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Home > Backend Development > PHP Tutorial > form表单提交后提醒 Undefined variable

form表单提交后提醒 Undefined variable

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Release： 2016-06-13 12:24:45
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form表单提交后提示 Undefined variable
表单提交之后提示num_tries变量未定义，可是明明在第3行就定义了啊
------解决思路----------------------
第三行改一下：（int）强制类型转换的对象应该是$_POST吧。。。

$num_tries = (isset($_POST['num_tries'])) ? ((int)$_POST['num_tries']+1) : 1;
Copy after login

------解决思路----------------------
第 3 行应为
$num_tries = (isset($_POST['num_tries'])) ? $_POST['num_tries']+1 : 1;
不需要强制类型转换

Related labels：
isset nbsp post
source：php.cn
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