无法将数据更新到数据库

问题描述：

数据库无法更新数据，并且

the database cannot update the data and

$customer_id =$_GET[''customer_id''];

在这里是错误的.有人请帮助我:''(

我尝试过的事情:

is error here. someone please help me :''(

What I have tried:

<?php

include "config.php";
$link = mysqli_connect($h ,$u ,$p,$db);
$customer_id =$_GET[''customer_id''];

$sql="select*from customer where customer_id=''$customer_id'' ";
$result=mysqli_query($link,$sql);
$check =mysqli_fetch_array($result);

if (isset($_POST[''done'']))
{

$cuname=$_POST[''cuname''];
$phoneno=$_POST[''phoneno''];
$email=$_POST[''email''];
$address=$_POST[''address''];

$sql="update customer set cuname=''$cuname'',phoneno=''$phoneno'',email=''$email'',address=''$address'' where customer_id=''$customer_id''";

if(!$sql)
{
echo "error";
}
else {
echo "try again" ;
}
}


?>

<html>
<form  method=post onsubmit="return check()"  >
<input type="text" name="cuname" value="<?php echo $check[''cuname''];?>" placeholder="name">
<input type="text" name="phoneno" value="<?php echo $check[''phoneno''];?>" placeholder="phoneno">
<input type="text" name="email" value="<?php echo $check[''email''];?>" placeholder="email">
<input type="text" name="address" value="<?php echo $check[''address''];?>" placeholder="address">
<input type="submit" name="done" >

</form>
</html>
<a href="home.html">Home</a>

答

customer_id =

_GET [''customer_id''];

_GET[''customer_id''];

是错误的.有人请帮助我:''(

我尝试过的事情:

is error here. someone please help me :''(

What I have tried:

<?php

include "config.php";

link = mysqli_connect(

无法将数据更新到数据库

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