Vue implements fuzzy query-Mysql database data

<el-input v-model="keyWord" placeholder="Please enter the keyword to search" clearable></el-input>
        <el-button type="success" icon="el-icon-search" @click="search"></el-button>

//Method to request database data getData(offset,limit){
      this.axios.post('/php/search.php', qs.stringify({
        offset: offset,
        limit: limit,
        keyWord: this.keyWord
      }), { headers: { 'Content-Type': 'application/x-www-form-urlencoded' } }).then((res) => {
        this.total = res.data.total
        this.resultList = res.data.data
      }).catch((err) => {
        this.$message.error(err)
      })

<?php
$servername = "Host Address";
$username = "account";
$password = "password";
$dbname = "Database name";

// Create a connection $conn = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
} 

$keyWord = $_POST['keyWord'];
//Get the start and end number of the front-end parameters
if ( !isset( $_POST['offset'] ) ) {
 echo 0;
 exit();
};
$offset = ( int )$_POST['offset'];

if ( !isset( $_POST['limit'] ) ) {
 echo 0;
 exit();
};
$limit = ( int )$_POST['limit'];
//Pagination query database $sql = "SELECT * FROM posts where title like '%$keyWord%' order by id desc LIMIT $limit OFFSET $offset";
$result = $conn->query($sql);

$sqlGetCount = "SELECT COUNT(*) cnt FROM posts where title like '%$keyWord%'";
$rescnt = $conn->query($sqlGetCount);
$rescnt = $rescnt->fetch_assoc();
$arr = array();
if ($result->num_rows > 0) {
 while ( $row = $result->fetch_assoc() ) {
    array_push( $arr, $row );
}
 //echo json_encode( $arr, JSON_UNESCAPED_UNICODE );
 echo json_encode(array_merge(array('data'=>$arr),array('total'=>(int)$rescnt['cnt'])));
 
} else {
    echo 0;
}
mysqli_close( $conn );
?>

SELECT * FROM posts where title like '%$keyWord%' order by id desc LIMIT $limit OFFSET $offset;