From cd7d5314da3bd92580d4a1700df0f7e375c639be Mon Sep 17 00:00:00 2001
From: James Titcumb <james@asgrim.com>
Date: Wed, 21 Oct 2026 20:12:18 +0100
Subject: [PATCH 1/2] 780: handle --with-php-path and --with-php-config
 properly fallback

---
 src/Command/CommandHelper.php                | 10 +++---
 test/integration/Command/ShowCommandTest.php | 34 ++++++++++++++++++++
 2 files changed, 38 insertions(+), 6 deletions(-)

diff --git a/src/Command/CommandHelper.php b/src/Command/CommandHelper.php
index 3d0f0254..d47c9525 100644
--- a/src/Command/CommandHelper.php
+++ b/src/Command/CommandHelper.php
@@ -197,8 +197,6 @@ public static function validateInput(InputInterface $input, Command $command): v
 
     public static function determineTargetPlatformFromInputs(InputInterface $input, IOInterface $io): TargetPlatform
     {
-        $phpBinaryPath = PhpBinaryPath::fromCurrentProcess();
-
         /** @var mixed $withPhpConfig */
         $withPhpConfig          = $input->getOption(self::OPTION_WITH_PHP_CONFIG);
         $specifiedWithPhpConfig = is_string($withPhpConfig) && $withPhpConfig !== '';
@@ -214,12 +212,12 @@ public static function determineTargetPlatformFromInputs(InputInterface $input,
             throw new InvalidArgumentException('The --with-php-path=/path/to/php cannot be used on non-Windows, use --with-php-config=/path/to/php-config instead.');
         }
 
-        if ($specifiedWithPhpConfig) {
-            $phpBinaryPath = PhpBinaryPath::fromPhpConfigExecutable($withPhpConfig);
-        }
-
         if ($specifiedWithPhpPath) {
             $phpBinaryPath = PhpBinaryPath::fromPhpBinaryPath($withPhpPath);
+        } elseif ($specifiedWithPhpConfig) {
+            $phpBinaryPath = PhpBinaryPath::fromPhpConfigExecutable($withPhpConfig);
+        } else {
+            $phpBinaryPath = PhpBinaryPath::fromCurrentProcess();
         }
 
         $makeParallelJobs = null; /** `null` means {@see TargetPlatform} will try to auto-detect */
diff --git a/test/integration/Command/ShowCommandTest.php b/test/integration/Command/ShowCommandTest.php
index c097b402..d039a388 100644
--- a/test/integration/Command/ShowCommandTest.php
+++ b/test/integration/Command/ShowCommandTest.php
@@ -4,6 +4,7 @@
 
 namespace Php\PieIntegrationTest\Command;
 
+use Composer\Util\Platform;
 use InvalidArgumentException;
 use Php\Pie\Command\InstallCommand;
 use Php\Pie\Command\ShowCommand;
@@ -17,9 +18,14 @@
 use Webmozart\Assert\Assert;
 
 use function get_loaded_extensions;
+use function getenv;
 use function phpversion;
+use function Safe\putenv;
 use function str_contains;
+use function sys_get_temp_dir;
 
+use const DIRECTORY_SEPARATOR;
+use const PHP_BINARY;
 use const PHP_VERSION_ID;
 
 #[CoversClass(ShowCommand::class)]
@@ -50,6 +56,34 @@ public function testExecute(): void
         }
     }
 
+    public function testExecuteWithExplicitTargetPhpWhenRunningPhpCannotBeFound(): void
+    {
+        if (Platform::isWindows()) {
+            $targetPhpOption = ['--with-php-path' => PHP_BINARY];
+        } else {
+            try {
+                $phpConfig = Process::run(['which', 'php-config']);
+                Assert::stringNotEmpty($phpConfig);
+            } catch (ProcessFailedException | InvalidArgumentException) {
+                self::markTestSkipped('This test can only run on systems with php-config');
+            }
+
+            $targetPhpOption = ['--with-php-config' => $phpConfig];
+        }
+
+        $originalPhpBinaryEnv = getenv('PHP_BINARY');
+        putenv('PHP_BINARY=' . sys_get_temp_dir() . DIRECTORY_SEPARATOR . 'php-that-does-not-exist');
+
+        try {
+            $this->commandTester->execute($targetPhpOption);
+        } finally {
+            putenv($originalPhpBinaryEnv === false ? 'PHP_BINARY' : 'PHP_BINARY=' . $originalPhpBinaryEnv);
+        }
+
+        $this->commandTester->assertCommandIsSuccessful();
+        self::assertStringContainsString('Target PHP installation:', $this->commandTester->getDisplay());
+    }
+
     public function testExecuteWithAvailableConstrainedUpdates(): void
     {
         if (PHP_VERSION_ID >= 80500) {

From 70a13dcec17e28b0fb171818e90f3fdcc010cd28 Mon Sep 17 00:00:00 2001
From: James Titcumb <james@asgrim.com>
Date: Wed, 21 Oct 2026 20:19:06 +0100
Subject: [PATCH 2/2] 780: backport ea76188 to fix isRunningStaticPhp() check

---
 src/Platform.php | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/Platform.php b/src/Platform.php
index e2a3f778..31a73604 100644
--- a/src/Platform.php
+++ b/src/Platform.php
@@ -22,6 +22,7 @@
 
 use const DIRECTORY_SEPARATOR;
 use const PHP_BUILD_PROVIDER;
+use const PHP_SAPI;
 use const STDIN;
 
 /** @internal This is not public API for PIE, so should not be depended upon unless you accept the risk of BC breaks */
@@ -135,6 +136,6 @@ public static function getPieJsonFilename(TargetPlatform $targetPlatform): strin
 
     public static function isRunningStaticPhp(): bool
     {
-        return defined('PHP_BUILD_PROVIDER') && str_contains(PHP_BUILD_PROVIDER, 'static-php-cli');
+        return PHP_SAPI === 'micro' || (defined('PHP_BUILD_PROVIDER') && str_contains(PHP_BUILD_PROVIDER, 'static-php-cli'));
     }
 }