What potential issues could arise when uploading and resizing images in PHP, especially when transitioning from a local server to a live web server?

One potential issue that could arise when uploading and resizing images in PHP is the difference in file paths between a local server and a live web server. To solve this, you can use the `$_SERVER['DOCUMENT_ROOT']` variable to get the root directory of the server and construct the correct file path. 

// Get the root directory of the server
$root = $_SERVER['DOCUMENT_ROOT'];

// Construct the file path for the uploaded image
$upload_path = $root . '/uploads/';

// Use the $upload_path variable when saving the uploaded image

Keywords

file upload image resizing PHP GD library memory limit server configuration

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