drodsh7940 2014-07-01 04:03
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我们如何在php变量中调用js或jq的变量?

can javascript or jquery variable can be read by php code?

Example

<script>
   var num = 3;
</script>
<php?
   $a = 20;
   $b = num*$a;
?>

anyone?

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2条回答 默认 最新

  • doukan4795 2014-07-01 04:13
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    Short answer - No it can't. But there is an alternative known as AJAX where you can send a javascript variable to a php page and make it accessible to that page. Consider the following example:

    $.ajax({
       url:'some-php-page.php',
       type:'post',
       data:{num:3},
       success:function(data_returned)
       {
          // do anything you want with the data returned back
          alert(data_returned); // will alert 60
       }
    });
    

    some-php-page.php

    $num = $_POST['num']; // the key used in the "data" attribute of the ajax call
    $a = 20;
    $b = $num*$a;
    echo $b;
    

    Of course you'll need to include jQuery library in order to use the $.ajax({}). This can be done through plain javascript too, but I prefer to use jQuery as it is much simpler.

    本回答被题主选为最佳回答 , 对您是否有帮助呢?
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