php 如何修复“注意未定义索引：”
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How to fix 'Notice Undefined index:'
提问by Sohan Sonar
I received the following error message when I go on searchproduct page. How may i fixed it?
当我进入搜索产品页面时收到以下错误消息。我该如何修复它？
Notice: Undefined index: dosageForm in C:\xampp\htdocs\prism\searchproduct.php on line 29
注意：未定义索引：doesForm in C:\xampp\htdocs\prism\searchproduct.php 第 29 行
Notice: Undefined index: dosageForm in C:\xampp\htdocs\prism\searchproduct.php on line 32
注意：未定义索引：doesForm in C:\xampp\htdocs\prism\searchproduct.php 第 32 行
Notice: Undefined index: strengths in C:\xampp\htdocs\prism\searchproduct.php on line 35
注意：未定义索引：第 35 行 C:\xampp\htdocs\prism\searchproduct.php 中的强度
Notice: Undefined index: strengths in C:\xampp\htdocs\prism\searchproduct.php on line 38
注意：未定义索引：第 38 行 C:\xampp\htdocs\prism\searchproduct.php 中的强度
if($_POST['dataType']!= "") {
$dataType = $_POST['dataType'];
}else{
$dataType = $_GET['dataType'];
}
if($_POST['drugCategory']!= ""){
$drugCategory = $_POST['drugCategory'];
}else{
$drugCategory = $_GET['drugCategory'];
}
if($_POST['productName']!= ""){
$productName = $_POST['productName'];
}else{
$productName = $_GET['productName'];
}
if($_POST['brandName']!= ""){
$brandName = $_POST['brandName'];
}else{
$brandName = $_GET['brandName'];
}
if($_POST['dosageForm']!= ""){
$dosageForm = $_POST['dosageForm'];
}else{
$dosageForm = $_GET['dosageForm'];
}
if($_POST['strengths']!= ""){
$strengths = $_POST['strengths'];
}else{
$strengths = $_GET['strengths'];
}
i am getting same type of error ,
我收到相同类型的错误，
please help me to resolve
请帮我解决
回答by Gectou4
use isset()
用 isset()
if(isset($_POST['drugCategory']))
or in your case : empty()
或者在你的情况下： empty()
if(!empty($_POST['drugCategory']))
Update:
更新：
PHP7.1 allow this one too but it will may be forbidden by CodeStyle's rules
PHP7.1 也允许这个，但它可能被 CodeStyle 的规则禁止
if($_POST['drugCategory'] ?? false)
