In what ways can browser compatibility or caching affect the functionality of PHP scripts that involve uploading and processing images?

Browser compatibility can affect the functionality of PHP scripts that involve uploading and processing images if certain browsers do not support the features being used. Additionally, caching can cause issues if the browser or server is caching outdated versions of the script or images. To solve these issues, it is important to test the script in multiple browsers and clear the cache regularly to ensure that the most up-to-date version of the script is being used. 

<?php
// Disable caching
header("Cache-Control: no-cache, must-revalidate"); // HTTP/1.1
header("Expires: Sat, 26 Jul 1997 05:00:00 GMT"); // Date in the past

// Check for browser compatibility
if(strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE') !== false) {
    // Handle Internet Explorer specific code
} else {
    // Handle other browsers
}
?>

Keywords

Browser compatibility caching PHP scripts image uploading image processing

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