PHP 同时 + if 语句问题
我有这个：
while($row = mysql_fetch_array($result)) {
$number1=$row["number"];
if (!empty($number1)) {
// A few things happen here using if statements aswell but its fine
}
if (empty($number1)) {
// A few things happen here using if statements aswell but its fine
}
}
由于某种原因，数据在那里但不起作用。根本不会出现任何错误，然后它会重定向到我希望它重定向到的页面。
I have this:
while($row = mysql_fetch_array($result)) {
$number1=$row["number"];
if (!empty($number1)) {
// A few things happen here using if statements aswell but its fine
}
if (empty($number1)) {
// A few things happen here using if statements aswell but its fine
}
}
For some reason, the data is there but it isn't working. No errors emerge at all and it then redirects to the page I want it to redirect to.
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评论（3）
您是否知道
empty的作用比您想象的要多思考？例如，
empty("0")为true。使用 if (strlen($number1) > 0) 可能会更好。
Are you aware that
emptydoes more than you might think?For example,
empty("0")istrue.You might be better off with
if (strlen($number1) > 0).也许空会在您可能期望为 true 的项目上返回 false...（例如 0）。请参阅：http://php.net/manual/en/function.empty.php
Maybe empty is returning false on an item that you might expect to be true... (for example 0). See: http://php.net/manual/en/function.empty.php
您应该检查（打印出来或其他什么）
$number1是否包含您期望的内容？empty($number1)的行为是否符合您的预期？You should check (print out or whatever)
$number1contain what you expect?empty($number1)behave as you expect?