feat: Allow to pass host as the used PHP version (#1052)

Author: theofidry

src/Console/InputOption/PhpVersionInputOption.php

@@ -34,7 +34,7 @@ public static function createInputOption(): InputOption
             self::PHP_VERSION_OPT,
             null,
             InputOption::VALUE_REQUIRED,
-            'PHP version in which the PHP parser and printer will be configured, e.g. "7.2".',
+            'PHP version in which the PHP parser and printer will be configured, e.g. "7.2", or "host" for the current PHP version.',
         );
     }
 
@@ -44,6 +44,10 @@ public static function getPhpVersion(IO $io): ?PhpVersion
             ->getTypedOption(self::PHP_VERSION_OPT)
             ->asNullableString();
 
+        if ('host' === $version) {
+            return PhpVersion::getHostVersion();
+        }
+
         return null === $version
             ? $version
             : PhpVersion::fromString($version);

tests/Console/InputOption/PhpVersionInputOptionTest.php

@@ -47,6 +47,11 @@ public static function provideInput(): iterable
             self::createIO('8.2'),
             PhpVersion::fromComponents(8, 2),
         ];
+
+        yield [
+            self::createIO('host'),
+            PhpVersion::fromComponents(PHP_MAJOR_VERSION, PHP_MINOR_VERSION),
+        ];
     }
 
     private static function createIO(?string $value): IO