php-demo-project/file_upload.php at main · nbvan239/php-demo-project · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
<?php
    echo "File upload in PHP";
    if(isset($_POST['submit'])) {
        $permitted_extensions = ['png', 'jpg', 'jpeg', 'gif'];
        $file_name = $_FILES['upload']['name'];
        if(!empty($file_name)) {
            //print_r($_FILES);
            $file_size = $_FILES['upload']['size'];
            $file_tmp_name = $_FILES['upload']['tmp_name'];
            $generated_file_name = time().'-'.$file_name;
            $destination_path = "uploads/${generated_file_name}";
            $file_extension = explode('.', $file_name);
            $file_extension = strtolower(end($file_extension));
            //echo "$file_name, $file_size, $file_extension, $destination_path";
            //validate file extension permitted
            if(in_array($file_extension, $permitted_extensions)) {
                if($file_size <= 1000000) {
                    //ok, move from temp folder to /uploads
                    //original file name and uploaded file name
                    //must be DIFFERENT !, why ?
                    move_uploaded_file($file_tmp_name, $destination_path);
                    $message = '<p style="color:green;">
                        File is uploaded</p>';
                } else {
                    $message = '<p style="color:red;">
                        File is too big</p>';
                }
            } else {
                $message = '<p style="color:red;">
                        Invalid file type</p>';
            }
        } else {
            $message = '<p style="color:red;">
                No file selected, please try again</p>';
        }
    }
?>
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <h1>File upload in PHP</h1>
    <form action="<?php echo $_SERVER['PHP_SELF']; ?>"
        method="post"
        enctype="multipart/form-data"
        >
        Choose your image to upload
        <input type="file" name="upload">
        <input type="submit" value="submit" name="submit">
    </form>
    <?php echo $message ?? '' ?>
</body>
</html>