(isset($_POST['search'])) {
        $searchq = $_POST['search'];
        $searchq = preg_replace ("#[^0-9a-z]#i","",$searchq);
    $sql = "SELECT * FROM entries WHERE name LIKE :searchq or description LIKE :searchq or content LIKE :searchq";

    global $conn;
    $stmt = $conn->prepare($sql);
    $stmt->bindParam(":searchq",$searchq,PDO::PARAM_STR);
    $stmt->execute();
    $count = $stmt->rowCount();
 if($count == 0) {
            $output = 'No results found, buddy.';
        } else {
            while($row = $stmt->fetch(PDO::FETCH_ASSOC)) {
                $eName = $row['name'];
                $eDesc = $row['description'];
                $eCont = $row['content'];
                $id = $row['id'];
                $elvl = $row['level'];
                $ehp = $row['hp'];

                $output .= '<tr><td><a href="http://ccc.aaaa.whatever/' .$eName. '" onclick="document.linkform.submit();">'.$eName.'</a></td><td>'.$eDesc.'</td><td>'.$elvl.'</td><td>'.$ehp.'</td></tr>';
            }
        }            

    return $output;
    }
 }
?>

我正在努力让它被搜索。除非查询仅与名称完全匹配，否则不会显示任何结果。

Answer 1

除非特别指示，LIKE 运算符不会进行部分匹配。也许您想在搜索字符串前添加/附加 % 通配符:

$searchq = '%' . $searchq . '%';