Stop unused PHP versions

cli/Valet/PhpFpm.php

@@ -178,6 +178,21 @@ public function stopRunning()
         );
     }
 
+    /**
+     * Stop PHP, if a specific version isn't being used globally or by any sites.
+     *
+     * @param  string  $phpVersion
+     * @return void
+     */
+    public function maybeStop($phpVersion)
+    {
+        $phpVersion = $this->normalizePhpVersion($phpVersion);
+
+        if(! in_array($phpVersion, $this->utilizedPhpVersions())) {
+            $this->brew->stopService($phpVersion);
+        }
+    }
+
     /**
      * Use a specific version of php.
      *
@@ -305,8 +320,8 @@ public function fpmSockName($phpVersion = null)
      * If a given file is pointing the custom sock file for the new global version, that new
      * version will now be hosted at `valet.sock`, so update the config file to point to that instead.
      *
-     * @param $newPhpVersion
-     * @param $oldPhpVersion
+     * @param  string  $newPhpVersion
+     * @param  string  $oldPhpVersion
      * @return void
      */
     public function updateConfigurationForGlobalUpdate($newPhpVersion, $oldPhpVersion)

cli/Valet/Site.php

@@ -712,12 +712,12 @@ public function installSiteConfig($valetSite, $fpmSockName, $phpVersion)
     }
 
     /**
-     * Remove PHP Version isolation from a specific site
+     * Remove PHP Version isolation from a specific site.
      *
      * @param  string  $valetSite
      * @return void
      */
-    function removeIsolation($valetSite)
+    public function removeIsolation($valetSite)
     {
         // When site has SSL certificate, just re-generate the nginx config.
         // It will be using the `valet.sock` by default from now
@@ -1075,7 +1075,7 @@ public function customPhpVersion($url)
             if (starts_with($siteConf, '# Valet isolated PHP version')) {
                 $firstLine = explode(PHP_EOL, $siteConf)[0];
 
-                return preg_replace("/[^\d]*/", '', $firstLine);
+                return preg_replace("/[^\d]*/", '', $firstLine); // Example output: "74" or "81"
             }
         }
     }

cli/valet.php

@@ -525,7 +525,12 @@
             }
 
             if ($phpVersion == 'default') {
+                $customPhpVersion = Site::customPhpVersion($site); // Example output: "74"
                 Site::removeIsolation($site);
+                if ($customPhpVersion) {
+                    PhpFpm::maybeStop('php' .$customPhpVersion);
+                }
+
                 Nginx::restart();
 
                 info(sprintf('The [%s] site is now using default php version.', $site));