What should be considered when updating PHP versions for compatibility with existing scripts?

When updating PHP versions for compatibility with existing scripts, it is important to consider deprecated features, changes in syntax, and potential security vulnerabilities. It is recommended to review the PHP documentation for each version to identify any breaking changes and update the scripts accordingly. 

// Example code snippet for updating PHP version compatibility
// Before updating PHP version
$old_array_syntax = array('apple', 'banana', 'cherry');

// After updating PHP version
$new_array_syntax = ['apple', 'banana', 'cherry'];

Keywords

backward compatibility deprecated functions migration PHP extensions syntax changes

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