How can the code provided be improved to efficiently generate and save multiple thumbnails from a directory of images?

The code can be improved by iterating over all the images in a directory, generating thumbnails for each image, and saving them to a specified location. This can be achieved by using a loop to go through each image file, resizing it to a thumbnail size, and saving the thumbnail with a unique name. 

<?php
// Specify the directory containing the images
$directory = 'path/to/images/';

// Specify the directory where thumbnails will be saved
$thumbnailDirectory = 'path/to/thumbnails/';

// Get all files in the directory
$files = glob($directory . '*');

// Loop through each file
foreach ($files as $file) {
    // Get the image dimensions
    list($width, $height) = getimagesize($file);

    // Set the thumbnail size
    $thumbWidth = 100;
    $thumbHeight = 100;

    // Create a new image from file
    $image = imagecreatefromjpeg($file);

    // Create a new true color image
    $thumb = imagecreatetruecolor($thumbWidth, $thumbHeight);

    // Resize the image to thumbnail size
    imagecopyresized($thumb, $image, 0, 0, 0, 0, $thumbWidth, $thumbHeight, $width, $height);

    // Save the thumbnail to the specified directory
    imagejpeg($thumb, $thumbnailDirectory . basename($file));

    // Free up memory
    imagedestroy($image);
    imagedestroy($thumb);
}
?>

Keywords

image processing thumbnail generation directory traversal file handling image saving

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