How can differences in PHP versions between local and online servers affect the functionality of a script?

Differences in PHP versions between local and online servers can affect the functionality of a script because certain functions or features may not be available in older versions. To solve this issue, it is important to ensure that the PHP version used in development matches the one on the production server. You can check the PHP version by creating a PHP file with phpinfo() function and accessing it through a web browser on both servers. 

<?php
// Check PHP version
echo phpversion();
?>

Keywords

PHP versions server configuration compatibility issues deprecated functions error messages

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