如果字符串在MYSQL行中，则进行PHP搜索

<?php
// 连接MYSQL数据库
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "database";

$conn = new mysqli($servername, $username, $password, $dbname);

// 检查连接是否成功
if ($conn->connect_error) {
    die("连接失败: " . $conn->connect_error);
}

// 准备查询语句
$searchString = "search string";
$sql = "SELECT * FROM table_name WHERE column_name LIKE '%$searchString%'";

// 执行查询
$result = $conn->query($sql);

// 检查查询结果
if ($result->num_rows > 0) {
    // 输出每一行数据
    while($row = $result->fetch_assoc()) {
        echo "列1: " . $row["column1"]. " - 列2: " . $row["column2"]. "<br>";
    }
} else {
    echo "没有找到匹配的结果";
}

// 关闭数据库连接
$conn->close();
?>