retaining input value after refresh in php

I am trying to retain the value of the input if the form refresh with the earlier input the user filled in. But every time i make error and the page refresh still comes back empty.

if ( isset($_POST['make']) && isset($_POST['model']) && isset($_POST['year']) && isset($_POST['mileage'])){
if(strlen($_POST['make']) < 1 || strlen($_POST['model']) < 1 || strlen($_POST['year']) < 1 || strlen($_POST['mileage']) < 1){
$_SESSION["error"] = "All values are required";
header('Location: add.php');
return;
}


from here i tried to pass the post make value to the session as a parameter but, it didn't work either!

elseif (strlen($_POST['make']) < 1 ){
$_SESSION["error"] = "Make is required.";
$_SESSION['make'] = $_POST['make'];
header("Location: add.php?make=".$_POST['make']);
return;
}


Then i pass it as part of the url on refresh as and used a global get value still didn't work either!

else if (strlen($_POST['model']) < 1 ){
$_SESSION["error"] = "Model is required.";
header("Location: add.php?model=".$_POST['model']);
return;
}
else if(strlen($_POST['year']) < 1 ){
$_SESSION["error"] = "Year is required.";
header("Location: add.php?year=".$_POST['year']);
return;
}
else if( strlen($_POST['mileage']) < 1){
$_SESSION["error"] = "Mileage is required.";
header("Location: add.php?mileage=".$_POST['mileage']);
return;
}
else if (!is_numeric($_POST['year']) || !is_numeric($_POST['mileage'])){
$_SESSION["error"] = "Mileage and year must be numeric";
header('Location: add.php');
return;
}else {
$sql = "INSERT INTO autos (make, model, year, mileage)
VALUES (:make, :model, :year, :mileage)";
// // echo("<pre>n".$sql."n</pre>n");
// $opt = "Record Inserted";
$stmt = $pdo->prepare($sql);
$stmt->execute(array(
':make' => $_POST['make'],
':model' => $_POST['model'],
':year' => $_POST['year'],
':mileage' => $_POST['mileage']));
}
$_SESSION["success"] = "added";
header('Location: view.php');
return;
}


Then i changed it here to listen for the submit and when the submit is set all value of post should be passed as session value but, still come empty.

if (isset($_POST['submit'])) {
$_SESSION['make'] = $_POST['make'];
$_SESSION['model'] = $_POST['model'];
$_SESSION['year'] = $_POST['year'];
$_SESSION['mileage'] = $_POST['mileage'];
}
?>



<?php
if ( isset($_SESSION["error"]) ) {
echo('<p style="color:red">'.$_SESSION["error"]."</p>n");
unset($_SESSION["error"]);
}
?>
<br>
<p>Adding A New Auto</p>
<form id="autoAdd" method="post">
<p>Make:


I then check if the get is set and try to pass it to the value and if not it should output the input without value.

<?php
if(isset($_GET['make'])) {
// $make = $_GET['make'];
$make = htmlentities($_SESSION['make']);
echo '<input type="text" name="make" size="40" value="'.$make.'">';
}
else{
echo '<input type="text" name="make" size="40">';
}
?>
</p>
<p>Model:


I then check if the get is set and try to pass it to the value and if not it should output the input without value.

<?php
if(isset($_GET['model'])) {
$model = $_GET['model'];
echo '<input type="text" name="model" size="40" value="'.$model.'">';
}
else{
echo '<input type="text" name="model" size="40">';
}
?>
</p>
<p>Year:


I then check if the get is set and try to pass it to the value and if not it should output the input without value.

<?php
if(isset($_GET['year'])) {
$year = $_GET['year'];
echo '<input type="text" name="year" size="40" value="'.$year.'">';
}
else{
echo '<input type="text" name="year" size="40">';
}
?>
</p>
<p>Mileage:


I then check if the get is set and try to pass it to the value and if not it should output the input without value.

<?php
if(isset($_GET['mileage'])) {
$mileage = $_GET['mileage'];
echo '<input type="text" name="mileage" size="40" value="'.$mileage.'">';
}
else{
echo '<input type="text" name="mileage" size="40">';
}
?>
</p>
<button type="submit" value="Add">Add</button>


research $_SESSION
– ThisGuyHasTwoThumbs
Jun 28 at 12:33

$_SESSION

that guy has no subject related to what i am looking for! ??
– R.Ovis
Jun 28 at 14:16

retaining input value after refresh in php -> page title, did you read what a $_SESSION does?
– ThisGuyHasTwoThumbs
Jun 28 at 14:16

retaining input value after refresh in php

$_SESSION

haven't you seen how i pass the error back tot the same page after refresh? i tried that it didn't work
– R.Ovis
Jun 28 at 14:18

but if you change from $_GET to $_SESSION you no longer need $_GET. You just use $_POST (as is standard nowadays) and then set the data with $_SESSION and if isset $_SESSION['error'], echo?
– ThisGuyHasTwoThumbs
Jun 28 at 14:20

$_GET

$_SESSION

$_GET

$_POST

$_SESSION

isset $_SESSION['error']

echo

1 Answer
1

I got it!!
I created variables and pass the Global POST as their values like this:

$make = $_POST['make'];


And then changed the header and the condition test cases as follows:

if(strlen($make) < 1 ){
$_SESSION["error"] = "Make is required.";
header("Location: add.php?autosInput=mileage&make=$make&model=$model&year=$year&mileage=$mileage");

return;
}


And left the input side with the $GET as usual that does the magic

$GET

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