What are common issues that can arise when running a PHP script on different environments, such as a local laptop setup versus an online server?

One common issue is differences in PHP versions between the local setup and online server. To solve this, ensure that the PHP version on both environments is compatible with the script being run. 

// Check PHP version compatibility
if (version_compare(PHP_VERSION, '7.0.0') < 0) {
    die('PHP version 7.0.0 or higher is required');
}

Keywords

Environment variables PHP configuration file paths database connections server settings

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