Upload d'image undefined index

Bonjour j'essaye de faire un système d'upload d'image grâce à l'id du produit PHPmyadmin mais les erreurs suivantes me bloquent:

Notice: Undefined index: img in C:\wamp64\www\Ben&co\admin\admin.php on line 28

Notice: Undefined index: img in C:\wamp64\www\Ben&co\admin\admin.php on line 29

Le point en question:

$title = $_POST['title'];
$description = $_POST['description'];
$price = $_POST['price'];       
$img = $_POST['img'];
$img = $_FILES['img']['name'];       //erreur 1
$img_tmp = $_FILES['img']['tmp_name']; //erreur 2

Le script complet:

<?php
session_start();
?>


<link rel="stylesheet" href="../style/bootstrap.css"/>
<h1>Bienvenue, <?php echo $_SESSION['username']; ?></h1>
<br/>
<a href="?action=add">Ajouter un produit</a>
<a href="?action=modifyanddelete">Modifier / Supprimer un produit</a><br/><br/>



<?php

if(isset($_SESSION['username'])){
if(isset($_GET['action'])){
if($_GET['action']=='add'){


if(isset($_POST['submit'])){


$title = $_POST['title'];
$description = $_POST['description'];
$price = $_POST['price'];
$img = $_POST['img'];
$img = $_FILES['img']['name'];
$img_tmp = $_FILES['img']['tmp_name'];

if(!empty($img_tmp)){

$image = explode('.',$img);

$image_ext = end($image);

if(in_array(strtolower($image_ext), array('png','jpg','jpeg'))===false){

    echo'Veuillez rentrer une image ayant pour extension : png, jpg, jpeg';  
}else{
    
    $picture = $title . ".jpg";
    move_uploaded_file( $_FILES['img']['tmp_name'], "img/" . $picture);

    if($image_size['mime']=='image/jpeg'){
        
        $image_src = imagecreatefromjpeg($img_tmp);
    
    }else if($image_size['mime']=='image/png'){
        
        $image_src = imagecreatefrompng($img_tmp);
    }else{

        $image_src = false;
        echo'Veuillez rentrer une image valide';
    }

    if($image_src!==false){

        $image_width=200;

        if($image_size[0]==$image_width){

        $image_finale = $image_src;
        
        }else{

            $new_width[0]=$image_width;

            $new_height = 200;

            $image_finale = imagecreatetruecolor($new_width[0],$new_height[1]);

            imagecopyresampled($image_finale,$image_src,0,0,0,0,$new_width[0],$new_height[1],$image_size[0],$image_size[1]);

        }

        imagejpeg($image_finale,'imgs/'.$title.'.jpg');
    }


}

}else{

    echo'Veuillez rentrer une image';
}

if ($title&&$description&&$price){

try 
{
$db = new PDO('mysql:host=localhost;dbname=ben&co', 'root','');
$db->setAttribute(PDO::ATTR_CASE, PDO::CASE_LOWER);
$db->setAttribute(PDO::ATTR_ERRMODE , PDO::ERRMODE_EXCEPTION);
}
catch(Exception $e){

echo'une erreur est survenue'; 
die();

}
$insert = $db->prepare("INSERT INTO products (title, description, price) VALUES('$title', '$description', '$price')");
$insert->execute();

}else{
echo'Veuillez remplir tous les champs';

}

}

?>

<form action="" method="post" enctype="multipart/form-data  ">
<h3>Titre du produit :</h3><input type="text" name="title"/>
<h3>Description du produit :</h3><textarea type="text" name="description"></textarea>
<h3>Prix :</h3><input type="text" name="price"/><br/><br/>
<input type="file" name='img'/><br/><br/>
<input type="submit" name='submit'>
</form>


<?php

}else if($_GET['action']=='modifyanddelete'){

$db = new PDO('mysql:host=localhost;dbname=ben&co', 'root',''); $select = $db->prepare("SELECT * FROM products");
$select->execute();

while($s=$select->fetch(PDO::FETCH_OBJ)){
    echo $s->title;
    ?>
    <a href="?action=modify&amp;id=<?php echo $s->id; ?>">Modifier</a>
    <a href="?action=delete&amp;id=<?php echo $s->id; ?>">Supprimer</a><br/><br/>
    <?php
}

}else if($_GET['action']=='modify'){

    $id=$_GET['id'];
    $db = new PDO('mysql:host=localhost;dbname=ben&co', 'root','');    $select = $db->prepare("SELECT * FROM products WHERE id=$id");
    $select->execute();

    $data = $select->fetch(PDO::FETCH_OBJ);

    ?>


    <form action="" method="post">
    <h3>Titre du produit :</h3><input value="<?php echo $data->title; ?>" type="text" name="title"/>
    <h3>Description du produit :</h3><textarea type="text" name="description"><?php echo $data->description; ?></textarea>
    <h3>Prix :</h3><input value="<?php echo $data->price; ?>" type="text" name="price"/><br/><br/>
    <input type="submit" name="submit" value="Modifier"/>
    </form>


    <?php


    if(isset($_POST['submit'])){

        $title=$_POST['title'];
        $description=$_POST['description'];
        $price=$_POST['price'];

        $db = new PDO('mysql:host=localhost;dbname=ben&co', 'root','');   $update = $db->prepare("UPDATE products SET title='$title' ,description='$description' ,price='$price' WHERE id=$id");
        $update->execute();

        header('location: admin.php?action?==modifyanddelete');
    }




}else if($_GET['action']=='delete'){

    $id=$_GET['id'];
    $db = new PDO('mysql:host=localhost;dbname=ben&co', 'root','');    $select = $db->prepare("DELETE FROM products WHERE id=$id");
    $select->execute();


}else{

die('une erreur s\'est produite.');

}
}else{


}
}else{

header('Location: ../index.php');


}



?>

J'espère que vous trouverez une solution merci d'avance

BenjaminBilon

13 juin 2021 à 16:39:10