Update a MySQL database field data with HTML form and PHP

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So I am trying to update a database field using a html form and some PHP code, but I cannot get it to work, it throws no errors but does not update the field?, Im not sure if it

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别跟我提以往

2021-01-26 06:45
```
UPDATE table_name
SET column1=value, column2=value2,...
WHERE some_column=some_value
```
Update query sample but i don't get your sql ..you missing your where clause
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谎友^

2021-01-26 07:01

You need to use WHERE Condition whenever you try to update something to table.

Here's my code :

test.html

<html>
<form method="post" action="updateform.php" />

Name : <input type="text"  name="name" /> </br>

<input type="submit" name="Submit" value="update" />

</form>
</html>

updateform.php

<?php 
$name = $_POST['name'];
$connection = mysqli_connect("localhost", "root", "Enter Passwd Here","Enter db_name here"); 
if(mysqli_connect_errno())
{
    echo "failed to connect " . mysqli_connect_error();
}

if(isset($_POST['Submit'])) 
{
    $query = "UPDATE `test_table` SET `name` = '$name' WHERE `cost` = 500"; 
    $result = mysqli_query($connection,$query); 

    if (!$result) {
    die('Error' . mysqli_error($connection));
    }
    else
    {
    echo "Successfully updated";
    }
}
?>

To demonstrate I've created a database & table test_table with 3 field. (id,name,cost)

This is the structure of my table :

enter image description here

Before executing the above script, our table contains this datas

enter image description here

After executing the script, the name in second row changes from ramu to shiva since we specified cost as 500 in WHERE Condition.

$query = "UPDATE `test_table` SET `name` = '$name' WHERE `cost` = 500";

enter image description here

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