如何使用ajax从php推送到jquery数组?

我在服务器(php)上运行以下命令,在其中循环我的帖子并获取gmap字段中的一些坐标:

      $location = get_field('location');
      $lat = $location['lat'];
      $lng = $location['lng'];

然后我创建一对LAT和液化天然气坐标,如下所示:

      $coordinates = $lat.", ".$lng;
      echo $coordinates;

然后在javascript ajax成功的客户端上,我将这两对推送到一个数组中 var coords = []; 我在页脚有。

但我在控制台得到了一个奇怪的结果:

["4"]
(index):148 (2) ["4", "0"]
(index):148 (3) ["4", "0", "."]
(index):148 (4) ["4", "0", ".", "7"]
(index):148 (5) ["4", "0", ".", "7", "2"]
(index):148 (6) ["4", "0", ".", "7", "2", "7"]
(index):148 (7) ["4", "0", ".", "7", "2", "7", "2"]
(index):148 (8) ["4", "0", ".", "7", "2", "7", "2", "0"]...

这就是全部代码:

菲律宾比索

      function data_fetch(){
        $dates = $_POST['dates'];
        $dates = explode(',', $dates);
        $args = array(
          'meta_query' => array(
            array(
              'key' => 'anno',
              'value' => array($dates[0], $dates[1]),
              'compare' => 'BETWEEN',
              'type' => 'NUMERIC'
            ),
          )
        );
        $query = new WP_Query( $args );
        if( $query->have_posts() ): while( $query->have_posts() ) : $query->the_post();
          $location = get_field('location');
          $lat = $location['lat'];
          $lng = $location['lng'];
          $coordinates = $lat.", ".$lng;
          echo $coordinates;
        endwhile; endif;
        die();
      }

javascript

$(document).ready(function() {
  $("#searchNations").on("click", function() {
    //clearOverlays();
    fetch(datesSearch);
  });
  fetch(datesSearch);

  function fetch(datesSearch) {
    $.ajax({
      url: '<?php echo admin_url('
      admin - ajax.php '); ?>',
      type: 'post',
      dataType: 'json',
      data: {
        action: 'data_fetch',
        dates: datesSearch
      },
      success: function(data) {
        var data = $.parseJSON(data);
        for (var i = 0; i < data.length - 1; i++) {
          coords.push(data[i]);
          console.log(coords);
        };
      }
    });
  }
});