doulanli6146 2012-04-14 21:40
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从MYSQL表更新值而不重新加载页面？

I've build a small login system for a home project,so,when the user do the login,he is redirect to the userspage.php.In the page i get some data from my mysql table,but the problem is,one of the values i fetch is display to the user with a button near it,when the user press those button i need to perform an php action to increase the value which is display with the button(as an example==> myvalue = 10 | When the user clicks on the button: myvalue = 11 ).I've already build this part,it is working perfectly,but i need to increase the value and update the mysql column without refreshing the page?I know its possible but every tutorial from the web i've tried doesn't work.

Thanks is advance!

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  • dongwujie7477 2012-04-14 22:28
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    The following code has a button which onclick calls updatedb.php and shows its output in div element called 'result'

    <html>
<head>
<script type="text/javascript">
function UpdateDb()
{
if (window.XMLHttpRequest)
  {// code for IE7+, Firefox, Chrome, Opera, Safari
  xmlhttp=new XMLHttpRequest();
  }
else
  {// code for IE6, IE5
  xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
  }
xmlhttp.onreadystatechange=function()
  {
  if (xmlhttp.readyState==4 && xmlhttp.status==200)
    {
    document.getElementById("result").innerHTML=xmlhttp.responseText;
    }
  }
xmlhttp.open("GET","updatedb.php",true);
xmlhttp.send();
}
</script>


   </head>
    <body>

<button onclick='UpdateDb()'>Update</button>
<p> <span id="result"></span></p>

</body>
</html>

    Then write updatedb.php

    <?php
do mysql update here.
and echo the result you want to display.
?>
    本回答被题主选为最佳回答 , 对您是否有帮助呢?
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