//This is the minimal code for an image upload for first time learners
//html portion
<!DOCTYPE html>
<html>
<head>
<title>ImageUpload</title>
</head>
<body>
<form action="upload.php" method="post" enctype="multipart/form-data">
<label>Username</label>
<input type="text" name="username">
<br>
<label>UploadImage</label>
<input type="file" name='myfile'>
<br/>
<input type="submit" value="upload">
</form>
</body>
</html>
//php portion
<?php
$user=$_POST['username'];
$image=$_FILES['myfile'];
echo "Hello $user <br/>";
echo "File Name<b>::</b> ".$image['name'];
move_uploaded_file($image['tmp_name'],"photos/".$image['name']);
//here the "photos" folder is in same folder as the upload.php,
//otherwise complete url has to be mentioned
?>
<?php
// connect to the database
$conn = mysqli_connect('localhost', 'root', '', 'file-management');
// Uploads files
if (isset($_POST['save'])) { // if save button on the form is clicked
// name of the uploaded file
$filename = $_FILES['myfile']['name'];
// destination of the file on the server
$destination = 'uploads/' . $filename;
// get the file extension
$extension = pathinfo($filename, PATHINFO_EXTENSION);
// the physical file on a temporary uploads directory on the server
$file = $_FILES['myfile']['tmp_name'];
$size = $_FILES['myfile']['size'];
if (!in_array($extension, ['zip', 'pdf', 'docx'])) {
echo "You file extension must be .zip, .pdf or .docx";
} elseif ($_FILES['myfile']['size'] > 1000000) { // file shouldn't be larger than 1Megabyte
echo "File too large!";
} else {
// move the uploaded (temporary) file to the specified destination
if (move_uploaded_file($file, $destination)) {
$sql = "INSERT INTO files (name, size, downloads) VALUES ('$filename', $size, 0)";
if (mysqli_query($conn, $sql)) {
echo "File uploaded successfully";
}
} else {
echo "Failed to upload file.";
}
}
}
if(isset($_FILES['image']))
{
$img_name = $_FILES['image']['name']; //getting user uploaded name
$img_type = $_FILES['image']['type']; //getting user uploaded img type
$tmp_name = $_FILES['image']['tmp_name']; //this temporary name is used to save/move file in our folder.
// let's explode image and get the last name(extension) like jpg, png
$img_explode = explode(".",$img_name);
$img_ext = end($img_explode); //here we get the extension of an user uploaded img file
$extension= ['png','jpeg','jpg','gif']; //these are some valid img extension and we are store them in array.