Create a new HTML page and add content using PHP - php

Question

I am trying to create new page (file) using PHP.
I have opened and created the page and I have add it content from MySQL but I couldn't get id variable from the previous page.
My admin panel is like this:
<?php
if(isset($_POST['sayfaekle'])) {
$baslik = $_POST['baslik'];
$text = $_POST['editor1'];
$sql = "INSERT INTO sayfa (sayfa_baslik , sayfa_text) VALUES ('$baslik' , '$text')";
$db->exec($sql);
$id=$db->lastInsertId();
echo "basarılı";
include "sayfagonder.php";
}
?>
In here, I get baslik and yazi and insert into database successfully. I also get id successfully.
In other page that creates a new PHP page codes are like this:
<?php
$_GET['id'] = $id;
ini_set('display_errors','0');
error_reporting(0);
$pagename = '../'.$baslik. '.php' ;
$myfile = fopen( $pagename , "w");
$text = ' <?php
include "config.php";
$id = $_GET["id"];
echo $id;
$sayfasor=$db->prepare("select * from sayfa where sayfa_id=$id");
$sayfasor->execute(array(0));
$sayfacek=$sayfasor->fetch(PDO::FETCH_ASSOC);
include "header.php";
?>
<div class="content">
<div class="row">
<div class="pageana">
<div class="col-sm-8">
<h1><?php echo $sayfacek["sayfa_baslik"]; ?></h1>
<?php echo $sayfacek["sayfa_text"]; ?>
</div>
</div>
</div>
</div>
</div>
<?php
include "footer.php";
?> ';
fwrite($myfile , $text);
fclose($myfile);
?>
And I get this error:
Notice: Undefined index: id in C:\xampp\htdocs\doktor\deneme56.php on line 5
I can't get the value of id..

Answer 1

You are fetching the value of $id but that value is not persisting. Set the value in a php $_SESSION variable then access it on new page. Something like this -
<?php
session_start();
if(isset($_POST['sayfaekle'])) {
$baslik = $_POST['baslik'];
$text = $_POST['editor1'];
$sql = "INSERT INTO sayfa (sayfa_baslik , sayfa_text) VALUES ('$baslik' , '$text')";
$db->exec($sql);
$id=$db->lastInsertId();
$_SESSION['id'] = $id;
echo "basarılı";
include "sayfagonder.php";
}
?>
Now you can access this value on new page like this -
<?php
session_start();
$_GET['id'] = $_SESSION['id'];
ini_set('display_errors','0');
error_reporting(0);
$pagename = '../'.$baslik. '.php' ;
$myfile = fopen( $pagename , "w");
$text = ' <?php
include "config.php";
$id = $_GET["id"];
echo $id;
$sayfasor=$db->prepare("select * from sayfa where sayfa_id=$id");
$sayfasor->execute(array(0));
$sayfacek=$sayfasor->fetch(PDO::FETCH_ASSOC);
include "header.php";
?>
<div class="content">
<div class="row">
<div class="pageana">
<div class="col-sm-8">
<h1><?php echo $sayfacek["sayfa_baslik"]; ?></h1>
<?php echo $sayfacek["sayfa_text"]; ?>
</div>
</div></div>
</div>
</div>
<?php
include "footer.php";
?> ';
fwrite($myfile , $text);
fclose($myfile);
?>
Now coming to your code. When you already have value in Session variable you don't need to assign in $_GET variable. Access it directly.