[英]notice php - alternative or remove?
i am using this code to check if the variables $n0, $n1, $n2
are not defined.我正在使用此代码检查变量
$n0, $n1, $n2
是否未定义。
But i get a notice each time that was not defined.但是每次我都会收到未定义的通知。 My code is a bad practice?
我的代码是一个不好的做法? there is any alternative?
有什么选择吗? or just remove the notices and the code is fine?
或者只是删除通知并且代码很好?
if (!isset ($n0) && $n0 != $form['name0']){
echo ("n0");
}
if (!isset ($n1) && $n1 != $form['name1']) {
echo ("n1");
}
if (!isset ($n2) && $n2 != $form['name2']) {
echo ("n2");
}
thanks谢谢
You should actually be replacing those &&
's with ||
您实际上应该将那些
&&
替换为||
's.的。 If the
$n
's aren't set then they surely won't equal the $form
values..如果未设置
$n
,那么它们肯定不会等于$form
值。
This will prevent the notices and do what you're intending这将阻止通知并执行您想要的操作
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