How to update through foreach loop - php

Question

I want to update data of form fields in database through foreach loop. I have two columns in test_table ID and Input. I have fetched data through while loop and also have printed the value. Now I want to update fetched value. Please give some guidance for this.
Here is my code,
$sql = "select * from test_table";
if($result = mysqli_query($conn, $sql))
{
while($row = mysqli_fetch_array($result))
{
$inputResult[]=$row;
}
} <form method="POST"> <input type="text" value=<?php
echo $inputResult[0]['Input']; ?> id="$inputResult[0]['ID']"> <input
type="submit" name="submit"> </form> <?php
if (isset($_POST['submit'])
{
$input = $inputResult[];
foreach($input as $inputs => $value)
{
$Sql = "update test_table set Input='$value' where = '$inputs'";
mysqli_query($conn, $sql);
}
} ?>
Please let me know what errors have in my code ? Thanks in advance.

Answer 1

Next solution is very specific to your problem. The input text is the first element in your form, so, in the PHP code, we can get the input's ID and the VALUE by accessing the first item in the array $_POST (changes are pointed by arrows ◄■■■):
<?php
$sql = "select * from test_table";
if($result = mysqli_query($conn, $sql)) {
while($row = mysqli_fetch_array($result)) {
$inputResult[]=$row;
}
}
?>
<form method="POST">
<input type="text" value="<?php echo $inputResult[0]['Input'];?>"
name="<?php echo $inputResult[0]['ID'];?>" /> ◄■■■ NAME, NOT ID.
<input type="submit" name="submit" />
</form>
<?php
if ( isset($_POST['submit']) ) {
$value = reset( $_POST ); // ◄■■■ FIRST VALUE IN $_POST (['input']).
$id = key( $_POST ); // ◄■■■ FIRST KEY IN $_POST (['ID']).
$Sql = "update test_table set Input='$value' where id='$id'"; // ◄■■■ $VALUE AND $ID.
mysqli_query($conn, $sql);
}
?>
I replaced the attribute id= by name= in the input text, because PHP needs names, not ids.
After we get the first value and the first key, we can insert them into the sql string.
Edit :
Fixed the missing tags (oops!). I think I found the error, it's so little that it's hard to see : pay attention to next line:
▼
$Sql = "update test_table set Input='$value' where id='$id'"; // ◄■■■ $VALUE AND $ID.
Do you see the variable on the left : $Sql (the first letter is uppercased). Now let's see the next line:
▼
mysqli_query($conn, $sql);
The same variable is not uppercased, once you fix that, everything works :
▼
$sql = "update test_table set Input='$value' where id='$id'"; // ◄■■■ $VALUE AND $ID.
mysqli_query($conn, $sql);
▲