The following code is a sample to upload a file.

Create a folder name "upload".

Save the following codes into "upload.php".

<?php
//create 'upload' directory if not yet created
if (!is_dir('upload')) {
    mkdir('upload', 0777, true);
}
$target_file = "upload/".$_FILES["fileToUpload"]["name"];
//$target_file can be saved into database table to relate to specific user data
 
if (move_uploaded_file($_FILES["fileToUpload"]["tmp_name"], $target_file)) {
 echo "The file ". basename( $_FILES["fileToUpload"]["name"]). " has been uploaded.";
 echo "<a href='$target_file'></a>";
} else {
 echo "Sorry, there was an error uploading your file.";
}
?>
 
<form action="upload.php" method="post" enctype="multipart/form-data">
 Select image to upload:
 <input type="file" name="fileToUpload" id="fileToUpload">
 <input type="submit" value="Upload Image" name="submit">
</form>