javascript - 如何把php取出来的值放入js函数中？-php教程-PHP中文网

javascript - 如何把php取出来的值放入js函数中？

php中文网

发布： 2016-06-06 20:22:29

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<html>
<head><title>All Items</title>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
</head>

<body bgcolor = "black">

<center>
<font color="white">所有文具</font>

<br><br><br>
<hr>

<br><br><br>


</center>

</body>

<table width="370" border="1">
  <tr>
    <td>@@##@@</td>
    <td><font color = "white">品名：笔记本<br>
        价格：10元<br>
        描述：A4大小，120页<br>
        库存：<script language = "php">//用于查询库存
            mysql_connect("localhost","root","") or die(mysql_error());  
            mysql_select_db("user_info");  
            $sql="select * from inventory where pid='1'";  
            $query=mysql_query($sql);  
            $result = mysql_fetch_array($query);  
            @$num = $result['pnum'];   
            echo $num;
            </script><br>
           购买数量：<input type = "text" size = "5" id = "num"/><br>
        <center>
        <br>
        <input type= "button" value = "加入购物车" onclick= "javascript:test('<?php echo $num?>')"/>
        </center>
        </font>
    </td>
  </tr>
  <tr>
    <td>@@##@@</td>
    <td> </td>
  </tr>
  <tr>
    <td>@@##@@</td>
    <td> </td>
  </tr>
  <tr>
    <td>@@##@@</td>
    <td> </td>
  </tr>

</table>


<script type="text/javascript">

function Check1(){
  var input = document.getElementById("num");
  if(input.value)
}


</script>



</html>

登录后复制

本人想把php中取出来的商品数量放入js函数中进行库存判断。请问如何实现？？本人初学者

回复内容：

<html>
<head><title>All Items</title>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
</head>

<body bgcolor = "black">

<center>
<font color="white">所有文具</font>

<br><br><br>
<hr>

<br><br><br>


</center>

</body>

<table width="370" border="1">
  <tr>
    <td>@@##@@</td>
    <td><font color = "white">品名：笔记本<br>
        价格：10元<br>
        描述：A4大小，120页<br>
        库存：<script language = "php">//用于查询库存
            mysql_connect("localhost","root","") or die(mysql_error());  
            mysql_select_db("user_info");  
            $sql="select * from inventory where pid='1'";  
            $query=mysql_query($sql);  
            $result = mysql_fetch_array($query);  
            @$num = $result['pnum'];   
            echo $num;
            </script><br>
           购买数量：<input type = "text" size = "5" id = "num"/><br>
        <center>
        <br>
        <input type= "button" value = "加入购物车" onclick= "javascript:test('<?php echo $num?>')"/>
        </center>
        </font>
    </td>
  </tr>
  <tr>
    <td>@@##@@</td>
    <td> </td>
  </tr>
  <tr>
    <td>@@##@@</td>
    <td> </td>
  </tr>
  <tr>
    <td>@@##@@</td>
    <td> </td>
  </tr>

</table>


<script type="text/javascript">

function Check1(){
  var input = document.getElementById("num");
  if(input.value)
}


</script>



</html>

登录后复制

本人想把php中取出来的商品数量放入js函数中进行库存判断。请问如何实现？？本人初学者

你可以直接在 js 中写