How can HTML be integrated with PHP to display and save images simultaneously?

To display and save images simultaneously using HTML and PHP, you can create a form in HTML to upload the image file, then use PHP to process the file upload, save it to a directory on the server, and display it back to the user.

<?php
if(isset($_FILES['image'])){
    $file_name = $_FILES['image']['name'];
    $file_tmp = $_FILES['image']['tmp_name'];
    move_uploaded_file($file_tmp, "images/".$file_name);
    echo "Image uploaded successfully!<br>";
    echo "<img src='images/".$file_name."' alt='uploaded image'>";
}
?>

<!DOCTYPE html>
<html>
<body>

<form action="" method="post" enctype="multipart/form-data">
    Select image to upload:
    <input type="file" name="image" id="image">
    <input type="submit" value="Upload Image" name="submit">
</form>

</body>
</html>