Single submit button should perform multiple actions in php - php

Question

I have two php pages.
dataentryform.php
report.php
In dataentryform.php through form tag I'm taking 19 user inputs with fcode being a primary key. Upon submit I want two things to happen.
data stored into the database
the data entered in the form should get displayed on the report.php
file.
My Problem:
Able to store values into the database and also retrieve it.
But, the values printed on the report.php file will always
correspond to the first row in the table
How do I fix this?
dataentryform.php
<form method="post" action="includes/dbinsert.php">
<table width="650" border="1" class="table1">
<tbody>
<tr>
<td class="label">Farmer's Code</td>
<td width="350" colspan="2"><input type="text" name="fcode"
class="text" autocomplete="off" required></td>
</tr>
<tr>
<td class="label">Farmer Name</td>
<td width="350" colspan="2"><input type="text" name="fname"
class="text" autocomplete="off" required></td>
</tr>
<tr>
<td class="label">Village/ Town</td>
<td colspan="2"><input type="text" name="village" class="text"
autocomplete="off" required></td>
</tr>
<tr>
<td class="label">Survey Number</td>
<td width="350" colspan="2"><input type="text" name="surnum"
class="text" autocomplete="off" required></td>
</tr>
<tr>
<td class="label">Plot Number</td>
<td width="350" colspan="2"><input type="text" name="plotnum"
class="text" autocomplete="off" required></td>
</tr>
...
...
...
...
...
...
...
...
...
...
...
...
<tr>
<td class="label">Potash (Tons/Acre)</td>
<td width="350" colspan="2"><input type="number" name="potash"
class="range" min="0" step="0.001" autocomplete="off" required></td>
</tr>
</tbody>
</table>
</div>
<button type="submit" name="submit" class="submit">Submit</button>
</div>
</form>
dbinsert.php
<?php
include 'dbconnect.php';
$fcode = $_POST['fcode'];
$fname = $_POST['fname'];
$village = $_POST['village'];
$surnum = $_POST['surnum'];
$plotnum = $_POST['plotnum'];
$acre = $_POST['acre'];
$gunta = $_POST['gunta'];
$soiltype = $_POST['soiltype'];
$wtrsrc = $_POST['wtrsrc'];
$factory = $_POST['factory'];
$labnum = $_POST['labnum'];
$nextcrop = $_POST['nextcrop'];
$coldate = $_POST['coldate'];
$gendate = $_POST['gendate'];
$season = $_POST['season'];
$taryield = $_POST['taryield'];
$nitro = $_POST['nitro'];
$phos = $_POST['phos'];
$potash = $_POST['potash'];
$sql = "INSERT INTO forminfo (fcode,fname,village,surnum,plotnum,acre,gunta,soiltype,wtrsrc,factory,labnum,
nextcrop,coldate,gendate,season,taryield,nitro,phos,potash)
VALUES ('$fcode','$fname','$village','$surnum','$plotnum','$acre','$gunta','$soiltype','$wtrsrc','$factory','$labnum',
'$nextcrop','$coldate','$gendate','$season','$taryield','$nitro','$phos','$potash');";
mysqli_query($conn, $sql);
header('location:../report.php');
?>
dbinsert.php is inserting values into the database. Then redirecting to report.php. Here I'm including dbextract.php. However, values displayed in report.php are incorrect.
Tried with this also but no luck.
dbextract.php
<?php
include 'dbconnect.php';
$fcode = $_POST['fcode'];
$sql = "SELECT * FROM forminfo WHERE fcode=['$fcode']";
$result = mysqli_query($conn, $sql);
$row = mysqli_fetch_array($result);
?>
Error: Unidentified variable $fcode.

Answer 1

You could use session variables by adding
session_start();
$_SESSION['data'] = $_POST;
at the beginning of dbinsert.php and then using $fcode = $_SESSION['data']['fcode']; on dbextract.php

