foal finds lines of code that are eliminated by OpCache's bytecode optimizer.
The recommended way to use this tool is a PHP Archive (PHAR):
$ wget https://phar.phpunit.de/foal.phar
$ php foal.phar --versionFurthermore, it is recommended to use Phive for installing and updating the tool dependencies of your project.
example.php
<?php declare(strict_types=1);
function f()
{
$result = 'result';
return $result;
}$ php foal.phar example.php
foal 0.4.0 by Sebastian Bergmann.
1 <?php declare(strict_types=1);
2 function f()
3 {
- 4 $result = 'result';
5
6 return $result;
- 7 }
Lines prefixed with - were optimized away by the OpCache bytecode optimizer.
$ php foal.phar --paths example example/source.php
foal 0.4.0 by Sebastian Bergmann.
Wrote execution paths for example/source.php to example/unoptimized.dot
Wrote optimized execution paths for example/source.php to example/optimized.dot
$ dot -Tsvg -o example/unoptimized.svg example/unoptimized.dot
$ dot -Tsvg -o example/optimized.svg example/optimized.dot
| Before Bytecode Optimization | After Bytecode Optimization |
|---|---|
 |
 |