Apply patch files to your code. Really helpful to apply changes to existing libraries, which you may use via composer.

apply-patches.php

<?php

declare(strict_types=1);

$baseDir = \dirname(__DIR__);
$directoryIterator = new DirectoryIterator($baseDir . '/patches');
$patchLevels = ['-p1', '-p0', '-p2', '-p4'];

foreach ($directoryIterator as $fileInfo) {
    if ($fileInfo->getExtension() !== 'patch') {
        continue;
    }

    foreach ($patchLevels as $patchLevel) {
        $commandCheck = sprintf('git apply --check %s %s', $patchLevel, $fileInfo->getPathname());
        $commandReal = sprintf('git apply %s %s', $patchLevel, $fileInfo->getPathname());
        $output = [];

        exec($commandCheck, $output, $resultCode);

        if ($resultCode !== 0) {
            echo sprintf('Check "%s" failed! ... skipping', $commandCheck) . \PHP_EOL;

            continue;
        }

        echo sprintf('Check "%s" succeed! ... start patching', $commandCheck) . \PHP_EOL;
        exec($commandReal, $output, $resultCode);

        if ($resultCode !== 0) {
            echo sprintf('Patch "%s" failed!', $commandReal) . \PHP_EOL;
            echo print_r($output, true) . \PHP_EOL;

            break;
        }

        echo 'Patch "%s" successfully applied!', $commandReal . \PHP_EOL;

        break;
    }
}