我有一个dynamicaly php页面，它显示来自数据库的所有结果，我想创建一个搜索栏，在用户输入的每个字符处更新。我的问题是我不能更新查询！他总是毫无结果。首先，我将查询与表单放在同一个页面中，但这不起作用，因为当我在参数中使用该url时，ajax将运行页面中的所有代码，所以我拆分了所有内容，但仍然不起作用。有什么建议吗？
php页面-与搜索栏-->categorias.php一起使用：

<div class="container">
<h2 class="title">Empresas De Confianza</h2>
<div class="col-lg-12">
    <div class="col-lg-6 col-centered">
        <form method="POST" action="buscador.php" id="search">
            <input class="search-bar" type="text" name="filterName" id="filterName">
            <button type="submit" hidden></button>
            <?php
            $msqliquery = "SELECT * FROM empresa WHERE categorias_id = $id AND menulogo IS NOT NULL";
            $array = $connection->query($msqliquery);
            ?>
        </form>
    </div>
</div>

<?php
echo '<div class="row index-margin" id="results">';

if (mysqli_num_rows($array) == 0) {
    echo "<h2 class='text-center'>No hemos encontrado ningún resultado con esa busqueda!</h2><ul class='text-center'><li class='list-categorias'><a class='fa-categorias fa fa-refresh' href='categorias.php?id=$id'></a></li></ul>";
};
while ($field = mysqli_fetch_array($array)) {
    ?>
    <div class="col-xs-3 col-sm-3 col-md-3 col-lg-3 parent size">
        <a style="background-color:<?php echo $field['color'] ?>"
           href="profile.php?id=<?php echo $field['id'] ?>">
            <img src="/test<?php echo $field['menulogo'] ?>" class="logo img-grayscale">
            <div class="hover-item"><h5 class="label-profile"><?php echo $field['nombre'] ?></h5></div>
        </a>
    </div>
<?php }
echo '</div>' ?>

´ 表单/搜索栏处理-->buscador.php：

<?php
require 'config.php';
$connection = new mysqli($servername, $username, $password, $db);
session_start();
$id = $_SESSION['id'];

$filterName = $_POST['filterName'];
$msqliquery = "SELECT * FROM empresa WHERE categorias_id = $id AND menulogo 
IS NOT NULL AND nombre COLLATE UTF8_GENERAL_CI LIKE '%$filterName%'";
$array = $connection->query($msqliquery);

用于在每个字符和ajax表单提交时更新的函数：

$(document).ready(function () {

    var timeoutID = null;

    $('#filterName').keyup(function (e) {
        clearTimeout(timeoutID);
        timeoutID = setTimeout(searchEmpresa.bind(undefined, e.target.value), 500);
    });

    function searchEmpresa(str) {
        console.log('search: ' + str);
        $("#search").submit(function (event) {
            $.ajax({
                method: "POST",
                url: 'buscador.php',
                data: $("#filterName").val(),
                success: function (data) {
                    console.log(data);
                    $("#results").load("categorias.php #results > *");
                }
            });
            event.preventDefault();
        });
    }
})