点击按钮毫无反应是什么原因呢？

Question

我想在点击这个按钮后调用函数function query();来查询数据库并将结果显示出来，应该怎样在PHP中实现点击按钮来调用query():函数呢？
<?php
function query(){
echo "<script language=\"JavaScript\">alert(\"haha！\");</script>";
}
if($_POST["do"]=="yes"){
query();
}
?>
<input type="button" value="按钮" onclick="javascript:cmdclick()"/>
<script type="text/javascript">
function cmdclick(){
document.location.href="?do=yes";
}
</script>

Answer 1

给你一个最简单的示例<?phpfunction query(){........代码......}if($_POST["do"]=="yes"){query();}?><input type="button" value="按钮" onclick="javascript:cmdclick()"/><script type="text/javascript">function cmdclick(){document.location.href="?do=yes";}</script>

Answer 2

源代码如下：<?phpfunction show(){//....}?><script language="JavaScript">function bt_click(){..<?php show();?>..}</script><input type="button" name="show" id="show" value="提交" onClick="bt_click();"/>