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PHP 8.4 introduces an engine optimization that converts calls to `sprintf()` with certain placeholders directly into string interpolation. This improvement reduces the overhead of function calls and enhances overall performance by optimizing frequently used format strings commonly found in PHP codebases.

New in PHP 8.4: engine optimization of sprintf() to string interpolation

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For PHP 8.4 Tideways sponsored the work of our colleague Tim to add another compiler optimization for the function sprintf().

If you call the function with a format string containing only %s placeholders the engine will compile the call to sprintf() directly into the equivalent string interpolation, removing the overhead of the function call and avoiding repeatedly parsing the format string.

<p>For PHP 8.4 Tideways sponsored the work of our colleague Tim to add another compiler optimization for the function sprintf().

If you call the function with a format string containing only %s placeholders the engine will compile the call to sprintf() directly into the equivalent string interpolation, removing the overhead of the function call and avoiding repeatedly parsing the format string.</p>