<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><img src="1.jpg" width="200" height="200"></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><img src="2.jpg" width="200" height="200"></td>
<td> </td>
</tr>
<tr>
<td><img src="3.jpg" width="200" height="200"></td>
<td> </td>
</tr>
<tr>
<td><img src="4.jpg" width="200" height="200"></td>
<td> </td>
</tr>
</table>
<script type="text/javascript">
function Check1(){
var input = document.getElementById("num");
if(input.value)
}
</script>
</html>
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
天蓬老师2017-04-10 16:34:12
你可以直接在 js 中写
var num = <?php echo $num;?>;
你需要知道 PHP 和 js 执行的先后顺序。请踩者告诉我问题所在可以吗,我好改进。