What potential pitfalls should be considered when upgrading to PHP8?

One potential pitfall when upgrading to PHP8 is that certain deprecated features or functions may have been removed, causing compatibility issues with older code. To address this, it is important to thoroughly review the PHP migration guide and update any deprecated code to use the recommended alternatives. 

// Before upgrading to PHP8, review your code for any deprecated features
// Update deprecated code to use the recommended alternatives

// Example of updating deprecated function (e.g. implode() with array)
$items = ['apple', 'banana', 'orange'];
$comma_separated = implode(', ', $items); // Deprecated in PHP8
$comma_separated = implode(', ', $items); // Recommended alternative

Keywords

backward compatibility deprecated features performance impact syntax changes error handling

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