PHP中未定义的变量 [英] Undefined variable in PHP
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问题描述
我是php的新手（它可能是一个愚蠢的问题）。我正在尝试创建一个CRUD应用程序。当我尝试获取值$ countryName时我收到错误
注意：未定义的变量：countryName
if（isset（$ _ GET [edited]））{
$ country = $ helper-> fetchCountry（$ _ GET [ countryId]）;
$ countryName = $ country [countryName];
$ helper-> updateCountry（$ countryName）;
helper :: redirect（？updated = 1）;
}
< form action =method =post>
< div class =form-group>
< label>ÜlkeAdı< / label>
< input type =textclass =form-controlname =editName value =<？php echo $ countryName;？>> HERE
< / div>
< div class =form-groupalign =center>
< button class =btn btn-primaryname =btnEdit>编辑< / button>
< / div>
< / form>
这是我到目前为止所尝试的
我尝试了什么：
<？php
包括system / config.php;
包括system / helper.php;
$ conn = new baglanti（）;
$ helper = new helper（）;
？>
<！doctype html>
< html lang =en>
< head>
< / head>
< body>
<？php
$ data = $ helper-> fetchAllData（）;
if（isset（$ _ POST [btnAdd]））{
$ name = strip_tags（$ _ POST [Name]）;
$ helper-> addData（$ name）;
helper :: redirect（？inserted = 1）;
}
if（isset（$ _ GET [edited]））{
$ country = $ helper-> fetchCountry（$ _GET [ countryId]）;
$ countryName = $ country [countryName];
$ helper-> updateCountry（$ countryName）;
helper :: redirect（？updated = 1）;
}
？>
< div class =container>
< div class =row>
< div class =col-md-8>
< form action =method =post>
< div class =form-group>
< label>ÜlkeAdı< / label>
< input type =textclass =form-controlname =editNamevalue =<？php echo $ countryName;？>>
< / div>
< div class =form-groupalign =center>
< button class =btn btn-primaryname =btnEdit>编辑< / button>
< / div>
< / form>
< form action =method =post>
< div class =form-group>
< label>ÜlkeAdı< / label>
< input type =textclass =form-controlname =Name>
< / div>
< div class =form-groupalign =center>
< button class =btn btn-successname =btnAdd> Ekle< / button>
< / div>
< / form>
< / div>
< table class =table table-striped>
< tr>
< td>ÜlkeAdi< / td>
< td>Düzenle< / td>
< td> Sil< / td>
< / tr>
<？php
if（count（$ data）> 0）{
foreach（$ data as $ key => $ value）{
？>
< tr>
< td><？php echo $ value [countryName];？>< / td>
< td>< a href =？edited = 1& countryId =<？php echo $ value [countryId];？>>Düzenle< / a> < / TD>
< td>< a href =？deleted = 1& countryId =<？php echo $ value [countryId];？>> Sil< / a> < / TD>
< / tr>
<？php
}
}其他{
？>
< tr>
< div class =row>
< td colspan =3class =>无数据< / td>
< / div>
< / tr>
<？php
}
？>
< / table>
< / div>
< / div>
< / body>
< / html>
解决方案
countryName
通知：未定义变量：countryName
if（isset（
_GET [edited]））{
国=
I am new to php and (Its probably a silly question ).I am trying to make a CRUD application.I am getting error when I try to get the value "$countryName"
Notice: Undefined variable: countryName
if(isset($_GET["edited"])){
$country=$helper->fetchCountry($_GET["countryId"]);
$countryName=$country["countryName"];
$helper->updateCountry($countryName);
helper::redirect("?updated=1");
}<form action="" method="post">
<div class="form-group">
<label>Ülke Adı</label>
<input type="text" class="form-control" name="editName" value="<?php echo $countryName;?>"> HERE
</div>
<div class="form-group" align="center">
<button class="btn btn-primary" name="btnEdit">Edit</button>
</div>
</form>this what I have tried so far
What I have tried:
<?php
include "system/config.php";
include "system/helper.php";
$conn=new baglanti();
$helper=new helper();
?>
<!doctype html>
<html lang="en">
<head>
</head>
<body>
<?php
$data=$helper->fetchAllData();
if(isset($_POST["btnAdd"])){
$name=strip_tags($_POST["Name"]);
$helper->addData($name);
helper::redirect("?inserted=1");
}
if(isset($_GET["edited"])){
$country=$helper->fetchCountry($_GET["countryId"]);
$countryName=$country["countryName"];
$helper->updateCountry($countryName);
helper::redirect("?updated=1");
}
?>
<div class="container">
<div class="row">
<div class="col-md-8">
<form action="" method="post">
<div class="form-group">
<label>Ülke Adı</label>
<input type="text" class="form-control" name="editName" value="<?php echo $countryName;?>">
</div>
<div class="form-group" align="center">
<button class="btn btn-primary" name="btnEdit">Edit</button>
</div>
</form>
<form action="" method="post">
<div class="form-group">
<label>Ülke Adı</label>
<input type="text" class="form-control" name="Name">
</div>
<div class="form-group" align="center">
<button class="btn btn-success" name="btnAdd">Ekle</button>
</div>
</form>
</div>
<table class="table table-striped">
<tr>
<td>Ülke Adi</td>
<td>Düzenle</td>
<td>Sil</td>
</tr>
<?php
if(count($data)>0){
foreach ($data as $key=>$value){
?>
<tr>
<td><?php echo $value["countryName"] ;?></td>
<td><a href="?edited=1&countryId=<?php echo $value["countryId"];?>">Düzenle</a> </td>
<td><a href="?deleted=1&countryId=<?php echo $value["countryId"];?>">Sil</a> </td>
</tr>
<?php
}
}else{
?>
<tr>
<div class="row">
<td colspan="3" class="">No Data</td>
</div>
</tr>
<?php
}
?>
</table>
</div>
</div>
</body>
</html> 解决方案
countryName"
Notice: Undefined variable: countryNameif(isset(
_GET["edited"])){
country=
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