如何通过 PHP 发布请求获取 JavaScript 变量？

Question

我通过 jquery ajax发布PHP文件（ ）。post.php我想以 javascript 变量的形式从中获取数据。我成功地在我的控制台中获取了数据。但我不知道如何使用这个变量。你可以在下面看到我的代码。$.post(    "post.php",    {      region: region,      district: district    },    function(data) {      console.log(data);    }  );我的 post.php 页面看起来像这样    @include('../../_partials/_dbConnect.php');    $region = $_POST['region'];    $district = $_POST['district'];    $sql = "SELECT * FROM table1 WHERE name_rg= '".$region."'";    $result = pg_query($db_connection, $sql);        while ($row = pg_fetch_row($result)) {            $cols = array($row[0],$row[1],$row[2],$row[3],$row[4],$row[5],$row[6],$row[7],$row[8],$row[9],$row[10],$row[11],$row[12],$row[13],$row[14],$row[15],$row[16],$row[17],$row[18],$row[19],$row[20],$row[21]);        }<script>  var cols = [<?php echo '"'.implode('","', $cols).'"' ?>];</script>console.log(data)像这样的输出，<script>  var cols = ["94","32","361","0","118","159","0","243","702","1775","8","0","2","0","150","135","381","2","0","0","0","0"];</script>非常感谢您的帮助。

Answer 1

在您的post.php中，您可以简单地回显数组，jQuery 应该自动将其转换array为响应

// post.php

<?php

    @include('../../_partials/_dbConnect.php');

    $region = $_POST['region'];

    $district = $_POST['district'];

    $sql = "SELECT * FROM table1 WHERE name_rg= '".$region."'";

    $result = pg_query($db_connection, $sql);

    while ($row = pg_fetch_row($result)) {

        $cols = array($row[0],$row[1],$row[2],$row[3],$row[4],$row[5],$row[6],$row[7],$row[8],$row[9],$row[10],$row[11],$row[12],$row[13],$row[14],$row[15],$row[16],$row[17],$row[18],$row[19],$row[20],$row[21]);

    }

    echo json_encode($cols);

?>

// Somewhere in your js

$.post(

    "post.php",

    {

      region: region,

      district: district

    },

    function(data) {

      console.log(data[0]);

    }

);

Answer 2

在 javascript 中使用 JSON.parse()

$.post(

    "post.php",

    {

      region: region,

      district: district

    },

    function(data) {

      data=JSON.parse(data);

    }

);```

And here you go, u can play with it as you need

Happy learning!