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后台程序也有浏览器兼容有关问题

WBOY
Release： 2016-06-13 11:50:00
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后台程序也有浏览器兼容问题?
if(!is_numeric($num)){
echo '<script>alert("请输入数字！");</script>';
}

在IE浏览器下输入数字也会执行if里的弹框 求解
------解决方案--------------------
后台程序跟浏览器兼容木有关系啊
------解决方案--------------------
$num 从哪来的，打印出来看看

Related labels：
alert nbsp script
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