用ajax和php传递数组

问题描述：

I need to add a class to some elements based on the time without page reload

I am creating this array when the page loads. I have a start time, an end time and an identifier.

$hrs = array(
    array("2013-07-27 21:00", "2013-07-27 22:00", "one"),
    array("2013-07-27 22:00", "2013-07-27 23:00", "two"),
    array("2013-07-27 23:00", "2013-07-28 00:00", "three"),
);

Then I get the current time and grab the identifier from the array. I tried running this script in a separate file time.php using setInterval but I can't pass $hrs.

<ul>
      <li class="one">1</li>
      <li class="two">2</li>
      <li class="three">3</li>


</ul>

var className = "<?php echo $class_name"; ?>
$(className).addClass("red");

what is the proper way of running this so I won't need to refresh the page? I did something like this but it alerts error:

* Working code below ****

<script>

var hrs = '<?php echo json_encode($hrs); ?>';

//get active class from time.php
  $.ajax({
    url : 'http://domain.com/time.php',
    type : 'POST',
data : { val : hrs },
    dataType : 'json',
    success : function (result) {
       className = result['current_class'];

    },
    error : function () {
       alert("error");
    }
})

</script>

time.php

        $hrs = json_decode($_POST['val']);

    date_default_timezone_set('Europe/Bucharest');
    $date  = date('Y/m/d H:i');

    $test = strtotime($date);

    $now = date("Y-m-d H:i", $test);

    $class_name = "";
    foreach ($_POST['val'] as $h) {
    if ($h[0] <= $now and $now <= $h[1]) {
        $class_name = $h[2];fa
        break;
    }
    } 

$class = array(
        'current_class' => ( $class_name ),
    );
    echo json_encode($class);

我需要根据没有页面重新加载的时间为某些元素添加一个类 p>

我在页面加载时创建此数组。我有一个开始时间，一个结束时间和一个标识符。 p>

  $ hrs = array（
 array（“2013-07-27 21:00”，“2013-”  07-27 22:00“，”one“），
 array（”2013-07-27 22:00“，”2013-07-27 23:00“，”two“），
 array（”2013  -07-27 23:00“，”2013-07-28 00:00“，”三“），
）; 
  code>  pre> 
 
 然后我得到了 当前时间并从数组中获取标识符。 我尝试使用 setInterval  code>在单独的文件time.php中运行此脚本，但我无法传递 $ hrs  code>。 p> 
 
 
 ＆lt; ul＆gt; 
＆lt; li class =“one”＆gt; 1＆lt; / li＆gt; 
＆lt; li class =“two”＆gt; 2＆lt; / li＆gt; 
＆lt; li class =“three”＆gt  ; 3＆lt; / li＆gt; 
 
 
＆lt; / ul＆gt; 
 
var className =“＆lt;？php echo $ class_name”;  ？＆gt; 
 $（className）.addClass（“red”）; 
  code>  pre> 
 
 运行此操作的正确方法是什么，所以我不需要刷新 这页纸？ 我做了类似的事情，但它警告错误： p> 
 
 
    strong>  em> *工作代码 *  em> ***   p> 
 
 
 ＆lt; script＆gt; 
 
var hrs ='＆lt;？php echo json_encode（$ hrs）;  ？＆gt;'; 
 
 //从time.php获取活动类
 $ .ajax（{
 url：'http：//domain.com/time.php'，
n type：'POST'  ，
data：{val：hrs}，
 dataType：'json'，
 success：function（result）{
 className = result ['current_class']; 
 
}，
 error：function（  ）{
 alert（“error”）; 
} 
}）
 
＆lt; / script＆gt; 
  code>  pre> 
 
  time.php  p>  
 
 
  $ hrs = json_decode（$ _ POST ['val']）; 
 
 date_default_timezone_set（'Europe / Bucharest'）; 
 $ date = date（'Y / m / d  H：i'）; 
 
 $ test = strtotime（$ date）; 
 
 $ now = date（“Ymd H：i”，$ test）; 
 
 $ class_name =“”; \  n foreach（$ _POST ['val'] as $ h）{
 if（$ h [0]＆lt; = $ now and $ now＆lt; = $ h [1]）{
 $ class_name = $ h [  2]; fa 
 break; 
} 
} 
 
 $ class = array（
'current_class'=＆gt;（$ class_name），
）; 
 echo json_encode（$ class）; \  n  code>  pre> 
  div>

答

Replace:

var hrs = '<?php echo $hrs; ?>';

To:

var hrs = '<?php echo json_encode($hrs) ?>';

答

If you are sending data using POST

type : 'POST',

You have to access it using $_POST, you are using $_GET.

$_POST['val']

答

Neither language has any clue about the internals of the other language, your best bet to pass a full array is to encode the AJAX side array to JSON, pass that to your PHP script, and then use json_decode to decode it into a PHP array.

You could also try passing the parameters with square brackets on the end, with the same name as php interprets this as an array. i.e.

file.php?p[]=1&p[]=2&p[]=3&p[]=4&p[]=5

Would result in $_GET['p'] being a 5 item array containing 1 - 5.

The same is also true of post, if you post multiple p[]'s, you will end up with $_POST['p'] as an array of all your elements.

用ajax和php传递数组

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