How can developers optimize their code for both PHP 5.3 and newer versions to ensure broad compatibility?

Developers can optimize their code for both PHP 5.3 and newer versions by using conditional checks to determine which version of PHP is being used and adjusting the code accordingly. This can involve checking for the availability of certain functions or features in each version and using alternatives when necessary. 

if (version_compare(PHP_VERSION, '5.3.0', '>=')) {
    // Code optimized for PHP 5.3 and newer versions
    // Use newer functions or features
} else {
    // Code optimized for PHP versions older than 5.3
    // Use alternative functions or features
}

Keywords

PHP 5.3 backward compatibility code optimization PHP functions error handling

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