diff --git a/linux/phpvm.sh b/linux/phpvm.sh
index f119ecc..04ad1d4 100644
--- a/linux/phpvm.sh
+++ b/linux/phpvm.sh
@@ -1534,7 +1534,7 @@ _phpvm_levenshtein() {
 }
 
 # Canonical command list (includes aliases) for suggestions.
-_PHPVM_COMMANDS="install use list ls current uninstall remove which ini deps ext composer wp-cli fix-ini auto hook upgrade update version help"
+_PHPVM_COMMANDS="install use list ls current uninstall remove which doctor ini deps ext composer wp-cli fix-ini auto hook upgrade update version help"
 
 # Unknown command: suggest the nearest match instead of dumping the full help.
 _phpvm_unknown() {
diff --git a/tests/linux/commands.bats b/tests/linux/commands.bats
index 1023991..48980ef 100644
--- a/tests/linux/commands.bats
+++ b/tests/linux/commands.bats
@@ -278,6 +278,12 @@ EOF
     [[ "$output" != *"Did you mean"* ]]
 }
 
+@test "unknown: suggests doctor for a doctor typo" {
+    run phpvm doctro
+    [ "$status" -ne 0 ]
+    [[ "$output" == *"Did you mean 'doctor'?"* ]]
+}
+
 # ---------- partial version resolution ----------
 
 @test "resolve: full x.y.z passes through without network" {
diff --git a/tests/windows/PureFunctions.Tests.ps1 b/tests/windows/PureFunctions.Tests.ps1
index 70906b2..9ac3340 100644
--- a/tests/windows/PureFunctions.Tests.ps1
+++ b/tests/windows/PureFunctions.Tests.ps1
@@ -164,6 +164,11 @@ Describe 'Invoke-Unknown' {
         $out | Should -Match "is not a phpvm command"
         $out | Should -Not -Match "Did you mean"
     }
+
+    It 'Suggests doctor for a doctor typo' {
+        $out = Invoke-Unknown 'doctro' 6>&1 | Out-String
+        $out | Should -Match "Did you mean 'doctor'\?"
+    }
 }
 
 Describe 'Get-PHPZipHash' {
diff --git a/windows/phpvm.ps1 b/windows/phpvm.ps1
index 71a4c4c..8044a13 100644
--- a/windows/phpvm.ps1
+++ b/windows/phpvm.ps1
@@ -1165,9 +1165,7 @@ function Ext-Info ([string]$extName) {
 if (extension_loaded('$extName')) {
     `$r = new ReflectionExtension('$extName');
     echo 'Name    : ' . `$r->getName() . PHP_EOL;
-    `$version = `$r->getVersion();
-    if (`$version -eq `$null) { `$version = 'n/a'; }
-    echo 'Version : ' . `$version . PHP_EOL;
+    echo 'Version : ' . (`$r->getVersion() ?? 'n/a') . PHP_EOL;
     `$classes = `$r->getClassNames();
     if (`$classes) echo 'Classes : ' . implode(', ', `$classes) . PHP_EOL;
 } else {
@@ -1592,7 +1590,6 @@ function Invoke-Cacert ([string]$sub) {
 }
 
 
-# Read-only health check. Never mutates state - every finding points at the
 # True when the ini's extension_dir points at the active version's ext folder.
 # `current` is a junction to versions\<cur>, so the versions\<cur>\ext and
 # current\ext spellings name the same directory - accept either rather than
@@ -1604,6 +1601,7 @@ function Test-ExtDirMatch ([string]$iniExtDir, [string]$cur) {
     return ($acceptable -icontains $iniExtDir.TrimEnd('\'))
 }
 
+# Read-only health check. Never mutates state - every finding points at the
 # command that fixes it. Exit-code-neutral: it's a report, not a gate.
 function Invoke-Doctor {
     Write-Host ""
@@ -1751,7 +1749,7 @@ function Get-Levenshtein ([string]$a, [string]$b) {
 # Unknown command: suggest the nearest match instead of dumping the full help.
 function Invoke-Unknown ([string]$cmd) {
     $cmds = @("install","use","list","ls","current","uninstall","remove",
-              "which","ini","fix-ini","cacert","ext","composer","wp-cli","auto","hook",
+              "which","ini","fix-ini","cacert","doctor","ext","composer","wp-cli","auto","hook",
               "upgrade","update","version","help")
     $best = ""; $bestd = 99
     foreach ($c in $cmds) {