Answer 2

To claryfy Twista's answer - The Minimal, Complete, and Verifiable example would probably look like the example below.
NOTE:
I pretty much excluded everything that was causing any sort of errors, i also omitted the actual database insertion, since it doesn't really relate to the problem.
Judging by provided code the was actually one big problem:
Undefined indexes. Judging by provided code dbinsert.php has a lot of them. $acre = $_POST['acre'] and every $_POST[] after it should yeild Warning: Undefined index.
dbextract.php also has a very invalid SQL Query. It probably should have being SELECT * FROM forminfo WHERE fcode='$fcode'.
Actually it would be better if you used MySQLi Prepared Statements
The example below demonstrates working with $_SESSION.
dataentryform.php
<form method="post" action="dbinsert.php">
<table width="650" border="1" class="table1">
<tbody>
<tr>
<td class="label">Farmer's Code</td>
<td width="350" colspan="2"><input type="text" name="fcode" class="text" autocomplete="off" required></td>
</tr>
<tr>
<td class="label">Farmer Name</td>
<td width="350" colspan="2"><input type="text" name="fname" class="text" autocomplete="off" required></td>
</tr>
<tr>
<td class="label">Village/ Town</td>
<td colspan="2"><input type="text" name="village" class="text" autocomplete="off" required></td>
</tr>
<tr>
<td class="label">Survey Number</td>
<td width="350" colspan="2"><input type="text" name="surnum" class="text" autocomplete="off" required></td>
</tr>
<tr>
<td class="label">Plot Number</td>
<td width="350" colspan="2"><input type="text" name="plotnum" class="text" autocomplete="off" required></td>
</tr>
...
...
...
...
...
...
...
...
...
...
...
...
<tr>
<td class="label">Potash (Tons/Acre)</td>
<td width="350" colspan="2"><input type="number" name="potash" class="range" min="0" step="0.001" autocomplete="off" required></td>
</tr>
</tbody>
</table>
<button type="submit" name="submit" class="submit">Submit</button>
</form>
dbinsert.php
<?php
session_start();
// include 'dbconnect.php';
$fcode = $_POST['fcode'];
$fname = $_POST['fname'];
$village = $_POST['village'];
$surnum = $_POST['surnum'];
$plotnum = $_POST['plotnum'];
$_SESSION['fcode']=$fcode;
// $sql = "INSERT INTO forminfo (fcode,fname,village,surnum,plotnum,acre,gunta,soiltype,wtrsrc,factory,labnum,
// nextcrop,coldate,gendate,season,taryield,nitro,phos,potash)
// VALUES ('$fcode','$fname','$village','$surnum','$plotnum','$acre','$gunta','$soiltype','$wtrsrc','$factory','$labnum',
// '$nextcrop','$coldate','$gendate','$season','$taryield','$nitro','$phos','$potash');";
// mysqli_query($conn, $sql);
header('location: dbextract.php');
?>
dbextract.php
<?php
//session_start();
// include 'dbconnect.php';
$fcode = $_SESSION['fcode'];
//$fcode = $_GET['fcode'];
var_dump($fcode);
// $sql = "SELECT * FROM forminfo WHERE fcode=['$fcode']";
// $result = mysqli_query($conn, $sql);
// $row = mysqli_fetch_array($result);
?>
The same can be done without the use of $_SESSION. dataentryform.php stays the same.
dbinsert.php
<?php
//session_start();
// include 'dbconnect.php';
$fcode = $_POST['fcode'];
$fname = $_POST['fname'];
$village = $_POST['village'];
$surnum = $_POST['surnum'];
$plotnum = $_POST['plotnum'];
//$_SESSION['fcode']=$fcode;
// $sql = "INSERT INTO forminfo (fcode,fname,village,surnum,plotnum,acre,gunta,soiltype,wtrsrc,factory,labnum,
// nextcrop,coldate,gendate,season,taryield,nitro,phos,potash)
// VALUES ('$fcode','$fname','$village','$surnum','$plotnum','$acre','$gunta','$soiltype','$wtrsrc','$factory','$labnum',
// '$nextcrop','$coldate','$gendate','$season','$taryield','$nitro','$phos','$potash');";
// mysqli_query($conn, $sql);
header('location: dbextract.php/?fcode='.$fcode);
?>
dbextract.php
<?php
//session_start();
// include 'dbconnect.php';
//$fcode = $_SESSION['fcode'];
$fcode = $_GET['fcode'];
var_dump($fcode);
// $sql = "SELECT * FROM forminfo WHERE fcode=['$fcode']";
// $result = mysqli_query($conn, $sql);
// $row = mysqli_fetch_array($result);
?>
The above shows that it can be done without $_SESSION. The thing that happens in this exaple is that you pass your desired value as a param. Then the GET request happens, and then you use $_GET['fcode'] to get your value.
!!!IMPORTANT!!!
The exapmles above, are just that - examples. You will likely have to customise them a bit to suit your needs. For instance - you will have to actually un-comment parts, that are working with database and re-write them a bit.
Consearning sending data with a single POST request to several different .php files - On the server side as far as i am aware a single POST request sends data to a single file. Note it is possible to send several POST request using AJAX, but AJAX works on client side, so AJAX won't be of assistance if a redirect happens at server side.