What are some potential risks or conflicts that may arise when switching between different versions of PHP in a development environment?

When switching between different versions of PHP in a development environment, potential risks or conflicts may arise due to differences in syntax, deprecated functions, or changes in behavior between versions. To mitigate these risks, it is important to thoroughly test the code on each PHP version and make necessary adjustments to ensure compatibility. 

// Example code snippet to check for PHP version and handle deprecated functions
if (version_compare(PHP_VERSION, '7.0.0', '<')) {
    // Handle deprecated functions or syntax for PHP versions below 7.0.0
} else {
    // Code that is compatible with PHP 7.0.0 and above
}

Keywords

backward compatibility deprecated features syntax errors incompatibility security vulnerabilities

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