diff --git a/.github/workflows/windows-build.yml b/.github/workflows/windows-build.yml
index 9f364472..496a5e64 100644
--- a/.github/workflows/windows-build.yml
+++ b/.github/workflows/windows-build.yml
@@ -408,6 +408,50 @@ jobs:
               throw "Expected one Windows release package, found $($packages.Count)"
           }
 
+      - name: Verify portable Windows PHP configuration
+        if: startsWith(github.ref, 'refs/tags/') && matrix.php == '8.5'
+        shell: pwsh
+        run: |
+          $ErrorActionPreference = 'Stop'
+          $package = Get-ChildItem 'tpc_v*_windows_*.zip' -File | Select-Object -First 1
+          $destination = Join-Path $env:RUNNER_TEMP ('typephp-release-check-' + [guid]::NewGuid())
+          Expand-Archive -LiteralPath $package.FullName -DestinationPath $destination
+          $roots = @(Get-ChildItem $destination -Directory)
+          if ($roots.Count -ne 1) {
+              throw "Expected one release package directory, found $($roots.Count)"
+          }
+          $root = $roots[0].FullName
+          $phpExe = Join-Path $root 'php.exe'
+          $phpIni = Join-Path $root 'php.ini'
+          $checkFile = Join-Path $destination 'check-php-ini.php'
+          $check = @'
+          <?php
+          if (ini_get('extension_dir') !== './ext/' || !extension_loaded('zip')) {
+              fwrite(STDERR, "Invalid packaged extension configuration\n");
+              exit(1);
+          }
+          echo 'portable-php-ini-ok';
+          '@
+          [IO.File]::WriteAllText($checkFile, $check, [Text.UTF8Encoding]::new($false))
+          $previousScanDir = $env:PHP_INI_SCAN_DIR
+          try {
+              # Ignore the runner's extra ini files; test the relocated package.
+              $env:PHP_INI_SCAN_DIR = ''
+              foreach ($workingDirectory in @($root, $destination)) {
+                  Push-Location $workingDirectory
+                  try {
+                      $output = (& $phpExe -c $phpIni $checkFile 2>&1 | Out-String).Trim()
+                      if ($LASTEXITCODE -ne 0 -or $output -ne 'portable-php-ini-ok') {
+                          throw "Relocated PHP runtime validation failed in ${workingDirectory}: $output"
+                      }
+                  } finally {
+                      Pop-Location
+                  }
+              }
+          } finally {
+              $env:PHP_INI_SCAN_DIR = $previousScanDir
+          }
+
       - name: Upload Windows release package
         if: startsWith(github.ref, 'refs/tags/') && matrix.php == '8.5'
         uses: actions/upload-artifact@v4
diff --git a/package.php b/package.php
index 5d0e430c..f17b0356 100755
--- a/package.php
+++ b/package.php
@@ -228,6 +228,9 @@ PHPX_HOME must point to the bundled phpx directory. Its required files include:
     phpx\lib\phpx.lib
     phpx\src\misc
 
+The bundled php.ini uses extension_dir = "./ext/" instead of the CI runner's
+absolute extension path.
+
 TEXT;
 mustWriteFile($windowsSetupFile, $windowsSetup);
 
@@ -254,6 +257,18 @@ if (!is_dir($phpDir)) {
     // php8embed.lib 必须保留；部分 PHP SDK 仅在根目录提供该导入库。
     copyDirectory($phpDir, $topLevelDir, ['dev/php8ts.lib'], null, ['zip']);
 
+    // Do not ship setup-php's runner-specific C:\tools\php\ext setting.
+    // Rewrite only the staged copy; the CI installation remains untouched.
+    $packagedPhpIni = "{$topLevelDir}/php.ini";
+    if (!is_file($packagedPhpIni)) {
+        throw new RuntimeException("打包目录缺少 php.ini: {$packagedPhpIni}");
+    }
+    $phpIni = file_get_contents($packagedPhpIni);
+    if (!is_string($phpIni)) {
+        throw new RuntimeException("无法读取 php.ini: {$packagedPhpIni}");
+    }
+    mustWriteFile($packagedPhpIni, makeWindowsPhpIniPortable($phpIni));
+
     $packagedEmbedLib = "{$topLevelDir}/{$phpEmbedLibRelativePath}";
     if (!is_file($packagedEmbedLib)) {
         echo "错误: php8embed.lib 未复制到打包目录 - {$packagedEmbedLib}\n";
@@ -426,6 +441,9 @@ if (!$zip->close()) {
 
 $requiredArchiveEntries = [
     "{$topLevelDir}/{$compilerExe}",
+    "{$topLevelDir}/php.exe",
+    "{$topLevelDir}/php.ini",
+    "{$topLevelDir}/ext/php_zip.dll",
     "{$topLevelDir}/WINDOWS-SETUP.txt",
     "{$topLevelDir}/phpx.dll",
     "{$topLevelDir}/{$phpRuntimeDllRelativePath}",
@@ -780,6 +798,29 @@ function copyDirectory(string $src, string $dest, array $excludeDirs = [], ?stri
     }
 }
 
+/** Preserve enabled extensions and line endings while removing the CI path. */
+function makeWindowsPhpIniPortable(string $ini): string
+{
+    $bom = str_starts_with($ini, "\xEF\xBB\xBF") ? "\xEF\xBB\xBF" : '';
+    $ini = substr($ini, strlen($bom));
+    $portable = preg_replace(
+        '/^[\t ]*extension_dir[\t ]*=[^\r\n]*/mi',
+        'extension_dir = "./ext/"',
+        $ini,
+        -1,
+        $replacements,
+    );
+    if (!is_string($portable)) {
+        throw new RuntimeException('Unable to rewrite extension_dir in php.ini');
+    }
+    if ($replacements === 0) {
+        $newline = str_contains($ini, "\r\n") ? "\r\n" : "\n";
+        // Prepend to the global section, not a trailing [PATH=...] section.
+        $portable = 'extension_dir = "./ext/"' . $newline . $ini;
+    }
+    return $bom . $portable;
+}
+
 function mustCreateDirectory(string $dir): void
 {
     if (!is_dir($dir) && !mkdir($dir, 0755, true) && !is_dir($dir)) {